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Old 04-03-2019, 03:35 PM
JA
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JA is offline
 
Join Date: Oct 2016
Location: Melbourne, Australia
Posts: 2,945
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Originally Posted by JA View Post
I had made a comparison of these together with a Nikon D800 sensor response. I will look for the comparison and post it here later.

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JA
Here is that comparison of the UHC filter & Dual Narrowband filter against the Nikon D800 spectral response. The curves are aligned by eye at 400 and 700nm.

As is evident the peaks are much tighter in bandwidth on the dual narrowband filter (Bandwidth = ~15nm OIII & ~18nm Ha [even less if the D800 response were to be included) compared with the UHC filter(Bandwidth = ~50nm OIII & ~28nm Ha [with D800 response included - brown line line on top graph]). At a fraction of the cost, or perhaps something that one might already have, I would give it a try in the same way as the dual narrowband filter is used on colour cameras, for "narrowish" - band imaging or of course stick to "normal" colour imaging with it to remove some light pollution.

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JA
Attached Thumbnails
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Last edited by JA; 04-03-2019 at 03:50 PM.
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