Frank Szabo:
I use 2 different ones. One is the Sharpstar .95X CC the other is the Starizona 0.75X
Despite the Starizona being the most expensive CC out there (unless someone knows another that cost more than $450)
I am not totally happy with the Starizona, while the Sharpstar being less than half the price doing very well.
Here are the reasons I am no longer a fan of the Nexus CC:
1. I can't get round stars with it. It's always showing elongated stars around the corners or flattened stars across the entire field.
I tried it on 3 different News, obviously can't be that all 3 newts have the same problem and magically repair themselves when I replace the CC with the Sharpstar CC.
2. Not enough threads to attach the camera and extensions. It's barely a few turns to tighten, I don't think it's a good design this way.
3. Expensive. It cost more than my Newts really, if I dont' count the modifications I've done to them.
4. Maybe it's meant to be used on 8" or larger, although I have an 8" Newt and the stars are still leave a lot to desire.
5. If you go to the website, it says "up to APS-C" sensor size. Well, I think the APS-C is stretching it. As I said I couldnt get nice stars with 4/3rd sensor and neither with the 533mc or the mm pro. I always have to crop and the 533 sensor isn't very big to begin with.
I'm ok with the Sharpstar CC, although I thought about getting another CC and see it in comparsion.
You are lucky to have 3 Newts and 2 CC/reducer, i have only two Newts and one CC that is 1.0x no reducer, and it is good one only that i didn't make perfect backfocus to have best out of it.
Because all people are complaining about stars, i made myself a plan that i will buy few equipment to be only for stars, for example with refractors i decided to have 4 setup, one of them is only for stars so it is fully corrected and then i never worry about stars issues, i will try to think the same for reflectors too, and then if i buy Nexus or Sharpstar i won't worry about stars much as i will use stars from another setup.
For now i have Meade R8 8" f/5 which is discontinued and i was lucky to have a last piece new from a seller, and GSO 6" f/4, this GSO collimation is bad, so i will try to modify it to fix that, then later i will buy Nexus for it so i can go fast to f/3, maybe i will have good stars with mine, if not then i just have to buy another setup to give me same FOV and use it only for stars and use this f/3 for narrwobanding [and Lum sometimes] only.
