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Found 36 results

  1. Hi everyone! As I said few days ago in my presentation I recently got my first scope (skywatcher 127) and over the last days I tried to test It. Due to impossibility (temporary) to bring the scope in a decent location to make observations, I had to test it from home through a window (and under the sky of London - not the best at all). So i know that quality is of course affected. On the other hand, I am sure that the performances are worse than I could expect also under these conditions (maybe you will correct me) and would asks for opinions to improve. As a (mainly) planetary scope, I did not have a lot of choice: no Moon, Jupiter and Saturn out of my field of view. I pointed at Mars. First sight, I see the very big central obstruction. I played with the knob of the focus to get rid of the big black spot in the centre of my target and here you are the issues that I would like to talk about: 1) the target became very small (ok) but still was not focus (very blurry and not a lot of clues to get atleast the shape of the planet well defined - can imagine to find any detail on it ) 2) Also the colours did not convince me as no other colour than a light yellow was visible 3) Changing the eyepiece (10 instead of 25) for a magnification of 150x did not improve the situation: probably the image was even worse, more blurry with more irregular shape than before, no ability to focus at all. Differences from before : bigger (but still much smaller than expected) and very little variation in colours (I believe I saw a bit of orange). To complete, later, I tried the scope to stars: Orion costellation was visible from my place and tried to all the stars. Although still a bit blurry (the brightest stars), I had impression of more sharp view, differentiation in colour and better shape (stars almost like a dot). Moreover, to give you a final idea, Mars (at the best focus I could get) did not appear that much bigger than Betelguese. What do you think I can do to get better results? Could be a scope problem or some adjustments needed? Unfortunately I have no comparisons. Thank you, Hope I was not too long
  2. I’ve just acquired the above (birthday prezzie!). It’s a nice finder, and a definite boost from the 7x30 bundled with the scope! However, I’m struggling to get anywhere near focus with my Pentax K50 on the end of it... anyone know why? There’s no focus mechanism to speak of, other than the objective lens’ mounting thread...
  3. I spent the full night out last night and got 6 hours of Ha lights on the Bubble and the Horsehead. Reasonably pleased with the results, but even though I followed my usual process and got good focus statistics in APT, I am slightly out of focus with roundy stars and some are even slightly donutty. Samples are attached below. Problem: - After getting close to spot-on focus, the APT Bahtinov Aid showed a focus distance oscillating from -0.02 to +0.02. Seeing seemed good to the inexpert eye. Not so sure about transparency as there was some thin, wispy cloud throughout the night. So, I started the night's imaging with focus 'Close' rather than 'On' focus. - Different subs show different quality stars, ranging from small donuts to circles. Background information: - HEQ5 Pro Rowan; SW Esprit 80 with field flattener, SW stock manual Crayford focuser; ZWO EFW Mini; Baader 1.25" 3.5nm Ha filter; ZWO ASI1600MM Pro binned 1x1 @ -20c. - AA Starwave 50mm guidescope with ZWO ASI290mm Mini guidecam binned 2x2. - All subs are 300s, gain 139, offset 10. - Polar alignment with Sharpcap to 17 arcsec ("Excellent"); capture with APT; guiding with Phd2. Focus with Bahtinov mask and APT Bahtinov Aid. Stacked in DSS with Darks, Flats and Dark Flats. - Mount is well balanced in RA, but is very camera-heavy in Dec. - PHD2 guiding was around 2"/px. Imaging pixel scale is 1.9"/px. Questions: - Do I put the round stars down to seeing, given that the Bahtinov Aid focus distance was bouncing equally above and below zero? - Can poor seeing cause the donut stars? - Would an electronic auto-focuser do any better in this situation? - Would the Seeing Monitor in Sharpcap give useful information? I didn't think to use it last night. - Could my guiding performance, and possibly the Dec balance, have affected the image quality in this way? - What are my options in future - abandon imaging for the night? Bin all images in software 2x2 or 4x4 to sharpen the stars at the expense of lower resolution? - Other suggestions? Sample 1: Detail from a single 5-min sub of Bubble nebula at 100% showing round stars, and a blurred bubble. Sample 2: Detail from a different sub of the Bubble nebula at 400% showing donuts Sample 3: Detail from a 5-min sub of the Horsehead nebula at 100%, showing both round and donut stars Finally, both images stacked, calibrated and stretched, scaled to 4x4 in Gimp. 28x300s Ha on bubble, 22*300s Ha on horsehead.
  4. Hi all, I've been dabbling for about a year and am having a lot of fun. Nothing too serious and I don't have mega expectations but I'm starting to wonder if my images could be sharper and there's something I'm missing. I'm attaching a picture which is the best 10% of a 3 minute video with 500d 'bolted' straight to the 200p f5 scope. No filters...no barlows...just camera straight on. It's sharpened and saturated after the fact so in every way this is the sharpest I can get it. I've always had the same issue whether it's with a single shot, stacks of shots, or stacked video. Views through the eyepieces (circle-T 12.5/25) are mega sharp! I'm happy that collimation is very good and it was a remarkably clear night tonight. All in all I'd be pretty happy with this image (maybe over exposed a bit...) if the craters with shadows didn't make me want to rub my eyes. Thanks in advance for any thoughts or advice!
  5. Hey there! So if you have a telescope as mentioned in the title, you probably noticed that the focus wheel stops working after a bit. Well If you look under the focuser you can see a small metal piece with 4 screws on it. You need a Philips head screwdriver to unscrew these, WARNING there's a lot of superglue(which actually isn't needed at all) so wear gloves!after you've unscrewed the metal piece a small black 2 ended piece should fall out. If it didn't fall, take it out. Now place your focusing wheels back without that small piece that fell out and screw everything back in. The remaining black piece that fell out should probably be thrown away. Now just don't focus out to the max and everything should work just fine! I hope this helped(btw I'm new here so i might've butchered the terminology) *just let me know
  6. Hi i own Celestron 130EQ which comes with 20mm erect EP and 10mm EP.... i bought a GSO ED 3x Barlow... The focus is not very sharp while using Barlow... Is it the EP at fault ???? Is it worth upgrading to Kelner or a Plossl ????
  7. Hi, I bought some Williams Optics Binoviewers. They appear very nice quality but I cannot achieve foucus with them on a 5" Celestron Newtonian, FL = 650MM fr = f5. I have not used binoviwers before today and I bought them primarily for my new telescope which hasn't arrived yet, a Celestron 9.25 CST. I wanted to try the binoviwers out on the 5" today but could not achieve focus. I also tried using the 1.5 x Barlow that came with them. Is there a reason they won't focus? Do you think they will be OK on my bigger scope? Thanks.
  8. Can I reach focus with a DSLR and a focal reducer like with a barlow because my telescope does not have enough inward focus .
  9. Hello all, I’m a newbie...that will become very apparent in the next few sentences! I have a Celestron Nexstar 130 SLT and have a desire to take up astrophotography, I started with a few reasonable shots of the moon with my iPhone and have bought a Skyris 236C with no success. I would be greatful for any tips or advise on how to focus the moon for a start, I have uploaded a couple of photos one with the iPhone and one with the Skyris taken at the same time. TIA, Tony.
  10. Hi, i just wanna share a in depth review that i made on how the Primalucelab Sesto Senso works, and how i actually runs an autofocus routine with it. you can watch the whole review on my youtube channel here:
  11. Hi guys Can anyone identify which control box this is? Is it focusmaster? And does it run off robofocus driver in Indi lib as I cannot get a successful connection (in indi within ekos) I bought a robofocus motor with this control box second hand. I have faith with seller that hardware works as should. I've tried other cables and USB ports too. The software (k stars) I use does do port search when connecting equipment.. Any help appreciated Wayne
  12. I acquired a second hand Coronado PST. The focus knob doesn't seem to have any effect on the image and, although it turns, it feels as if something inside the scope is "slipping". Is it worth opening up and taking a look to see the focus knob in action? Is there anywhere that services the PST without sending it outside the UK? Are there any nasty surprises if I open it up (springs, pressure points etc)?
  13. Hi all, Absolute newby here - my first foray into astronomy. I bought a Saxon 1400mm 6" refractor secondhand complete with a EQ mount for a bargain price and I'm keen to get it working properly for both planetary and deep space observations. I invested in a few extras such as a laser collimator and a 3x barlow. I think I have a handle on how it all works including the EQ mount. I took the scope out for a test over Easter - which just happened to coincide with a ISS transit of the full moon. Rippa, I thought, that would be great to capture on my first night of observations. The problem I have is the complete inability to focus the scope to anything like sharp enough. I have some photos I took with the scope attached: The scene with the normal camera lens for my daylight practice session A shot of a distant house with the telescope (using a Nikon D7000 on a t-mount adaptor) The same house with the barlow attached A shot of the moon- no barlow - as sharp as I could get it - certainly no way to see the silhouette of the ISS with the scope this out of focus When I was collumating the scope, I noticed a that the reflection on the primary mirror was not a single spot but rather a line ... which means that the laser on the collimator target is a line rather than a dot I confirmed that this is not a problem with the shape of the laser beam coming from the collimator by showing the shape on my hand at a distance of 14m I'm not sure if the distortion of the laser is the fault of the secondary mirror or the lens(es) in the bottom of the eyepiece mount. I'm also not sure if this distortion is what is causing the inability to focus the scope, but I suspect that both issues are symptoms of the same problem. I'd appreciate any ideas on what to do next to resolve the focus issue.
  14. Two questions if I may. 1. Can the three screws marked by yellow arrows in the picture below be used to mount a second finder shoe on the C11 EDGE HD scope, permitting both a straight through and a right angle finder to be fitted? 2. The EDGE has field flattening optics inside; is the distance from the visual back to the chip critical, or by making adjustments to the position of the mirror to achieve focus on a chip say 250mm away from the visual back mean the field will still be flat at that distance? Thanks. James
  15. So my birthday just past so money to splash on astro stuff , i will have my 1000D modded by juan at cheapastrophotography and also have ordered an autofocuser from deepsky dad https://deepskydad.com/autofocuser i know they can be done DIY but this is a neat package and costs about the same as a SW autofocuser and a hitechastro focusmaster and i`m no electronic wizard and pavel seems to have a good product and works with ascom and confirmed it works with APT i will update in a few weeks time when hopefully i will have received and tried out .
  16. Hi I have a Skywatcher 200PDS. I managed to get images of saturn, jupiter with the telescope and the ASI120MC-S camera. However, to get a bit more magnified image of these planets I got myself a Barlow Tele Vue 3x and Revelation 5x. I am having trouble with this setup and really disappointed now. I am not able to achieve focus with any of these barlows using my planetary camera. I have added extension etc. but no luck whatsover. I just see a blank black video preview in SharpCap. I have seen people using the same setup and getting good images out of those. Any help highly appreciated. Thanks and Regards, Yogesh
  17. Hi all. after receiving my scope yesterday I went outside for about half an hour with it and was quite impressed on how easy everything is to set up and use. However I have two questions that I would like answered. When viewing at the moon using my 25mm eyepiece I could see a blue and orange haze around the left and right side of the moon. Was this because I didn’t have eyepeice focused probably or is there another reason? And also while focusing I had a lot of vibration is there a way to reduce it. Today I tried to get my red dot focused aligned with my telescope and I think I’ve managed o do it correctly but was concerned that my target was to close. My target was the Ariel on the roof top as I didn’t have any clear targets that were far away I had to choose that. I managed to get it aligned probably but heard that the targets were supposed to me further away? Man Thanks
  18. I came across a video on youtube of a flymesh bahtinov , not focal length dependant has anyone ever tried this method before ? mesh he used is approx 1.5 mm sq and one half of the mesh is at 45deg to the other half ,found after i purchased a mask for my mak but still need one for my 130pds . https://youtu.be/IeUs7pFwMJw
  19. hi..i have star discovery 150p scope with rockandpinion focuser... low magnitude is ok, but with greater magnitude (8mm eyepiece) i just cant get nice focus...stars canr be dots... i colimated it perfectly with lasercolimator
  20. Hi I’ve recently got some shiny new kit, and last night was the first clear skies here when I had the opportunity to try it all out. This is not my first time observing, so I’m well prepared for unexpected issues, but it is my first time ccd imaging. There was lots of learning, including; cable management needs to be better, I (still) never have the right USB cable, and the focus tube needs some mechanical refining to address slippage. But the problem I’m not sure how to solve is one of focus. I bought the SW Trius 814 kit (Trius 814, mini usb filter wheel with OAG, and Lodestar X2) and naively thought that perhaps if it was sold together it would all work together. And maybe it does, I’m not immune to stupidity I could achieve focus with the 814 relatively easily, and even captured a test image and solved it in Ekos, all very heart warming. But I couldn’t then get focus with the Lodestar X2 (attached to the integrated OAG in the mini wheel) without pulling the focus tube out considerably further (approx. 50-80mm I didn’t measure). This obviously isn’t ideal. Am I missing something? The setup is: ED80 -> Field flattener -> filterwheel with OAG -> Trius 814 with the Lodestar attaches directly to the OAG. All advice appreciated, and please don’t imagine that I won’t have missed something ‘obvious’ Thanks Justin
  21. Hi SGL Wizards, I'm using an ED-80 with HitecAstro DC Focus, and am controlling it via SGP Pro. I've got autofocus working well (hooray!) but notice that each night the Focus Control's Current Position number gets larger and larger. For example, a month or so ago it was around 9000 for focussed stars with a H-a filter. Tonight it's 12884. Is this normal? I'd expect the number to be absolute, i.e. always around the same number but with some slight variations given temperature and the like. Thanks in advance, - Lee
  22. I'm brand new to this site, but I'm having an issue with my Celestron Powerseeker 127eq telescope. It's brand new right out of the box today. I have another telescope, Zhummel Z10, but the celestron just won't focus. It gets so close to focusing and just needs a little more. Any my help is appreciated thank!
  23. Hello, Am very new to this so apologies right from the start. I have recently just bought a skywatcher akyliner dobsonian 200p and i set it up. However the image is very blurry even when i remove all magnification and just look into the primary mirror eveything looks very blurry including the moon or nearby trees etc. I am unsure what the issue could be as i am eager to get started on my stargazing! Could someone please assist me or at the very least point me in the right direction. Kind regards
  24. I am using a Baader Hyperion 36 mm 72° eyepiece with the Starwave 152mm Refractor and cannot get focus unless I use extensions for visual - for imaging it is imposible. Any Ideas ? Ernest Ernest
  25. Hey ? I took delivery of a Skywatcher 200p last night and got it set up ok I think. I got a good view of Jupiter with the 25mm lens but when I put the Barlow lens in I couldn't focus it. I also tried the 10mm lens but it made everything grey, no real light comes in at all. It came with a thing that might be called a focuser extension, not sure, but it didn't help. What rookie mistakes am I making?
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