UKAstroBill

JTech have Also been recommended to me, by FLO. It’s a bit frustrating that Sky-Watcher have picked such an idiosyncratic thread size for the camera side of the reducer. I’m trying to attach a Nikon Z using Baader UFC system and am hung up on this link and how much Backfocus is going to be eaten up. Anybody found any new good solutions to attach to then M62 male flattener camera side?

The back focus calculations change somewhat if you work with a Nikon Z system with a much smaller distance to the sensor in the camera. I think it makes the Edge 8 a much more practical proposition.

So I am looking around for an imaging refractor and the specs of this imaging star for the price caught my eye. The info I have seen suggests 73mm from the M68 adaptor to the sensor and a 42mm imaging circle, and there is a viewing option now with an adaptor. The first distance is easily created with some Baader bits and the second figure suggests most of a full frame sensor will be lit. So I am not sure what the problem is? Is the 73 wrong? Is there a lot of vignetting at 42mm?

Yeah this was bugging me too, looking at early UK ££ numbers. I think there might be some confusion as to which package of the CEM40 is being priced. There are different codes for head alone without ipolar or much else, and other packages including various other bits, even before you get to the EC stuff. It's not clear to me that one can do a like with like comparison yet, though I do agree there is likely an early adopter premium.