Pete Santangeli, Chris Patel, Paul LeFevre and I (Paul Sterngold) have rescheduled our imaging trip to the Mojave (Afton Canyon) for the weekend of 16.Feb.07 -...
I want to share something I discovered regarding my GM8 mount. I'm interested to hear if anyone else has encountered this problem. I acquired a secondhand but...
Well, the three of us decided last night that it wasn't worth staying a third (for me) or second night at Afton Canyon. The clouds were pretty rapidly...
What camera did you use? (apologies if I missed in the text somewhere.) _____ From: norcal_ai@yahoogroups.com [mailto:norcal_ai@yahoogroups.com] On Behalf Of...
It's a Starlight Express SXVF-M25C. 6 megapixel single shot color. The pixels are really small for this scope, so given that and the poor seeing, everything is...
Thanks Greg! I'm continuing to add images to that url: www.santangeli.net/afton I added a reasonable rendition of the Siamese Twins up there tonight. Pete ... ...
Pete Santangeli, Darren Hutchinson and I are planning an imaging trip to Carrizo Plain on Friday and Saturday nights, March 16th and 17th. We would be happy...
Back in January, I joined a small group of people down at Willow Springs for a nice (but windy!) night of observing and imaging. I've finally gotten around to...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the norcal_ai group. File :...
norcal_ai@yahoogroups...
Mar 9, 2007 5:23 am
183
I added a file to the files section: noise_flats.pdf it shows the total noise in a corrected (calibrated) image as a function of total signal level and the...
this was discussed on the ccd-imaging-technology group a few days ago. I am posting here because there may be interest in this. rdc From: aplanatic@... To:...
in many cases the read noise is simply insignificant as relating to the overall signal to noise in an image with bright features. But if you are imaging faint...
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norcal_ai@yahoogroups...
Mar 9, 2007 5:31 am
187
I uploaded another file into the files section ( s_n_comparison.jpg ) that shows the appearance of images with varying signal to noise ratios a rule of thumb...
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Mar 9, 2007 11:54 pm
189
in the files section is a file called pixel_sampling.pdf it is work in progress but is a somewhat different approach to determining the optimum pixel sampling...
I'm considering a camera upgrade. Initially I was considering modifying another DSLR - 350xt (8 megapixels; currently I'm using a 300D which is 6 megapixels)....
Hi Pete, I was looking over these images and was very impressed to notice small PN (NGC2438 I think) in your M46 image at about 7:30 in the main cluster. I...
I did a bit of imaging last night; couldn't resist the dark and clear sky, and warmish temperatures I was pleased to find good seeing too. Well good until the...
Sorry, Jeff, I'm using old technology- an SBIG ST-8XE. But I'll be interested to follow your researches, decision and outcomes. Cheers, Paul Sterngold ... ...
there have been a lot of upgrades and enhancements/patches etc applied to the STLs since they first shipped so if you decide to buy one of them, especially a...
We're gonna try next month. Cheers, Paul Sterngold ____________________________________________________________________________________ No need to miss a...
As I said recently I am posting an analysis as to optimum pixel level sampling. This analysis is a bit different than the typical approach because I am...
Wow, looks great. I love my M25. but I'd love it more if it were cheaper! Pete _____ From: norcal_ai@yahoogroups.com [mailto:norcal_ai@yahoogroups.com] On...
i've not heard of those guys looks interesting i wonder how it performs parametric-wise? ... From: Peter Santangeli To: norcal_ai@yahoogroups.com Sent:...
I need help diagnosing a problem: bands through my images. My camera was fine with no signs of banding at Calstar in September. Then at Afton Canyon last ...
Why dont you think these are electrical in nature? My vote would be for inverter noise. I'd run the system on straight AC power (from the house mains), and see...
... Previous experiences with electrical noise showed moire-type patterns between rows. These bands have no such patterns. However, see Ray's response and my ...
Hi, I'm new on the list, but old on CCD imaging (since '78 @ Lick). Any banding like this is certainly related to electrical effects. It could even be ...
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