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...
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 :...
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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 ...
... I've seen electrical noise (i.e. from the inverter) just like those in your image, except in my case they were much brighter, and well defined. It was...
Thanks again to everyone for your help. So far, the suggestions regarding the cause of this problem have been: 1) Ray Gralak - usb interference 2) Paul...
Back on the 10'th I went up to Coe and decided to shoot the running man. I was inspired to do this when Mark commented that he liked the running man section of...
Does anyone know how I can tell whether my sBIG ST-8XE camera is ABG or non-ABG from the serial number? Thanks. SN = 803011142XEA (Maybe X = USB x-model, E =...
take a two minute unfiltered image of orion and you will know Paul Sterngold <psterngold@...> wrote: Does anyone know how I can tell whether my sBIG...
Yeah.. If you're not getting blooming streaks on long exposures w/ a bright star, then its ABG. With the ST7E I could easily get electron overflow with a...
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