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Old 23-01-2018, 10:22 AM
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John K
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Join Date: Sep 2005
Location: Melbourne
Posts: 1,468
New mono camera considerations for a 9.5" f/7 instrument

Hi everyone,

I guess this is another one of these "which camera" threads, so hopefully those that have been there and done that can assist further.

Looking for some recommendations to be used with a 9.5" f/7 ODK scope which will have a 50mm imaging circle and be used with 1.25" LRGB and narrowband filters.

Narrowband will be done from severely light polluted skies using 4.5nm filters and LRGB from dark skies - set up will be portable but potentially left in the same location for several nights.

I do not intend to upgrade my filters and will not change from 1.25".

At a focal length of 1700mm, I don't need a full frame sensor (which the 50mm imaging circle won't handle anyhow) and 3/4 full frame is a nice compromise for Galaxies and Nebula's in my mind at this focal length.

Have played around extensively with all the CCD calculators, and some of the cameras I am currently considering:

* ZWO ASI 1600MM

Pros:
- Can take 1.25" filters
- High QE numbers
- Price

Negs:
- Small sensor
- Small pixels

Strategy: Bin 2 x2 and on excellent nights not Bin

Question: How does the 1600mm perform when binning 2x2 on a 9.5" f/7 system overall and for narrowband?

* KAF 8300 BASED CAMERA

Pros:
- Price
- Medium Sensor
- Larger pixels

Negs:
- Lower QE
- Old Technology
- Will get some vignetting?

Again planning on using a binning strategy as required


* KAI-4022 CCD based camera

Pros:
- Price
- Medium Sensor
- Larger pixels
- Can use 1.25" filters

Negs:
- Lower QE
- Very old CCD Technology

Look forward to recommendations from everyone.

Clear skies.

John K.
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