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Which ASI224MC Filter to use?


ian_bird

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Quick question. I have an ASI224MC camera which does not have an IR cut filter built in and is IR sensitive.
I also have the IR-Cut and the IR-Block filters.
My question is which is better for the following:
Moon at night.
Moon during the day.
Planets at night
Planets during the day.
I'm guessing that the IR Block would be the best for the day time usage - but does anyone have any advice?
Cheers.

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I use an IR block if I want colour images (day or night):

Jupiter_204836_g4_b3_ap22RS6b.jpg

If I want a B&W IR image I use an IR pass filter:

Jupiter_200608_g3_b3_ap22RS6.jpg

So far I have not used the 825nm recommended by ZWO. With my Baader IR-pass (670nm) there is still a difference in transmission between the three colour channels, as can be seen from the graph from ZWO

QE-ASI224.jpg

I therefore get some Bayer patterns I do not want. The ZWO IR-pass filter which only passes wavelengths longer than 825nm should not have this issue. Even with the 670nm bandpass you can get decent results as the image above shows. I am getting a the ZWO 825nm version, however.

 

 

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