(meteorobs) OT -Question to Cloudbait Observatory.

Chris Peterson clp at alumni.caltech.edu
Sat Dec 20 13:45:17 EST 2008

The order of the filters doesn't make any difference, unless they have other 
properties as well. For instance, if one of them has an AR coating, I'd put 
that one closer to the sensor to minimize internal reflections that might 
distort the image.

BTW, since the main thing you're doing is cutting down the light, why not 
operate the camera at a faster shutter time instead? You still avoid 
saturation, but you get better spatial resolution in your individual frames.


Chris L Peterson
Cloudbait Observatory

----- Original Message ----- 
From: "stange" <stange34 at sbcglobal.net>
To: <meteorobs at meteorobs.org>
Sent: Saturday, December 20, 2008 11:25 AM
Subject: (meteorobs) OT -Question to Cloudbait Observatory.

> Hello Chris.
> Appreciate your thoughts on stacking blocking filters.
> Is their any reason to select which filter should be in front if I use 
> UV & IR?
> It is my intention to take meteor detonation photos using the IR blocking
> filter alone and  taking photos with BOTH filters too for comparison. I 
> will
> try both filters FIRST. Expecting the new PC164C around X-mas. My system 
> is
> down now while I build the housing to fit the new camera, lens, and filter
> dimensions.
> Thanks for any thoughts you or others might have on the leading filter
> preference.
> BTW- I accidently took every photo to the present time with a UV filter
> which was mtd.& left in to size the housing. So we do not know yet what 
> the
> IR filter will do on meteors. :-(
> YCSentinel

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