![]() ![]() Ok, so i had an idea as to how i would incorporate the following Orion 80mm short tube Refractor into my Ioptrion Skytracker set up. ![]() One thing that concerns me is the Vignette problem you outlined and thank you very much for pointing that out! Let me ask you - are there anything that can be done in order to prevent this with a full frame? I tend to operate that way, it's a character flaw of mine However, i've been pushing the boundaries way beyond the skytrackers ratings since i got the tracker with very good results. I here you, and you are correct, this is, according to the ratings of the skytracker, way too big. Thanks David, i appreciate you taking the time to respond and providing this input. This is a problem that affects many spotting scopes, but not this scope. And this scope does indeed have sufficient infocus range that you can focus to infinity with it. But if you use a camera with a 2x crop factor with camera lenses, you will have the same crop factor with this scope. And with the Sony A7S full frame camera, it will really vignette a lot. The Orion uses a 1.25" eyepiece holder, and you are very likely to see vignetting. If you were to compare this 400mm lens to a 400mm camera lens, they would be the same FOV with one qualifier. ![]() In answer to another question you asked, yes, stars will look just like they would in using an equivalent camera lens at f5. This is too big a scope for the iOptron SkyTracker. Somebody else will have to answer regarding those specifics. The T-ring will be a separate purchase.Įxactly which field flattener to use depends on the scope. It will have the same 2 inch noise-piece interface for the scope and same t-thread interface towards the camera. If so, the instead of using the extension tube, use a Field Flattener in its place. The is often available at a kit with the T-ring which is designed with female T-threads on telescope side.ĭepending on the scope, one may need to correct for field curvature to get decent images without much distortion out to the edges of the sensor. ![]() The use of a T-ring and spacer tube is usually effective.Īn extension tube with 2 inch nose-piece interface on telescope side and male t-threads (42mm x 0.75mm) on camera side will also be required. (Item link for reference : 80mm short tube refractor I've already got a firm steady solution that will take this from dovetail to my Manfroto tripod. Thank you all very very much - i am taking a step into new waters here with this setup and appreciate and thank you all in advance for the help. Is there any reason to think that this refractor view would be any different when mounted to the A7S?ģ) Lastly, can anyone tell me how to mount a Canon EOS system to this Refractor (possibly provide a link to the right adapter)? (Item link for reference : 80mm short tube refractorġ) When using refractors, is it the same as traditional camera lenses such that a MFT mounted will give you a 2X FOV?Ģ) When i use a F5 traditional lens on my sony A7S, I can literally do a live view of the sky due to the sensitivity of the camera. I have a couple things that i'm hoping you kind folks, who have used scopes, could clarify for me My prior experience has been ONLY camera/traditional lens combos With the guide scope removed, this setup is roughly 5lbs. ![]()
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