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Do you need to remove sensor window to shoot UV?
I was thinking of getting a Bader Venus filter to play with, but I know that sensor windows sometimes have UV blocking built in.
I'm using an ASI 290 Mono, and as far as I can see, the response at those wavelengths (350nm) is only around 25% of it's maximum sensitivity, which seems to peak more in the red.
Is this just a natural effect of the sensor or is the sensor window coated to reject these wavelengths?
I guess Venus is a pretty bright target (!) but still...
Cheers
Markus
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