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Attach Flat73a to Sharpstar 94 EDPH with 2"-to-M63 adapter?

Astrophotography Refractor
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#1 turings.enigma

turings.enigma

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Posted 11 April 2021 - 08:05 PM

I have two setups:

1. William Optics Zenithstar 73 + Flat73a flattener + ZWO ASI 2600mm pro

2. Sharpstar 94 EDPH + x0.8 reducer + ZWO ASI 2600mm pro

 

I usually shoot with setup 2. However, I would like to get a longer focal length. So I am considering attach Flat73a (which does not reduce focal length) to Sharpstar 94 to get the original focal length (517mm, f/5.5). Sharpstar 94 has M74 threads, but Flat73a has M63 threads. The only adapter I can find in the market is 2-inch push-in to M63.

 

Questions:

1. Will I get good result with Sharpstar 94 + 2inch-to-M63 adapter + Flat73a + ASI 2600mm pro?

2. Will the 2" adapter reduce the image circle of Flat73a considering I am using ASP-C camera?

 

Specs:

Flat73a: https://williamoptic...-flat73-for-z73

Sharpstar: http://www.sharpstar...n/edph/329.html

2inch-to-M63 adapter: https://williamoptic...for-p-flat6aiii




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