![]() Is that correct - and does anyone feel that with the 6SE it's fine to skip the backfocus spacing - does that create any optical issues I'm not thinking about? With the net effect being that you can get focus, even though you may technically not be operating at a true f/10 focal ratio. What I think I understand is that the NexStar 6SE does indeed have a back-focus number of 127mm - but because of the SCT design with a lot of focus run - you really don't HAVE to extend that far back. I "think" at this point I understand well what is needed to create the image train when using the f/6.3 focal reducer (getting to the 105mm spacing).īut I wanted to confirm what was really needed if I use the camera WITHOUT the f/6.3 reducer. I've read a lot of info about backfocus - trying to understand the main points. One question I had about using the ZWOASI-183MC. I'm thinking I will play around with using this camera first with just the f/6.3 focal reducer - and maybe wait and see how it goes before deciding whether or not to take the plunge on the Hyperstar 6. I think at this point I am planning to purchase the ZWOASI-183MC camera, which will hopefully be good for planetary (which I will focus on) but still allow me to experiment with short exposure times on a few brighter DSOs. ![]() ![]() Thanks VERY much everyone for your comments. Thanks very much for any help/information. Is it possible to simply use the ASIAir to only connect to the camera (and not connect at all to the mount)? Then just use it to control the camera? Though I'm sure this is an expensive solution for camera control only (especially without auto-guiding) I really would like to control the camera via smartphone app versus the need for a small laptop. I've read a bit that it may not be the most perfect marraige with the Celestron NexStar mounts. Lastly, I was wondering about the ASIAir +. I am also wondering if there is a camera which could be "reasonably" good with the Hyperstar - but also decent when mounted at the Eyepiece (without the Hyperstar) for planetary imaging? I'd like to avoid purchasing 2 cameras, but not sure if it's reasonable to expect one camera to handle both of those situations? My question is around what camera (likely a ZWO) would work best with the Hyperstar? I'd like to keep the camera budget as low as makes sense - as I think I understand that I may not need a cooled camera even for DSO with the short exposure times when using the Hyperstar. All of that may come later with a new APO refractor, but for now I want to try the basics with short exposure times on the 6SE. I also don't plan to do any auto-guiding. I plan to use the stock Alt-Az mount on the 6SE, sticking to short exposure times that planetary observing and DSO with the Hyperstar allow. I've never been a photographer type - so don't think I'll ever be trying for award winning images - but would like to try to get some decent shots - and I'm open to digging into the learning curve/work that is image stacking/post-processing. Though I may still at some point in the near future decide to purchase a small APO Refractor on an Eq Mount - for now I've decided to have a go at using the 6SE for planetary imaging, plus getting the Hyperstar to also dabble a bit in DSO imaging. I've learned a ton - but I know I still have a lot more to learn. My interest was (and still is) primarily in visual observing, but I've tried to read up as much as possible on the different ways to enter into a bit of astrophotography as well. Recently I sold my 4" cheap achromatic refractor (Alt-Az Mount) and 6" DOB, deciding to purchase the NexStar 6SE, mostly for the GoTo functionality and the relative portability of the scope/mount/tripod setup. I've spent at least 6 months reading through a ton of incredibly useful information on this forum - now my first question/post.
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