IC443, RASA 8", 6 hrs (!no filter!)
Photo description / processing
IC443
Celestron RASA 8", F=400mm F/2.2
A test of "what happens if there's no filter at all?" — and here's the answer. It's a mess due to halos.
Interestingly, I then went looking for an anti-light pollution filter with a built-in UV/IR cut that would be suitable for fast systems.
And I didn't find one. There are triband or quad band filters.
Also, you can see here how bad a large APS-C sensor is on the RASA 8" (seems not too bad, though it was promised to be worse).
I deliberately didn't stretch this frame — there's nothing to enhance. This is a technical test of "what happens if..."
Technical information
- Telescope/Lens
- Celestron RASA 8
- Camera
- Player One Poseidon-C
- Mount
- ZWO AM5N
- Software
- N.I.N.A., Pixinsight
- Location
- Софрино
Light pollution
Orange, Bortle 6 zone
- Date taken
Exposure
- 175 × 120″ · ISO/Gain: 125 · no filter ·
Total exposure: 5 h 50 m
Comments
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The Player One Poseidon‑C Pro camera doesn't have a built-in UV-IR cut filter.
This is an example of "how not to do it" and what happens if you shoot without any filters at all, even without a UV/IR cut (which, seemingly, is almost useless).
Kept it as a keepsake.
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