Hello
This is Cathy Huang from Optolong Optics Co.,Ltd.
As Optolong F2 will coming,if you has fast astronomy equipment,welcome to test our F2 filter,thanks for you
Find astrophotographer to test Optolong F2 filter
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Re: Find astrophotographer to test Optolong F2 filter
I watched it through L-eXtreme and it was totally awesome! I assume this is the correct treatment: https://www.researchgate.net/publicatio ... Evaluation