From: "milton_aupperle" <milton@outcastsoft.com>
Date: October 10, 2010 2:02:57 PM MDT
To: Astro_IIDC@yahoogroups.com
Subject: Re: New file uploaded to Astro_IIDC
Hi Tim;
Judging from the colors, I would say no they aren't IR/UV Blocked.
The Blue's and Greens are getting their color from the Red/IR. Also the CCD tends to see a long way into the IR range too.
You should probably do the "image a G2 star" to help with getting color balance right too for your CCD and Filters.
As to whether Filters wheels versus Bayer color cameras are better, that really comes down to your seeing. 99% of my nights have +/- 6 arc seconds of movement (parts of Jupiter's disk is jumping 10+ pixels between frames even at 60 fps and 2,000 mm fl). There is no real fine detail to capture, so whether I shoot RGB filtered or Bayer it makes no difference. It does make a lot of difference though when you try to RGB align the filtered images, especially if your image has contrast and sharp features.
Ever try RGB filter shooting the moon under mediocre turbulence conditions? Nothing lines up properly because the sharp edges are smeared across multiple pixels.
TTYL..
Milton aupperle
--- In Astro_IIDC@yahoogroups.com, "doobisary" <tjp314@...> wrote:
Hi Alan:
I'm not actually sure! They came with my Meade DSI Pro (1) that I bought at RTMC a handful of years ago. I think I tried to find that out on Meade's website, but I don't think I ever got a firm answer. I have various times put an IR blocker in, when I was using the Meade filter slider on the DSI, but since I got the filter wheel and an adapter to put in place of that silly slider bracket, I haven't tried it.
I did have the saturation set too high in Astro IIDC, I think.
But I think you were right. There's a significant improvement in resolution using a monochrome camera through filters over a color camera. The seeing wasn't good, but the results came out better than if I'd shot with a color camera. I just need a faster monochrome camera for planetary.
-Tim.
--- In Astro_IIDC@yahoogroups.com, Alan Friedman <alan@> wrote:
Hi Tim,
Are the RGB filters you're using blocked for IR/UV?
The colors remind me of a black light poster shop from the 60's!
Looks like you recorded some good detail.
cheers,
Alan
On Oct 10, 2010, at 12:33 PM, doobisary wrote:
Here are the stats for the red file. I don't quite understand why the posted file seems a lot bluer than the processing I did on it. But I'll not worry about it much for this post because it was really mostly a test of the monochrome/RGB image acquisition process. I want to make sure I can and want to do it, before spending the money on a faster mono camera (probably an exhad flea3).
-Tim.
Stats:
=================== File:20101010_052819_U.mov #frames 401 (red)
Monochrome Camera = Model:'Scorpion SCOR-20SOM'
IIDC Format:7 Mode: 0 ClrCode: 5 MaxFps: 8.11 MaxPacketSize: 4080
Camera Display Format: 1628 x 1236 16 bit
CCD Image Left: 0
CCD Image Top: 0
CCD Image Width: 1628
CCD Image: Height 1236
Gamma: 1.00
Brightness: 493
Black Point: 0
Exposure: 66.67 ms
Sharpness Limiting On: 0
Dark Frame Subtraction On: 0
Flat Frame Correction On: 0
Invert Image On: 0
Flip Horizontal On: 0
Flip Vertical On: 0
Histogram Expand On: 0
Binning Off Monochrome
Note: 10"f/6, 2xbarlow, orion filterwheel, scorpion mono, seeing 4/10
--- In Astro_IIDC@yahoogroups.com, Astro_IIDC@yahoogroups.com wrote:
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the Astro_IIDC
group.
File : /Planetary/2010-10-10_05-28-19_U_TJP.jpg
Uploaded by : doobisary <tjp314@>
Description : Jupiter in poor seeing, 10-10-10. 10" f/6 homebuilt Newtonian (including mirror!)
You can access this file at the URL:
http://groups.yahoo.com/group/Astro_IIDC/files/Planetary/2010-10-10_05-28-19_U_TJP.jpg
To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles
Regards,
doobisary <tjp314@>