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My main setup is "finished" and Im planning on maybe buy a smaller widefield kit that I can use while my main rig is doing its thing. I have a Canon 5D and a 14mm widefield lens, but im thinking on maybe add a samyang/Rokinon 135mm lens + a startracker but im not 100% sure yet if it will last in the long run? It feels like some equipment is just suited for a few targets and then it will just collect dust untill you sell it. I live in Sweden so there are no cool mountains, valleys etc to include in the pictures so I guess I can just shoot the sky + trees.. What are your thoughts on buying a 135mm lens+ a tracker, is it worth it in the long run? If so, what tracker would you recommend? |
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Hi. Some of my best images are with the Samyang 135mm lens with a Canon 700d, usually mounted on a IOptron startracker (the old one) running a max of 60s subs. The No of stars you can resolve is astounding. It fits most Nothern nebulas in fine. When imaging with my main scope I nearly always run my Caonon / 135mm lens as well on some of the larger nebulas that just wont fit into the FOV of my main scope. I would recommend, you can usually pick one up 2nd hand much cheaper than new. |
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I use my Samyang 135 with 533/1600/2600 cameras. I also have an stock Canon 6D full frame DSLR. I have never used the Canon because of the cooling and using true astro cameras. The Rig itself (lens, camera, zwo eaf, small 30mm guide scope,120mini, dovetail bar and hardware) is heavier than I would like on my Skywatcher camera tracker. I use it on an Orion Sirius (HEQ-5) mounting instead. The combo is wonderful. I use it often. Image scale is an eye-watering 6+ arc sec / pixel with a 3.76micron pixel camera. Never a high resolution solution. However, it is extremely fast, good stars to the corners, anything not perfect is easily fixed with BXT. I would still make the same purchase today even after using it now for close to a year. CS Tim |
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| Hi Daniel, I don't have a DSLR but have achieved some nice images with my Samyang 135mm and Altair 183 OSC/M cameras, on top of a Star Adventurer 2i. With guiding I have managed up to 10 mins but the optics are fast and generally much less exposure required for good SNR. It is excellent for wider fields, and stopped down to ~f2.6 gives pretty good stars with the right back spacing. All mounted on a light weight but strong Stellarvue Al tripod, powered by a RPi4 running Stellarmate OS at 5A, I can carry it with one hand, and setup in under 10 minutes - perfect for our inclement UK weather. If you are interested you can see more here. |
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I don't have the 135 Samyang but a Nikkor 180mm F2.8. I never get tired of it. Mounted on my astro modded 6Dii, my stock R6, my 533 and now my 2600. I have it on a star tracker often while my main rig runs or mounted atop my main rig. I have thought about the 135, but honestly the Nikkor is also a great lens. I would doubt you would tire of it. |
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I have Samyang 135/2 for over 4 years and it's my favourite portable "telescope" for wide sky photos. Use it mostly with Fujifilm X-T20 camera (via Canon adapter as lens has Canon EF mount). If you have access to area with less light polution it will be even more useful due to high light gathering. Have used it in the past with many trackers, starting from original iOptron Skytracker, then Skywatcher Star Adventurer (briefly) and now Vixen Polarie, and sometimes Skywatcher EQ5 mount |
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| I have the Samyang 135mm F2 lens which I use with an old Canon 5D MKII and combined with a ZWO adapter, with my 2600 MC Pro camera. It is a lovely set up. The lens is sharp even wide open and is flat to the edge. I picked up the Astrodynium ring set for it and added a ZWO autofocuser. This is my goto rig for widefield shots of Orion, Rho Ophiuchus, the Vela region and many others. If I could only have one portable rig, this would be it. You do need to take good flats with it but this is very simple to do. For the price it is very hard to beat. |
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| The quality of Samyang 135 lens varies greatly from specimen to specimen. I tried two and they were terrible. Upon analysis carried out with ASTAP and CCD Inspector, the two objectives were affected by very severe tilt and heavy coma. The stars were so elongated and distorted at the edges that it was not possible to correct them even with BlurXterminator. These problems arose when using the lens with a QHY268M, therefore a camera with an APS-C sensor. With a larger sensor the problems would be even more serious. |
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Giulio Ercolani: Please, beware that these issues often arrise from the adapters used to connect astrodedicated cameras to the lens and is not inherently a problem of the lens itself. You can exchange the camera adapter to a standard M48 and screw in the rest of the imaging train to minimize tilt. And even then, at f2 especially, you need to dial down backfocus in the range of micrometers. I use the lens in combination with an Ogma O'tilter and Ogma APS-C camera and it dialed down all the above mentioned issues. Once you have a working system, dont touch it 😄 For OP: If you are using the intented camera with your lens, you most probably won't encounter these problems. I love the simple setup with a simple star tracker, it even procured me a IOTD! Go for it. |
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Samyang (or Rokinon) 135mm F/2 is a must-have astrophotography lens. That said, in my experience, it does have some issues to consider (some duplications with what have been said already):
Hope this helps. I am still learning how to use this lens in my system effectively myself. Seiji |
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Samyang (or Rokinon) 135mm F/2 is a must-have astrophotography lens. That said, in my experience, it does have some issues to consider (some duplications with what have been said already): Thank you for that detailed explanation! I might make an order and try it out atleast =) |
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| I have used the 135mm with a Canon 600D and now use it with the ZWO AIR 533MC pro and ASI Air. It produces amazing images. I also use a bahtinov mask to focus and it is very simple and amazingly quick. I take a few photos using the ASI Air using the mask and obtain focus in a couple of minutes. The focus is very delicate but using the mask makes it simple. You will not regret getting a 135mm and there are plenty of targets to shoot imho. Bet of luck. Cheers JIM |
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| It's as everyone has said. Very good lens. I recommend stopping it at 2.8 and keeping exposure time in line with the sensitivity of your camera. Ie for 533 mc pro its best at 3 min exposure. Any more than that i find lens flare on bright stars |
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| After gaining experience in astrophotography, I try to buy what I consider to be "forever scopes", that is, scopes that are good enough that you won't ever want to upgrade to something else at a similar focal length, because the quality of the image is great. I think the Samyang/Rokinon 135mm is one of those. It'll be fine to start with a DSLR, but paired with a cooled camera and a high-speed narrowband filter it's a killer setup. I'm still learning as I go, but this is a single night of images. https://www.astrobin.com/8rr431/ |
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Giulio Ercolani: *** *Although the tilt could arise from the adapter, the coma is undoubtedly a defect of the lens which is not sufficiently flattened at the edges. With small sensors these defects may not be evident.** |
