M31 & ASI Filter Box

I captured these RAW frames after spending the waste of the time for taking JPEG.I wished LPS-V4 performed enhancing HII regions. I feel it somehow did as expected. Unlike Ha filter, LPS-V4 still creates good RGB color, which allows to simply stack along with HEUIBII light frames. So this is the realistic method for myself as a lady and unskillful astronomer.


BORG 107FL F3.9ED (Prototype) + Cooled 6D, 20 x 2′ with IDAS HEUIBII-52 & 10 x 3′ with IDAS LPS-V4-52, dithered by SS-one KODO/EM10

Now I think it’s the time to more seriously practice using the dedicated one-shot color camera. So I have prepared a following system. The key is a filter box, which allows to change various filters without disassembling the system and re-focusing. IDAS QC is excellent. So I don’t have to worry about the variation of filter thickness. In fact, above M31 was taken without re-focusing between two filters. I didn’t think I had any focusing issue.


Above system’s light path are carefully considered based on the filter thickness. Current all IDAS filters block UV/IR. So works as double duty.

~ by tedishikawa on September 12, 2018.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: