Quote:
Originally Posted by dvj
I need AstroDon to loan me a 3nm filter to test from my urban location. Not quite ready to spend the $$$.$$ on it to be disappointed. I am smack in the middle of streetlight central from my home, and very limited to 600s exposures with the RH200 and 6nm filter. I have an old 3nm Custome Scientific filter with 50% transmission that I can run some tests. That transmission is far below Don's filter.
j
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You will not be disapointed. Astrodon Filters are 3mm of Striae free fused Silica. The quality in my humble opinion makes them a bargain!
I have not had gradients due to a full moon with 3nm NII and SII and HA with 480s exposures. It is noticeable with 3nm OIII.
Bert