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Showing results for tags 'refractor'.
Found 85 results
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Hi All, I've had a reflector telescope for years but never really used it (this one) . I've recently dusted it off and decided to try my hand at astrophotography. I was really pleased with myself when I successfully pointed the telescope at Saturn and could make out the planet and rings (it looked like one big white ring but a good start). Once I'd nailed getting the planet in view I decided to hook up my Canon EOS 600D. Initially I connected it using THIS and was able to get a picture of a Saturn and ring shaped slightly blurry blob, which I have to zoom in on the image to see, thus blurring it further. For my first attempt I was pretty pleased. I then watched some YouTube videos of people showing how it's done and upgraded the Canon T-ring to THIS so I could drop a lens into it for more zoom. However, when I try the new adapter with a lens the camera picks nothing up - any picture I take regardless of how long exposure I use just comes out as a black screen - not even any stars. If I take then lens out of the adapter I get the same. I only get a picture if I use the original T-ring, back to the blurry really small blob. Does anyone know what I'm doing wrong? I'd really like to get into astrophotography but not getting anywhere yet. Many thanks in advance.
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For sale a skywatcher startravel 4 inch scope, has end caps and dovetail bar/rings. Would make a great guidescope, retail is £165, asking £100 with postage (ono), excellent condition throughout. Message me if interested...……..
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Skywatcher 100 ED Pro Esprit - Great Performance
Selborne posted a topic in Member Equipment Reviews
Hi Guys, I thought I would share with you my first hand experience of the Skywatcher ED100 Pro Esprit Telescope, I have only had it a few months, but so far I am extremely happy with the results, it is so sharp and the contrast is very high. I live in a small town, Stowmarket, Suffolk, UK, where the light pollution is not to bad, but still I have to be cautious with the direction I choose to point the telescope. All my astrophotography is done from the back garden on my patio. I have had a few different telescopes over the years, but I always found myself moving more and more into astrophotography, so after some research I selected the Skywatcher ED100 Pro Esprit, as many of the other users had commented on the sharpness and contrast. As I wanted to focus on more wide field astrophotography the F5.5 speed giving 550mm seemed the right choice, I also use an ED50 Skywatcher Guide Scope with an Altair Astro ASI130mm camera for the guiding and of course PHD2 software, all mounted on my Skywatcher HEQ6 mount. Here is a shot of the Andromeda Galaxy, 20 x 30s stills at ISO 800 on my Sony A7Rii, no filters just RAW images processed with Photoshop, Stacked Mean option. I used the Trevor Jones video on his BackyardAstro You Tube page for processing DSO's and it seems to work very well. What you will see from the image is just how sharp it is, something that really surprised me when I processed the images. This has inspired me to spend more time outside in the garden to photograph more objects, plus I have recently purchased an Astronomic CLS Filter for my Sony A7Rii, so I am looking forward to using this to see if it improve the contrast. I will keep you informed. Also I am looking forwarded to trying my Olympus EM1 MK2 camera, yes I know it does not have the capabilities of the Sony A7Rii for light gathering, but it does have a really clever mode where it can stack the images in camera to reduce noise, so I will also let you know how this went as well. Best Regards Jamie- 61 replies
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Further to my post about the Skywatcher flexible 130 p, I am now looking at a short focus tefractor. I am 70 years old so can only manage to carry a fairly lightweight telescope into my back garden. I am interested in viewing the moon, double stars, bright planets and the brighter star clusters. I am looking to purchase one of the following Celestron travel scope 70 Bresse r Classic 70/350 Skywatcher mercury 705 70mms. I understand that these telescopes have limitations, but they the only ones in my price range. Any comments or advice would be welcome. Chris P
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Hello, I am wanting (not really ) to sell my Stellarvue SV105-3SV with tube rings [not shown in pictures]. The telescope is in great condition with very little dust and no scratches. There is one very small ding in the dew shield paint but it is not dented and it is almost not even noticeable. It happened when I took the telescope out of the saddle and it lightly hit the saddle. The telescope has never been dropped or had any issues and is optically perfect with a strehl of .95 or higher (claimed by Stellarvue). I've only used this telescope for imaging however I've once or twice thrown an eyepiece in it during a star party or two and it's VERY crisp with no false color. Currently I live in Italy so that's where it can be picked up or shipped from. Price is negotiable however Stellarvue says it is worth around $1200-$1500 USD. The nice thing is you wouldn't have any VAT from Stellarvue . Please let me know if you have any questions, comments or are interested. Lastly, here is a link to some images that I've taken with it and what it looks like mounted up: https://www.astrobin.com/users/chriscorkill/ SV105-3SV Specifications Aperture: 105mm Apochromatic Precision Triplet Focuser: 3" Dual Speed Focuser with 2" and 1.25" eye piece adapters F Ratio: f/7 Focal Length: 735mm Color Correction: Excellent Minimum Tube Length: 16" in travel mode Tube Diameter: ~ 4-1/8" (105mm) Dew Shield Diameter: ~ 5-3/8" (137mm) OTA Weight: ~12lbs (5.4kg) Retractable Dewshield: Yes
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lets imagine I wasn't to see a nice DSO about 15' size and I think it should look good nicely framed with a 1 deg field of view in the EP.. Which would give the better (or higher probability of seeing anything at all ) view from a semi urban light polluted home site (e.g Bortle 6)? a) an 100mm f/6 refractor (fl 600mm) and a 10mm EP (60 deg afov, gain 60x = fov pf 1 deg) (and exit pupil of 100mm / 60 = 1.6mm) or b) a 200mm SCT with focal reducer to give f/6 (fl 1200mm) and a 20mm EP (60 deg afov, gain 60x = fov of 1 deg) (and exit pupil of 200 / 60 = 3.3mm) My gut feeling is that the SCT should give a better view just based upon its 2xaperture - but Im not sure I understand fully the maths why. Is the larger exit pupil going to result in a better / brighter / more successful view? Or will the view be 'roughly' the same ? Or have I got it all wrong..... Thanks. -
You're out with two APO refractors 65/420 and 70/478. Which one you would use DSO imaging and which of them left for visual observing meanwhile you're shooting? Why? -
https://www.astroshop.eu/telescopes/tecnosky-apochromatic-refractor-ap-70-478-quadruplet-flat-field-ota/p,57327 How to know this? I have read that with 65/420 scopes you cannot use 2" diagonals because there isn't enough backfocus.
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Hello all! I have been using my Skywatcher 8” Dobsonian for some time now, and decided I wanted a good refractor with an EQ mount as my next scope. I chose the Skywatcher Evostar Pro 80mm with an LX70 EQ5 mount. This seems to be a great scope to compliment my Dob, but I'm still getting used to the EQ mount! Found some good Youtube videos and am hoping for a clear night soon to really give it a workout! Any advice is appreciated! -
Hello all! I just picked up a Skywatcher Evostar 80mm Doublett and LX70 (EQ5) mount. This is my first refractor and EQ mount so it took me a while to put it together (if you all notice anything out of place please tell me!). I still enjoy my 8” dob but wanted to learn. This type of scope. It had good reviews for general viewing, but I'm not sure what to expect. The EQ mount took quite some time to figure out and one of my questions is do I operate the scope with the counterweight horizontal to the ground? I noticed that in that position I can use the control cables to move up and down and left and right. Any advice is appreciated!
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Hi Guys, any one had any use of a Technosky Apo or know anything about them. I am looking at getting my first apo as usually I am Astrograph man and seen this 70/478 mm quadruplet flatfield for £482. It seems a good deal but was just wondering about the build quality? As this seems cheap for a quadruplet!!! https://www.astroshop.eu/telescopes/tecnosky-telescope-ap-70-478-quadruplet-flatfield-ota/p,57327#tab_bar_1_select -
I bought this second hand, but it was almost untouched, and a relative bargain to boot. New it costs 1199 EUR from TS (approx. £1035 as of 08/03/2019 but who has any idea how this might fluctuate). Highlights: Apo air-spaced triplet with FPL53 Multiple focus positions thanks to removable tube segments 2.5” rack and pinion focuser, rotatable, dual speed controls, 6kg payload, with printed scale CNC tube rings and dovetail supplied Retractable dew shield First impressions: It’s a really nice box. Whilst it’s described as a ‘transport case’ the supplied storage box is sturdy and well made. Inside, the foam fit is precise bordering on tight. It’s actually mildly difficult to get the scope out of the box. Things get a little easier if you loosen the tube rights slightly, allowing for some tube rotation, and a longer term fix will be some straps to aid lifting the scope out vertically. The scope itself feels very well made, and is what I’m choosing to refer to as ‘reassuringly weighty’. At just over 4kg (without diagonal, eyepiece, or finder) there are definitely lighter options available, but it’s hardly a heavyweight. The finish is powered coat white, which looks and feels very nice. The focuser is very smooth (compared to my SW ED80) and feels pleasingly solid. I’m not going to be testing the stated 6kg payload any time soon, but I can easily believe it will be able to handle it. The dew shield is held in position with a single thumbscrew, and whilst it’s retractable credentials are clearly warranted, it only seems to extend a couple of centimetres. As it happens, this takes the overall length down to 450mm which was the very top end of my acceptable range in order to meet my ‘travel’ requirement. The focuser body also incorporates a finder shoe, but if you wanna finder then you have to supply your own as there’s nothing included. The idea of having additional tube segments is that you don’t have to rack out the focuser so far, and so improves stability. This also allows for multiple reducer/flattener options for imaging use. The TS website details the specific configurations using their recommended equipment which provide a faster f/4.9 option for sensors up to 36mm, or a full frame flat image at the standard f/6.6. I might be exploring these options later, but for now, this is going to be for visual use. First light: OK - this barely counts, but I was impatient. Predictably enough, first evening with a new telescope and it’s raining. But I did manage a pretty decent look at my neighbours TV aerial and chimney stack. They need some re-pointing. … The following evening (9th March 2019) was less rainy, but much the same for cloud, all but for about 30 minutes of relatively clear sky, interrupted regularly by patchy cloud. So still not great. However, my ambitious setup to allow for cooling paid off and I did manage a few minutes of actual use with a SW 28mm eyepiece. The Baader Zoom I also treated myself to for my travel use is frustratingly still not dispatched. And when I say set-up, I mean just carrying everything outside. I’m using this on the SW AZ-Gti mount, and a Manfrotto tripod I had already, so it’s very easy to pick up and take outside. I was using the scope with one of the two removable sections in place (this is how it is stored in the supplied case) and was able to achieve focus with a 2" diagonal without having to rack out excessively. Sirius was an obvious target to the south, and an easy hit. Brilliantly bright, as expected, and a blue-ish white colour. The upper half (the rest was below my sightline from home) of Canis Major was easy to see, with several of the background stars also visible. Despite the less than great seeing, the view was impressive. Stars were tight and there was no obvious chromatic aberration. Moving up to Betelgeuse, it’s orange-red brilliance was very pleasing, and again I was able to make out some of the fainter surrounding stars. Overall the view was very impressive, and bright. My only real comparison is with my SW80, and of course I now have over 25% more light, so that’s to be expected. But still, it makes an obvious difference. I wasn’t able to note any CA or distortion, and a quick full visible spectrum (no filters) star test reflected spot on collimation and no apparent astigmatism. Alas, the break in the patchy clouds did not last long, and I was soon packing up for the night and heading out for a beer. I’m looking forward to getting some more quality time with this kit, and who knows, I might even align the AZ-Gti next time and write a brief review for that too.
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Takahashi Fetish Continues .........
Rainmaker posted a topic in Discussions - Scopes / Whole setups
Another day another Takahashi ......... when will I ever escape this vicious circle ??? Just when I had resolved not to buy any more astro gear, someone advertised this scope at a very, very tempting price.... here we go again, my dear wife just shook her head when I told her I would be away for a couple of days picking up another telescope. Enter the Takahashi FSQ106ED build # 89 of 2014, in immaculate condition with a genuine Takahashi FSQ case, Extender-Q 1.6X, Clamshell and a pair of LE eyepieces. How could I say no? To say that I was happy driving the 700 alms back home would be an understatement ..... Thanks for viewing -
Hi all. Considering a new scope, and specifically a new refractor scope specifically for lunar and planetary work. Seen the Altair Starwave F11 102mm achromatic OTA which doesn't break the bank too much. With the longer focul length CA shouldn't be too noticible, and as I have no intention of doing any imaging with it then an APO scope seems a little expensive just for visual use. Anyone have one of these for visual use at all? Any feedback (good/bad) would be welcome. http://www.rothervalleyoptics.co.uk/altair-starwave-102mm-f11-achromat-refractor-telescope-with-2-crayford-focuser.html
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I'm considering to build a nice all-round wide field 150mm binoscope, mainly to observe DSOs and, why not, some planet observations. The priority is wide field observation with good contrast at 5 pupil exit, and also good contrast on smaller DSOs at 2-3 exit pupil, so I guess the focal length should be 900mm at maximum. I don't mind too much some chromatic aberration observing the moon and planets at 100 X, I'm not aiming higher than 100-150 X for planets. I want this binoscope to be a keeper for life. I'm considering these refractors, and I would like to hear your suggestions and recommendations based on your expertise: (1) TS 152mm F5.9 http://www.teleskop-express.de/shop/product_info.php/language/en/info/p2229_TS-152mm-f-5-9-Gro-feld-Refraktor-mit-3--Crayford-Auszug.html (2) iStar WFX 150mm F5 http://www.istar-optical.com/refractors-ii.html (3) Celestron Omni 150mm F5 http://www.teleskop-express.de/shop/product_info.php/info/p4010_Celestron-Omni-XLT-1590R-Rich-field-Refractor---Optical-Tube-Assembly.html I plan to use high end 2" barrel eyepieces, like Ethos 13 for the 2-3 exit pupil views, and other eyepieces suited for binoscopes (less that 6.2 cm diameter) for the 5 exit pupil range. Which pair of refractors do you think will do the job better and more cost-effectively? I'll consider other refractors you may suggest. Thanks in advance
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I just bought an Istar 150mm F12 lens and cell and will be building the telescope to hold it. The guy I bought it from has generously given me some excellent advice, so I know where I will get the aluminium tube and how I will cut it, how I will plan the light path and baffles, and how I will flock it internally. He also suggested a couple of focusers that he has used and likes. I think I will probably go for a Moonlite focuser as I have one on a newtonian and I really like the smoothness and precision of it, but I am also considering a couple of others. Do any of you have either the TS Monorail or the Baader Steeltrack? What do you like and dislike about them? I will be using the scope for visual observing only and the heaviest eyepiece I will use on it will be my Explore Scientific 30mm 82° at 1.4kg. Thanks.
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Hi all, not sure if this is the right place for this, but cannot decide which is the better one.. Here is my problem; I have an old Telephoto lens that is an 86mm achromatic and has a variable focal length of 600 to 1300mm. I have had this years and don't really use it anymore, it's no good for astrophotography as it stands but after some experimenting with various eyepieces jerry rigged in the end of the lens I have found it makes a very good and effective refractor telescope...and as I want a larger finder/secondary scope on my LX90 this would seem to be a good use for old equipment. The lens has a 42mmx0.75mm male thread on the end for the attachment of camera adapters. I have had a look for a female threaded adapter that would allow the use of either a single or interchangeable eyepieces on the lens. Does anyone know of any such adapter, or perhaps a couple of adapters that would allow the end game I want... Thanks everyone. Jim
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Hi all, I am thinking of adding one of these to my Christmas list. I want it primarily for astrophotography with my aps-c Canon on the Star adventurer mount, with a sturdy photo tripod (I have all of those already). For £399 it seems like the best combination of value and performance to me, but what's your opinion? https://www.altairastro.com/starwave-70ed-f6-travel-refractor-telescope-with-2-crayford-focuser-finder-diagonal-eyepiece.html thanks Mike -
found a $40 refractor at a goodwill today. will include some pictures, is it worth the money? has a EQ mount included, and for just 40 I'm seriously considering it. tips? it has no eyepeices included, but the mount looks sturdy and the i don't yet have a refractor so i really want it.. if its worth it. pretty sure its worth over $200 but idk 4 sure. remember that i know so little about refractors that i had to google how they worked.. again. but that mount alone would be worth it, even if the optical tube isn't. please feel free to tell me its not worth it, i don NOT want to waste money on this. -
Hey everyone ! I am new to this site , don't know how to properly use it , but hope someone will help me As the topic says , I am trying to buy my first telescope , and am quite excited for it. I have been reading wuite a lot about astronomy , so I know most of the basics , but have many many unanswered questions ... xD I was originally looking for a scope for viewing the planets , but well , after learning more , I thought that maybe a scope that can show only planets will eventually get a BIT boring , and will not be used much (although I still admire the planets and still will want to observe them). Just a quick info on me : I live in a city , have no place to go / or car to transport my scope to a darker place , live in a building , hope to observe from the rooftop. My ONLY CONCERN about this is that from my balcony I can see Vega at night , and as depressing as it may sound , nothing more .It may be because there are buildings covering my view (I at least hope so that's the case) or light pollution , although the place I live is in the orange to red zone in many light pollution maps. So originally I stumbled upon the Orion Starseeker IV 80mm GoTo refractor. http://www.telescope.com/Telescopes/GoTo-Computerized-Telescopes/Orion-StarSeeker-IV-80mm-GoTo-Refractor-Telescope/c/1/sc/15/p/113919.uts Thought it was good for the GoTo and stuff , but after doing some research , got concerned about the sturdyness of the mount.Some said it was too shaky (I have almost constant winds of about 10mph at night here) . Plus after some while I discovered DeepSpace and got even more interested in it than the planets . So I started to seek for reflectors. After a while I discarded Dobsonians as an option , cause I do want to do astrophotography ( just amateur , not gonna spend money on expensive DSLR s or sth) . And maybe in the future I will want to do some more serious astrophotography , so it will be very sad , if I have to change the scope later , if I want to... So after doing some research I am currently watching these scopes . 1. Orion 9827 AstroView 6 Equatorial Reflector Telescope . https://www.amazon.com/dp/B0000XMSR0/ref=psdc_499154_t1_B01N2HJBQC 2. SkyWatcher Explorer-150P EQ3-2 Reflector. https://www.firstlightoptics.com/reflectors/skywatcher-explorer-150p-eq3-2.html The only downside of these is that they're not GoTo (The second one has an option , but it's out of my price range) , but I think an additional RA motor drive will do the thing. At lease if I will be able to find anything in my sky ... That's it ! If you own/have used any of these scopes tell me more about them ! What you like/dont like etc. ANY GENERAL ADVICE IS APPERCIATED . Thanks ! -
Hello guys, I may have found exactly the forum I need here I would be really glad if you could help me a bit please : I love stargazing on the mountain next to home (low light pollution), but now I want to level up. I mean, I'd like to use a device that is better than my eye to see the night sky. The problem is I am quite lost between telescopes, lenses, reflectors, refractors, and hybrids devices etc. So here I am, coming for your advice that will be, I am sure, of great help. Here's my question : what device is best suited for my use ? I'd like to see constellations and close deep sky like big galaxies (andromeda M31 for example). I am aware that refractor lenses are less bright than reflexion telescopes but I'm not certain which one to buy. > The main purpose would be a looking through device, but ideally if I can plug my Canon DSLR it would be fantastic. What are best brands for an amateur ? I prefer to pay more but once than cheap but twice and have a budget of around 250-300 € (if one is a bit above but really effective I can go a higher). Thank you a lot in advance for your time and advice ! Golfox2
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A new (old) 'frac added to my wee family of scopes. From an Astromedia kit of a slightly smaller copy of one of Galileo's refractors. Not had a chance to view the night sky yet, but get a 12x magnification, so should be able to see the moon in a little more detail. Field of view is small, but as one of the first kind of telescopes made this was cutting edge back in the day I guess! Hope for a chance tonight to observe something if the clouds permit! -
I do a lot of travelling and would like something properly portable. Obviously I would not get the performance that I get with my 6SE, but that would be an acceptable compromise. I have been looking at two posibilities, the Celestron Travel scope 70mm, 400mm/f5.7 or the Meade EXT80 with backpack which is 80mm 400mm/f5 Has anyone used these and what are their opinions?
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From the album: The Great White
This is a Skywatcher 150mm Frac that I bought slightly battered and bruised... she was old school blue but she's had a make over and is now the pride of my fleet :-)
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