I'm indecisive between these two.
I use an F/5 Newtonian with 1000mm
I use an F/5 Newtonian with 1000mm
Help with choosing a coma corrector
Baader MPCC or Sharpstar's 0.95x reducer?
20% (3 votes)
80% (12 votes)
Baader CC is not that great. Its more sensitive to tilt. 0.95 reduction is cool too 
f 4,75
f 4,75
Based on this: https://www.astrofotoblog.eu/?p=856 I chose the Explore Scientific CC. It has been working fine for me, though finding the correct back spacing is nor that easy, as it varies some mm with the focal length of the telescope (this may be the case for other CC's too?). It does increase focal length by x1.07, so if that is not wanted, another option may be better. The Baader one gets consistently mediocre reviews, but I have no first hand experience.
BR
Morsing
BR
Morsing
Helpful Concise
Starizona Nexus 0.75x hands down!! i love mine!!
Aris Pope:
Starizona Nexus 0.75x hands down!! i love mine!!
That thing is amazing! But expensive
Marc Fischer:Aris Pope:
Starizona Nexus 0.75x hands down!! i love mine!!
That thing is amazing! But expensive
Yes but worth every penny. https://starizona.com/products/starizona-nexus-0-75x-newtonian-focal-reducer-coma-corrector
Aris Pope:Marc Fischer:Aris Pope:
Starizona Nexus 0.75x hands down!! i love mine!!
That thing is amazing! But expensive
Yes but worth every penny. https://starizona.com/products/starizona-nexus-0-75x-newtonian-focal-reducer-coma-corrector
Yes. Here in germany 300€ more expensive
Aris Pope:
Starizona Nexus 0.75x hands down!! i love mine!!
Is the Starnoza Nexus 0,75x a good coma corrector for an F5 telescope? (150/750 here)
I love my Nexus, and I also have no issues with my HRCC02. Starizona makes the nexus without the stop collar also, to give more inward travel for people that need it, like dslr users normally.
I think the Nexus is the best, maybe I should save money for it because it's about $190 over my budget. It would give me 750mm and F/3.75 which is really nice.
According to this FOV calculator website, this is how the Pleiades and Orion Nebula will be framed with my camera.
The purple is uncropped full-frame.
The the light blue is with a 1.6x crop (which I will use).
Below is the same framing size, but with the Orion nebula.
Overall, I really like the Nexus.
According to this FOV calculator website, this is how the Pleiades and Orion Nebula will be framed with my camera.
The purple is uncropped full-frame.
The the light blue is with a 1.6x crop (which I will use).
Below is the same framing size, but with the Orion nebula.
Overall, I really like the Nexus.
Problem with M54 extender and coma corrector.
I have a TSFMA360 focuser that I want to use with a TS 1.0x coma corrector for Newtonian telescopes, so that the corrector can be screwed into the focuser. I have an adapter to be able to screw it in.The problem is that, because the drawtube of the f...
Relevant - discusses coma corrector usage with Newtonian telescopes and focuser compatibility issues.