I just got a LRGB set of Antlia V-Pro filters (1.25") and put them in my PlayerOne filter wheel.
I put my flat panel on top of my telescope and I ran the Nina auto exposure flat wizard and it came up with the following exposure times for my filters:
L: 0.60 seconds
R: 6.13 seconds
G: 1.88 seconds
B: 2.51 seconds
Now bear in mind this is a constant brightness light source from a flat panel.
I would expect all 3 RGB Antlia V-Pro filters to have roughly the same exposure time to reach 50% ADU since their bandwidths are fairly equal in size.
Do other people experience the too or do I have a bad R filter?
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I think this is some quirk of the QE/sensitivity curve of your sensor. They are not uniformly sensitive across the entire visible spectrum. See diagram below I picked off google as an example for the 294MM and 1600MM  |
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I have to expose my Chroma R filter a little more than the others too.
Not only the sensor as mentioned, but how sure are you that your flat panel is sending equal signal across all wavelengths.
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Probably your light source. Doubt it has anything to do with your filters.
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I've got the Player One Ares M Pro   |
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Your assumption that all filters should reach 50% in the same amount of time is incorrect. You need to consider the QE curve of the sensor as well as the light source for your flats. For example, I have the Poseidon-M and Astronomik Deep Sky RGB filters. I use a Gerd Neumann Aurora flat panel. LRGB flats I took: L - 0.30" R - 2.35" G - 0.83" B - 0.71" The variation you're experiencing is perfectly normal. Nothing wrong with your filters  |
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You are looking for a problem where none exists, just start imaging.
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