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Showing content with the highest reputation since 13/10/19 in Posts

  1. 22 points
    TEC140 and Atik 460. Two hours L and an hour each RGB.
  2. 19 points
    The middle of September brought with it many clear nights to Berkshire (as usual starting with the full moon) and during it I captured 3hrs per channel RGB, 19hrs Ha, 7.5hrs Oiii and 5hrs Sii (total 41 hrs) on the Elephants Trunk Nebula (quite a lot of whilst asleep). Equipment used was my Esprit 150/SX-46 with piggybacked Esprit100/ASI1600mm on a Mesu 200 all controlled through SGPro. Guiding was by OAG with dithering on the Esprit 150 every 3 or 2 frames depending on whether it was taking RGB (10min subs) or Ha (20 min subs). Exposures on the ASI1600 were 5mins and about 15% were lost to dithering and autofocus on the Esprit 150. Processing was done in Pixinsight and Photoshop with the StarNet star removal tool in Pixinsight used to remove the stars from the narrowband images. Starless and starry narrowband images for each filter were then blended in PS to produce images suitable for combining with the RGB as HaR_OiiiG_OiiiB or on their own as SHO. Ha was then used as luminance over both. StarNet was then applied to these images, PS heal brush used to remove artefacts, channels split and combined with lightly stretched and split RGB (Photoshop blend mode lighten) for tight stars. These new images were then blended with Ha as luminance and the non star removed HaLum_HaR_OiiiG_OiiiB and SHO for the final result. The Elephant's Trunk Nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. Thanks for looking, c and c welcome Dave
  3. 18 points
    Surprisingly it stayed clear all night so I got almost 14 hours from my dual Esprit rig on this enigmatic planetary nebula. There was a full mon of course but I still took the chance of collecting some RGB with the Esprit 100 and ASI071. I only expected that I at best could use it for star colour but the data turned out to be virtually without gradients. It probably helped that the scope was pointing away from the moon. I also decided to go for rather short subs so I ended up waiting for my computer to stack 263 x 90s of RGB data. On the Esprit 150 the ASI 1600MM was collecting 2 hours of Ha (Baader 3.5 nm) and 5 hours of Oiii, (Baader 8.5 nm) yielding another 200 or so subs. I also shot some 10s and 30s subs to save the very bright core of this nebula - the actual eye. The result of shooting the sky with the Esprit 100 was a quite wide field with a rather small nebula, so I post it from wide to narrow here. Suggestions and comments most welcome! Cheers Göran
  4. 14 points
    Around ten years ago I spent some time solar observing with a friend using his solid oak observing seat that somebody had handmade. It was height adjustable, with an adjustable footrest, and made it very comfortable to sit and let the tracking mount follow the solar sphere as we observed it. However for the following few years the gear I took to star parties tended to be imaging based, so no need of a dedicated seat for observing. These days though I just pack my trusty 18" Dob, and at the recent Kelling Heath SP decided to cave in and get a Tracer 12V battery while they were on offer. Combined with the tracking platform that sits under the dob base the battery pack really completes my push-to setup nicely, but I do tend to find that slightly crouching or bending a bit is causing me more and more back pain lately, indeed I missed a whole clear night of observing during the main star party due to the pain. This in turn leads to sometimes cursory observing on my behalf, sometimes missing out on the finer points of a particular object. So when a second hand oak observing chair came up at the boot sale on Saturday morning at Kelling, I thought that the £80 asking price might be money well spent. The fact that I am a sucker for solid oak items bore almost no influence on the decision Well, I have to say, what a difference! Being able to sit comfortably and just observe, without having to crouch or bend or nudge the scope made a MASSIVE difference to my enjoyment of the sessions, and with a relaxed comfortable posture, I was able to spend much longer on individual targets, properly using averted vision for extended viewing, and also eyepiece tapping. It was very gratifying to slowly work my way through H beta, Oiii and UHC filters side by side, really getting to grips with the different views they present, which was especially enjoyable on the Rosette nebula, and M42. My wife even joined me at 2am one night and we stayed out until dawn, and even she commented that the time just flew by using the comfortable chair for observing. An additional highlight was the California nebula (NGC 1499), which through a 21mm Ethos with Lumicon H beta filter just seemed to go on and on, but without the support of the chair I would not have been able to observe the half of what I did of the nebula, it would have been too painful. Needless to say I am delighted with the purchase and look forward to the next trip out with it, which may hopefully be at SGL 2019 very soon, or at Kelling Heath again in November. (Pic taken with phone and a placed red light just to test the effect, I like to observe with absolute minimal light sources around! As it was, we had the whole of the bottom red field at Kelling to ourselves when everybody else left, and enjoyed a really dark situation)
  5. 10 points
    A friend tipped me off that some clear skies were advancing in my direction so at 7pm I ventured out with the big 12" Dob' for its second outing since buying it second hand a few weeks ago. The 12 dob just fits through the door frame and settles nicely on a concrete patch in the patio and on went the tube. I used a laser collimater to align the scope having attempted to collimate the collimater earlier in the week (it was way off). Connected up the battery and started to align. The sky was looking very grey with the rising moon, streetlights and damp in the air from rain during the day so I wasn't sure what I would be able to see and as this was an unexpected outing I hadn't prepared any particular targets to vue either. For some reason the suggested alignment stars always seem to below the fence or behind a house. I settled on Altair and Mizar. Mizar making a nice double to start the evening. Taking my tour around anticlockwise to start with I slewed to M13 as a nice easy target. The cluster showed up clearly against the grey sky with a 15mm EP and a number of outlying stars could be resolved, the centre starting to look a little grainy The next target was M57, the ring nebula. This landed in the right half of my 25mm EP fov so I guess my alignment was a bit hurried. The ring was unmistakeable and it was nice to be able to look at it directly and then see even more with averted vision. My CLS filter and the 15mm ep helped to subdue a bit of the grey background. Then came M27, the dumbell nebula, which was also nearly overhead. Ive seen it clearer than this night, but it was again an obvious misty patch looking a slightly rectangular in shape. The CLS filter helping a little bit to subdue the background again. At this point I noticed that my stars were looking a little astigmatic so I checked the collimation. I dont know if the scope had just settled a bit or I had jogged the flextube, but it wasnt quite right. I also noticed that the standard skywatcher EP adapter tilted the collimater when the screws were tightened. Returning indoors for a rummage in a box of bits, I returned with a Baader 2"-1.25" adapter and the collimater sat nice and squarely in it. The collimation needed a slight adjustment and was rewarded by some nice dark circles right in the middle of any out of focus star images. The moon was now advancing and blanking out most of the sky so I switched to some star clusters. M103 came first which revealed its lovely triangular shape with the red giant star showing clearly near the centre M29 came next, slewing back over towards the west now away from the moon, which is a new addition to my Messier collection. The small triangle and rectangle were quite clear and reminded me of the Pleaides (which were still behind the tree near the moon). M39 was another addition to my Messier collection and appeared as a rather loose collection of stars. In spite of the large number of stars in this region the open cluster was clearly a cluster of stars although I couldn't pick out any memorable shapes. M34 was the final cluster of the night. The cluster was clearly visible in a 25mm EP even though the moon was now quite high. The drop in temperature seemed to have cleared some of the mistyness from the air - and deposited the water all over my scope. To close the evening I toured the western edge of the moon. This is an area I haven't explored in much detail and there were a number of significant craters with central peaks casting long shadows onto the walls. I must learn what some of these are. The air must have steadied since I was able to use an 8mm EP on the 1500mm fl dob to get some nice close-in views. The dew was falling heavily by 11pm, my secondary had started to mist up and thin cloud was drifting back across the sky so I called it a night. A very pleasant and un-expect night out and all tucked up by midnight. I must get my pencils and pad ready next time for some sketches. PS - loving the posts on here for some great ideas of things to look at.
  6. 10 points
    M27 - Dumbell Nebula in Vulpecula Here's an image I took back in 2013 using Ian King's remote telescope when it was located at 'Astrocamp' in Nerpio, Albacete, Spain. Telescope: Ikharus 10" R/C @ F/8 - Paramount MX Camera: QSI 583wsg - Cooler -15C - OAG with Lodestar Exposure: LRGB= Only one frame of 600sec and 3x 600sec averaged darks Taken: Astrocamp, Nerpio 23/06/2013
  7. 9 points
    Ten hours of data LRGBHa - from summer 2018 but only just got round to processing it. Very hard to bring the faint outer shell out without blowing out the stars. Lots of very small galaxies in the background.
  8. 8 points
    Over the last couple of weeks I’ve been imaging the Crescent using different focal lengths and filters Widefield 135mm I was working out that this is the fourth time I’ve been imaging in or around the Sadr nebula. On this occasion it was because I’d already started on the data for 900mm shots of the Crescent and I thought it’d be nice to have a wider shot of the general area, putting it into context. I was inspired by @Stub Mandrel's recent results with his Triband filter to see if the same (or similar) technology in a clip filter would help with wide frame nebula images and acquired a Skytech Quadband (that transmits 2 35nm bands around Ha, Hb, Oiii and Siii – hence the name) . I must say I’m quite impressed- I got this from a sequence of 20x 150 second captures on Sunday night under a 99% moon using a Russian made 135mm vintage lens on a modded Canon 600d and a Star Adventurer. Normally I’d only attempt proper Narrowband under these sorts of conditions, but I thought it coped pretty well under the strong moonlight. The only slight concern is the halo around Sadr itself. The photo picks out how prominent the Crescent is (below centre and to the right of this picture), but also shows how “busy” this bit of sky is- the Butterfly nebula pops out, with its prominent dark lane, but the fainter cloud that it’s a part of extends beyond the frame. There are also clusters aplenty- my favourite is M29 – the Space Invader cluster just below and to the left of the centre. Probably my eighties upbringing… Hydrogen Alpha These are taken using a Baader 7nm Ha Filter on a modded Canon 550d in a Skywatcher 200p- altogether I got 12 10 minute subs before clouds stopped me. I think this is the best of the shots for showing the structure of the object and the shockwaves that form its shape; the monochrome also highlights the cloud of the larger surrounding nebula. Oiii This came from the same setup and 10 more subs, this time with an 8.5nm Oiii filter, and a 99% moon on 13th October. The only Oiii visible in this shot is around the nebula itself. The signal was quite a bit weaker than the Ha; this picture was created by discarding the Red Channel and then combining equally the Blue and Green using Pixelmath in Pixinsight. Bi-colour Finally, it’s all brought together using the same process- this time feeding the Hydrogen into the Red channel and the Oxygen into the Blue and Green. I spent quite a bit of time playing with this one. Just feeding the data in, the red was total dominant and I progressively multiplied the Blue and Green until it was more prominent (the eventual multiplier used was 2). I also experimented with trying to change the balance to bring a little more colour into it, but that also artificially unbalanced the star colour so I decided to leave it even, which makes the Oxygen mostly white. I’ve really enjoyed taking these different views of the same object and learning about it. The nebula itself, 5,000 light years away, is 25 light years across and is caused by fast stellar winds erupting from the Wolf-Rayet star visible at the centre of the nebula. It’s thought the star will imminently (in astronomical terms) become a supernova.
  9. 8 points
    Well--I think this is it. I removed some of the purple patches and gave the dark structures a more smokey, charcoalish appearance.
  10. 7 points
    My run off roof observatory is a sad sight emptied of all the kit and left draped in the cobwebs I always intended to remove. It has been an effort over more years than I care to remember populating it with mounts, telescopes and various instruments. It now sits idle and unloved. Potential fire wood. But, wait the kit sits neatly packed ready to go to a new home in southern Spain. The promise of 200 plus clear nights a year rather than the 10 or so I get in the cloudbank that is the Cheshire gap. Sunday will see the start of an adventure to load the car (very full) and set off to Eurotunnel... ...to be continued. Regards Andrew
  11. 6 points
    Had a wander last night and managed to get some firsts for me. All single frames from Sony a6300 ISO 3200 prime focus on my C6 and HEQ5- First comet ASASSN. 21:59:18 BST 30sec First Dumbell Nebula 21:30:55 BST 25sec (Light pollution starting to add a red caste I believe) First Cigar Galaxy 21:41:12 BST 25 sec (lower in the sky and not too far away from a street lamp so more red caste from light pollution I think) Overall I am quite pleased. No tail visible on ASASSN and the structure of The Dumbell is barely hinted at. If it wasn't for the LP, I would say my Cigar is my favourite of the session. Hinted at detail. I just need to learn what you guys are on about when you speak of 'stretching' etc.
  12. 6 points
    Following other posts, I am reprinting the image of Uranus that I made artificially colored, along with another that I tried to make as natural as possible (bottom left). In this IR 610 nanometer image I just piled on AS! 2 and gave the wavelets a slight tug with a 200% resize. Of course the original image was red and I converted it to black and white to make it more aesthetically pleasing. In this less processed image we can actually perceive what Uranus looks like, none of those artificial colors that are impossible to exist and with nuances of things that do not know what is real or artifact. Most experts agree that nowadays Uranus presents itself with almost no noteworthy activity, and that the only thing right is the lighter polar region relative to the rest of the planet, which can easily be seen in the black and white image. White. We then deduced that it would be virtually impossible to take anything large as it appears in the color image and that as such, most of those "nuances" are really just noise caused by over processing. https://www.astrobin.com/vrop86/
  13. 5 points
    Hi Folks,this was meant to be a Hubble narrowband,but had endless trouble with the camera losing connection whilst taking the S11.My USB length is I think at its max. Anyway settled for a bi-colour,but even my 0111 was so faint I could hardly see it.I,m beginning to think any of the narrowband filters other than the astrodons,are,nt really up to much,especially when the Moon is about. So taken with an ED80 and Atik 314L+ a total of around 4 hrs in Ha + O111. Calibrated with Bias and Flats. Cheers. Mick.
  14. 5 points
    Here's my take on the Elephant's trunk nebula in Ha, along with some of the output from Starnet++. I was just trying to understand it a bit better. The extraction of the stars seems very clean to my eyes 19 x 5mins, Skywatcher ED80 x0.85 / Baader 7nm Ha Starless (PixInsight w Starnet++, default settings) Starmap from Star Starless + Starmap layer (colour dodge, 80%)
  15. 5 points
    General view of observatories and the moon in a sky that has been clear all night. Regards Andrew
  16. 5 points
  17. 4 points
    I did some searching and thought this might be useful, these are the colour indices for the stars being talked about, and some references. T Lyrae 5.5 (Very Red!!) Garnett star 2.24 (Red) Betelgeuse 1.74 (Orange red) 15 Aquilae 1.11 and 1.54 (Orangey Orangey ) 61 cygni 1.07 and 1.31 (same again?) Vega 0.00 (White) Bellatrix -0.14 (Blue white) Sigma orionis -0.24 (Blue)
  18. 4 points
    I imaged the other night with analmost full moon and below 20 degrees. Not brilliant I grant you but far from rubbish. Alan
  19. 4 points
    That's exactly how I do it. I've always found it awkward to read stuff in the "latest first" order, because earlier messages give context to later ones. James
  20. 4 points
    The most obvious difference will be field of view, with the f7 giving you options with a long focal length eyepiece up to say 3.6 degrees or a little more. The f9 will be limited to around 2.8 degrees. There aren't many objects that big, but it is nice for the Veil and North America Nebula for example. There may be a slight advantage to the f9 for planetary and lunar observing and it will be a little gentler on edge correction for widefield eyepieces but f7 is still not exactly fast so the differences will be slight. It will also depend on glass type of the ED element and also of the second element which is as important, plus the quality of the figure and polish. The SW100 ED does have an excellent reputation I must say, and if widefield is not an issue for you then it may well be a good option.
  21. 3 points
    Carrying on with my ebay £5 camera I managed to grab this 15 minute live stack using the AZGTi and 72mm Altair scope. Processed in Startools. I feel that my Altair GP Cam is nowhere near as sensitive as this tbh. So, if I were to buy a modern camera, to use for EEVA with my 72mm scope, what should I buy? Are there any options around £300 to £500 ? Thanks for looking
  22. 3 points
    You heard it here first, folks: Gina deals in stolen firearms James
  23. 3 points
    Focal Ratio has nothing to do with field of view (fov). Fov is entirely controlled by the focal length of the telescope for any given eyepiece. Your 115mm f/7.8 Vixen has a focal length of 897mm (115 x 7.8) while a 6" f/5 is 750mm. The ratio 897:750 gives you the difference in field of view and will remain at that ratio between the two telescopes for any given eyepiece. Using a simple ratio you will get between 16 and 19% ( depending on which way you work it ) extra linear field of view with the 6"f/5 using your existing eyepieces. Personally, I would go for wider field eyepieces rather than the Newt as they will give bigger and more pleasing images. More field stuffed into narrow field of view eyepieces makes everything smaller. Nigel
  24. 3 points
    So, there was this interesting telescope on auction on Ebay.co.uk last week and I just bid the lowest amount - 35 GBP - yes 35! I was the highest bidder - kind of surprised there but oh well, luck struck and I picked it up the other day. This is Vixen made 6" Newtonian on Vixen Polaris mount. Condition I would say is not ideal but still servicable. Would need some love but the mount is smooth and I just love Vixen's slow-mo controls. These are rusty though. It has a sled focuser and surprisingly it is in mint condition and very smooth. One of the better focusers I used. The mount looks like a great one. Smooth and it can be set up in Alt-Az as well. I am still debating myself if I should tackle a little cleaning and regreasing or just send it somewhere. The same for the mirror. I can see the coatings deteriorated but still usable imo.
  25. 3 points
    Nice!! Along time ago I had an 80F5 with a 32m plossl. This summer I picked up a 30mm wide field for an 100F7 and had so much fun that it reminded me why I always had fond memories of the 80F5. Wide field is can be such a joy and really can be a inexpensive way to enjoy the night sky. Everybody should just do this from time to time it's so relaxing and entertaining. Kevin.
  26. 3 points
    Flamin busy body neighbour - while I agree a green dome would have been a little less obtrusive, I do feel some people have too much time on their hands and complain about pretty much anything and everything!!
  27. 3 points
    Damn...I was hoping to get some double glazing phone calls...
  28. 3 points
    Looks like a 2" nose piece to screw into a T ring. Dave
  29. 3 points
    I feel that the majority of alt-azimuth mounts on the market are good for small, short length fracs. However, when it comes to longer length fracs we've got to be cautious. It's not only the concern of weight that needs to be taken into account (scope + accessories: diagonal, eyepiece, viewfinder, tube rings, dovetail) but also as @John says, the length of the tube and the tripod. Within reason the performance of this set up will be a subjective affair. If the goal of the mount and tripod is to have reasonable dampening times and smooth movements the level of toleration will vary from person to person. One of the worst visual experiences is having to deal with an unstable, overmounted, wobbly set up. My own toleration of dampening down times is therefore just about zero. Taking this into account, I don't think it is unreasonable to argue that for longer length 4" fracs cut the advertised load capacity by about 40% and ensure that the tripod is at least a 1.75" steel tripod. I feel that mounts like the SW AZ5, ES Twilight I, and Vixen Porta II, are for me too unstable for a 4" f7/f9 frac. I find them unsuited to high-power lunar and planetary observations. The AZ4 is a fine mount but I have found that with 4" f9 and f10 fracs if the supplied steel tripod legs are extended the set up wobbles too much at reasonably high magnifications. A step up from the AZ4 are the heavy duty AZ mounts like the SW HDAZ (I have one but no longer sure they're on the market), or WO EZ Touch (again, I'm no longer convinced they're on sale). I cannot speak for the EZ Touch but I prefer mounting my 4" f9 on the HDAZ rather than on the AZ4. The advertised blurp states that the mount's total capacity is around 14kg, and no doubt that's true but again, weight is not the issue but the scope's length. A step up from these HD mounts would no doubt be something like TS AZ5, SkyTee 2, Giro Ercole, or Ayo II, these would perform wonderfully with a 4" f9, for example, without fear of being overmounted but needless to say, costs are a significant step from the AZ 4. To sum: If you're looking for a decent mount for general use get the AZ4. If you can find one on the secondhand market get the SW HDAZ/EZ Touch. If budget stretches and/or you really need slow motion controls get the TS AZ5 (knowing that you're covered if ever you want a 5" frac) If you want a gorgeous set up for fracs, get an Ercole or Ayo and one of those fancy Berlebach wood tripods .
  30. 3 points
    Here's how I mount and guide my Canon + 200 mm lens on my EQ5 (ignore the stepper motors - my EQ5 was a manual at the beginning) The finderscope has an ASI 120 mini mono and regularly guides at around 1 arc sec
  31. 3 points
    Here's my first attempt at imaging the Ring Nebula, taken with a Canon 2000D through the Sky-Watcher 10-Inch dobsonian alt-az, with 2 x barlow between camera and scope. I stacked 19 x 5s images with Deep Sky Stacker, with 4 darks. I think the ISO was 3600. I had to select the super pixel node to get them to stack as DSS wasn't detecting any stars due to tailing/and or slightly out of focus.
  32. 3 points
  33. 3 points
    Haha. Not sure of the obby name yet, I am expected to form an astronomy club and need to be careful not to upset my neighbours... When ordered, the difference between the Pulsar and Scopedome was around a thousand pounds, but it all depends on the exchange rate. Plus, being in Europe already, carriage costs were better - it really hurts costs to cover the channel crossing so my advantage would become a disadvantage in the UK... I also get torrential rain here and not a single drop of water gets into the dome, so happy with the weather proofing. I have no axe to grind with the Pulsar, it was actually a close call between the two but the shutter width was the winning feature for me. Having purchased the Scopedomes, for sure, they are very well engineered and pre-assembly in the factory before shipping makes sure they will fit together quickly and easily on site. The only thing to be aware of is the flat and level base requirement. Less than 1mm on flatness and 0.5 degrees on level. The brick construction was done slowly and levelled carefully as we go and the occasional use of a grinder to take out any high spots made assembly easy. I am sure the same care and attention applied to a Pulsar would also pay dividends. (Please don't hate me, Pulsar owners !!) Gordon.
  34. 2 points
    Following up on the 12 Sep post on the focuser board: The blank board was 2kg and with all cut-outs it got down to 1200g - still too heavy for our roadmap to a UTA within 15kg. Hence the work with the router to hollow out the inner layers of the cut-outs while leaving the external side untouched. This is just one of the way I came out to 'add lightness' whilst keeping the robustness. Final result is ca. 900g. After that a coat of clear epoxy to seal off the trimmed CF layers and protect the exposed wood. Clear skies, Michele
  35. 2 points
    Hi guys, here is Orion nebula taken with Oneplus 5t, through Heritage 130P on EQ2 with custom arduino tracking, 26mm plossl with Svbony broadband UHC filter in Brothle 8-9 sky. iso 1600, 27x30 sec exposure stacked with sequator no dark no bias. Also there is one unstacked 30 sec exposure as seen for reference. No special adjustments(or proper colimation) made. OnePlus 5T is good option for this usage because it has 30 sec exposure in pro mode, and it can capture raw(although this is stacked jpeg, didn't want to bother with raw editing if someone wants raws I can upload them), but it can
  36. 2 points
    Hi folks, From time to time get asked what kind of astrophotography camera should I buy on the (social) media accounts where i upload my images. There are many technical discussions (which is helpful of course) but in my opinion it often also depends on the interests of the person itself en his/her skill level... For example, I wouldn't recommend a CCD mono camera >$3K to a person who is starting his/her hobby :-). Anyhow, I attempted to capture that in a video and put it on my personal YouTube channel, here's the link: https://youtu.be/HhIAEnVMzHU Feedback is highly appreciated, and I know I have a (Dutch) accent...being a non native speaker... I'll keep at it and hopefully it will improve over time :-). Clear skies, Wido.
  37. 2 points
    I came across this post on astro adds and is quite worrying if people buy high end valued items like done in the past and will do in the future. Thought's anyone. Hope this doesn't go against any posting rules. WARNING! For people using PARCELFORCE INSURANCE to COVER items sold on Astro buy sell. It’s come to my attention that when using Parcel force to send items sold on Astro buy sell. When they do lose your item the insurance dose not cover your item. After a ridiculously drawn out claims process they have informed me that the PayPal payment is not ample proof of the items value. And need an invoice or eBay item number etc etc for proof of value. It seems to me that royal mail and it’s subsidiaries have really gone to pot in recent years since it has been privatised. I have used DPD on several occasions now with perfect results. Even when my atik camera went missing. They assigned someone to track it down and find it. I hope this is seen as a service and good piece of advice to Astro buy sell users and not taken down. Thanks for reading.
  38. 2 points
    Have a read of this offical guide to sending goods to the UK. https://www.gov.uk/government/publications/notice-143-a-guide-for-international-post-users/notice-143-a-guide-for-international-post-users
  39. 2 points
    http://www.deepskywatch.com/Articles/what-can-i-see-through-telescope.html Have a read of this.
  40. 2 points
    Rings Bought some 230mm tube rings from Telescope Express. Nice solid pair of rings. I wanted to make some chages to make it better for Alt-Az mounting with the handle on the top when fitting the scope to the mount. Makes it easier to be able to hold the scope in position with one hand while tightening the saddle clamp. Removed the dovetails and radius blocks from the OTA. Fitting the Losmandy radius blocks to the rings required drilling a couple of new angled holes in each block and tapping the holes to M6. Countersunk bolts were used to fasten on the blocks from the inside of the rings. The Vixen radius blocks on the top were easier as existing holes in the blocks could be used to bolt them in place. It’s so much easier fitting the scope to the mount now. Oh and the new knobs on the saddle worked a treat. So easy to get a good grip and get them good and tight. Had the scope out the other night. Left it to cool for an hour. Dew was dripping off the scope and had to wipe off the finder and eyepiece but zero dew on the scope primary or secondary. Had read that this scope just doesn’t dew up. Took a tour of the moons terminator and was impressed by the sharpness, contrast and detail showing. Then tried the Morpheus 4.5 which would give 541 mag. All I can say is wow. Unbeliveabe detail !!! The sensation of just floating above the moons surface was remarakable. I had thought the Skymax 180 was a good lunar scope but this is in a different league. I could see more detail than I ever did in the 180. And this was with mist and not great seeing. Can’t wait for a clear night with great seeing And also the collimation needs some fine tuning.
  41. 2 points
    I would not do that either, but if you are starting AP on a limited budget - you can in fact use it to get decent results. It is also good to know that it can be done - and more importantly why it can be done and under what circumstances.
  42. 2 points
    All kit assembled and seems to be working. Polar alignment done and now doing a large Tpoint model. Then I need check the spectrograph alignment and should be ready of a real data run tomorrow if it is clear again. Rain forecast here while I am travelling back . Regards Andrew
  43. 2 points
  44. 2 points
    tested the new cam out on the patio steps on top of a plastic bucket! the moon had a say in matters but quite please with first test out of the box. allsky.mp4
  45. 2 points
    Dew can occur quite quickly even on the primary and more on the secondary, fit a brushless pc fan on the rear end to either blow air up the tube or a fan to draw air down and have a secondary mirror heater, as I find that dew forms quickly on even my primary without the fan running and normally any dew% above 95% on the scale has a massive effect in ruining any images I get. but it's part of the newt learning process. my sct suffers even more than that tho. Ton
  46. 2 points
    That's the problem with switching dimmers, even going very fast will result in the led's strobing, or causing other effects as not all led's are the same.... Even using simpler voltage reduction dimmers, will at some point result in the led's 'dropping' out causing uneven illumination. That why I went for an EL panel, it just work with a constant flat illumination, that isn't too bright.
  47. 2 points
    For visual I'd go for the biggest dob I could get for £500
  48. 2 points
    Stellarium direct ASCOM support testers wanted: https://github.com/Stellarium/stellarium/issues/406 and https://github.com/Stellarium/stellarium/pull/761
  49. 2 points
    Well I enjoyed that, great to be so broad a question base. I did feel some of the questions failed to be fully answered though. Sorry should add, Thank you to @DaveS for pointing it out.
  50. 2 points
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