Question about ASI 071 MC Pro and UV-IR Cut filter

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efiedler
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Question about ASI 071 MC Pro and UV-IR Cut filter

Post by efiedler » Wed Sep 12, 2018 3:41 am

Sean:
Hello !!! I´ve been reading that some people recommend to use a UV-IR Cut filter with the ASI 071 MC Pro camera, but others don´t. What are the advantages/disadvantages to use this filter0? What do you recommend/think? Will you get better and pinpoint stars and colors?

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Sam
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Re: Question about ASI 071 MC Pro and UV-IR Cut filter

Post by Sam » Wed Sep 12, 2018 10:20 am

it is useful if you use one refractor which has achromatic error
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Konihlav
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Re: Question about ASI 071 MC Pro and UV-IR Cut filter

Post by Konihlav » Fri Sep 14, 2018 10:25 am

even reflecting astrographs do have certain amount of glass in the optical path - I mean, the field/coma correctors etc. That is refracting optics - that brings the problems with IR wavelengths. For DSO imaging you risk bigger and bloated stars if not using an UV/IR cut filter...

I think ZWO doesn't add a typical UV/IR cut filter in their cameras as they started as a planetary cameras manufacturer. For planets, it can make sense to have the IR wavelengths to pass so as you can filter the light yourself - either want it - for e.g. Moon imaging with an IR pass filter or you do not want it - you add the UV/IR cut.

But for DSO imaging, there's very, very little use cases for imaging WITHOUT an UV/IR cut filter.

I have mine permanently installed :-)

My opinion: in a color camera meant for DSO imaging there should be an UV/IR cut filter installed right away out of the box, not just AR-AR filter... (or whatever is there).

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Support@ZWO
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Re: Question about ASI 071 MC Pro and UV-IR Cut filter

Post by Support@ZWO » Mon Sep 17, 2018 3:34 pm

It's hard to choose what is the standard filter on camera. We considered a lot of useage of our camera, not only astrophotography.
I will bring your suggestion to our development department, if they could consider about IR-CUT filter in the further.
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mslehv
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Re: Question about ASI 071 MC Pro and UV-IR Cut filter

Post by mslehv » Fri Sep 28, 2018 4:41 am

I obtained a dramatic improvement in image sharpness and star size with the use of ZWO's IRCUT filter. For the price, it's a fairly inexpensive experiment.

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Support@ZWO
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Re: Question about ASI 071 MC Pro and UV-IR Cut filter

Post by Support@ZWO » Sat Sep 29, 2018 2:59 pm

mslehv wrote:I obtained a dramatic improvement in image sharpness and star size with the use of ZWO's IRCUT filter. For the price, it's a fairly inexpensive experiment.
Thank you for share!
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