Hi,Luc I've got a problem with stacking D200 cameras' RAW files. The area where the amplifier glows the severe turned into green patches in autosave images. ...
Hi (Andy?), I don't think this is because of hot pixel detection and removal. Indeed a hot pixel needs to be alone (no other hot neighbors) to be detected and...
Are there some basic rules of thumb for setting the value of Sigma for either median or clipped? And how about number of iterations? I have 200 or so light...
Hi, I haven't been really motivated to process some of my backlog. This one had been sitting on the editing table for a while so I figured enough is enough,...
Stephen, the math is a little mind bending so I haven't tried to understand it too much. There's no such thing as 'real data'. As soon as outliers are rejected...
Very nice and deep image Sander. I don't think the halos are very distracting, any idea what is causing it? Josh ... [Non-text portions of this message have...
Thanks i guess, but I can't say that was much help - sorry ;) I was trying to avoid doing multiple runs with 200+subs and was therefore hoping for some past...
To build on what Sander said, yes, the purpose of sigma rejection is to remove outliers but not to remove those lying within the expected range of uncertainty...
There is possibly "over analysis" going on here ;). I'm going to turn this on its head and point out that the best use of Sigma Kappa stacking is to remove...
I like this train of thought. However, i still think that there is a rule of thumb for setting Sigma and in my opinion its based on the sample size. Counter...
Here is a new photo of the Rosette Nebula taken Friday night. 1.5 hours, Modified Canon 350, through a W/O FLT 110 APO, more details are with the photo. ...
I am having a problem with flats. I have an QHY8 camera and a Williams Optics Megrev 72. If I stack a number of images taken with the above combination, but...
Hi, So you have severe ampglow, but it should not lead to that small patch of pixels that seems to all have the same value. Can you post one light frame to...
Have you included bias frames? You will need them to get proper flat correction. Blair MacDonald (from my Blackberry) ... From: "pjmb_uk" <pjmb_uk@...>...
Hi, I have made some tests and can only guess what is happening. Anyway, the light frame calibrated using the single dark frame does not have any problem (no...
I Stephen On 2010-03-06, at 6:17 AM, "tony_p_cook" <tony__cook@...> wrote: There is possibly "over analysis" going on here ;). I'm going to turn this...
I've been trying to calibrate a DSLR image taken using Nebulosity for a friend of mine. His raw files are stored in fits format and DSS seems to bomb when...
Hi, Perhaps the connection error prevents you from downloading the master dark frame. But forget it anyway, these set of files are way too big for me to...
Thanks Sander I'll upload them tonight. It seems I had to turn alignment off then it calibrated fine. Any issues with just using a single light frame for ...
Hi Blair, I have redone the bias frames and it has substantially solved the problem. I am left with a residual background colour change which is not a serious...
Tom, Thanks for posting your Rosette, it looks good. I have a few questions/comments... Is the FLT-110 you are using the model with the TEC objective? How was...
Hi Blair, ... Might be. Can you check with the latest beta please (no install needed, just unzip and run)? And BTW I would like to check with the FITS file...
Its been a pitiful winter, in fact one of major discontent. The last few days have seen almost perfect seeing and transparency over much of southern UK, and I...
Oops, it seems it's a active link.... This is the directory, and go to the first file then download from the page. I'm not sure if the languange will...
