From: Perry Holcomb <hpholcomb@yahoo.com>

Date: January 10, 2008 10:19:26 AM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] PGR vs TIS CCDs on Mars

Very nice photos!  However...

Sorry, but I think the TIS result is better.  It looks

less "fuzzier" on the whole.

What's the "white" stuff definitely within the

curvature of the rim from 6 to 9 o'clock in the PGR

cam photo??

It's missing in the TIS cam image.  There is a "blue"

arc from about 12 to 4 o'clock in that image, but it

almost appears beyond the rim.  It's not in the PGR

cam one.

The TIS cam also seems to have better definition on

the right half of the photo.

I'm not sure what sort of processing these went thru,

either, but I would guess the RGB had to be combined

while the color photo from the DFK (doesn't it have an

IR cutoff filter in place, while the DBK series has no

filter?) didn't have to go thru that.  Could that have

made a difference??

I'm a newbie here, but what I sees is what I sees!

Still very nice astroimaging, and I appreciate your

sharing both results with us, Jim!

Perry

--- jimchung2338 <jim_chung@sunshine.net> wrote:

Finally a bit of clearing last night around Toronto

and I still have some issues with collimating 

the Mewlon but here's a quick comparison between my

PGR mono Flea and my new TIS color 

CCD.  I picked up the DFK21F04 mainly for shooting

Jupiter and there promises to be a 

double transit this summer.  Clearly mono is the way

to go for resolution and color 

separation.

http://tech.groups.yahoo.com/group/Astro_IIDC/files/Planetary/MarsCameraCompared.jpg

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