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Need for IR/UV cut window on ZWO asi174mm camera

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#1 MVoltae

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Posted 11 September 2021 - 12:02 PM

My question relates to the advisability of removing the IR/UV cut protective window from my ZWO AIS174mm camera.  To bring my ZWO asi174mm to focus with my PST Coronado 40mm solar telescope, I had to remove the camera’s IR/UV cut protective window in order to fit a short nosepiece with a 2X Barlow on the end.  This solution will be familiar with many of you reading this post.  I was never satisfied with the result and eventually sold the PST.  I now have a Quark chromosphere and will also pair it with the ZWO asi174mm.  My question is whether to reinstall the camera IR/UV protective window or rather to leave it off.  Since my Quark setup includes a Baader UV/IR filter mounted on the front of my diagonal, I see no need for a second such filter mounted in my camera. I realize that the camera’s filter might help keep dust off the sensor, but, in fact, the filter is a dust trap itself and difficult to keep clean.  The little bit of dust that I see on the sensor can be cleaned to a minimum and any remaining motes can be dealt by taking a FLAT. Would appreciate any comments and advice.



#2 briansalomon1

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Posted 11 September 2021 - 04:27 PM

You don't need redundant UV/IR cut filters.


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#3 MalVeauX

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Posted 11 September 2021 - 05:14 PM

Hi,

 

Like Brian pointed out, it's not needed. You already have a UV/IR block filter in the imaging train. And the blocking filter of your Quark blocks all that two. So this would be the third UV/IR block in your imaging train, if you re-installed the plate on your IMX174.

 

You're good to go. waytogo.gif

 

Very best,



#4 MVoltae

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Posted 11 September 2021 - 05:36 PM

Thanks, everyone.  


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