From: fsm79734@gmail.com

Date: May 21, 2015 10:36:06 AM MDT

To: <Astro_IIDC@yahoogroups.com>

Subject: IR Cut Filter Necessary?

Reply-To: fsm79734@gmail.com

I do only solar imaging, and I'm about to purchase a PGR USB3 camera to use with my Lunt 60mm H-Alpha pressure-tuned solar telescope.  I have a few questions for those of you in the group who do this type of imaging.

First, is an IR-cut filter necessary?  Doesn't the filter in the Lunt already do this?  In my past discussions with vendors, they have recommend them - possibly with the intent of selling me a $73 filter - although I've never done a side-by-side comparison.

Secondly, any thoughts on the PGR Flea3/Chameleon3/Blackfly/Grasshopper3 relative advantages/disadvantages for solar imaging?  All of the above cameras I'm considering are the ~2 megapixel, monochrome variants.  In particular, I've never used a CMOS camera for imaging before, only CCD cameras.

Any suggestions are appreciated - thanks!

-Kevin