Hi, I'm one of the moderators here and since you are all so well behaved the job consists mostly of reviewing the first posts of new members to make sure they...
I've just spent half an hour typing the post when it desintegrdated before my eyes. Warning to slow typers - Yahoo has a timeout that will simply ignore you...
Well, this time it SHOULD work. I just wanted to share some observations I had while using WinRoddier 2.2, some people might find it useful. First, current...
I think the easiest way is to save Registax picture as Tiff, open it in IRIS and save as FIT. Works great. Seems like French astrosoftware Gods are using same...
... I think this is a good tip. Once in IRIS, you can do the cropping as well. Yet another program to use, but the results are definitely worth the trouble !...
I used window3 256 (to crop 256x256) to do the cropping. Very easy and fast. Roddier test ROCKS! Thanks bratislav for actively promoting the software! Big...
Dear Roddier community :) Would anyone please explain how do I ensure than my BW modified ToUcam gives a linear response? I usually set gamma somewhere in the...
... ToUcam ... middle ... You can make a linearity test using lights of different brightnesses, where the ratio of the brightness is accurately known. For my...
Dennis, Yes, at least when I use my color ToUcam with K3CCD, gamma=zero seems to be linear. There is also some info at this site where another person gets...
What "Corriger les images" in menu Images does? Most times it doesn't work but when it does I receive some absurdly high Strehl (up to 0.99 fo Meade SN scope)....
What "Corriger les images" in menu Images does? Most times it doesn't work but when it does I receive some absurdly high Strehl (up to 0.99 fo Meade SN scope)....
I am not sure what it does. A BabbleFish translation gives "Correct the images." However, when I try to use this feature I get crazy results, much as you...
Hi zeissnut, Yeah, I figured that it has something to do with correcting images. I don't use it when testing my scope, I was just curious. There are a lot of...
... What it seems to do is register the images (ie put both intra and extra focale star images in the center of the field). ... I have found I can get absurdly...
I don't think it "registers" images. It seems that extrafocal and intrafocals are somehow mixed together. I have a few dust motes on intrafocal but on on...
Hi, I think the cookbook still makes sense, eventhough we nowadays have a new version of Roddier. So in/out focal images around 140 pixels should be ok! ...
I never use intra/extra images less than 100 usually 120-160pix ... [roddier] Re: What Images-Corriger les images does? ... intrafocals are somehow mixed...
... How does one use the "window3" command (or any other command) in IRIS? I can't find a "Command" or "Console" entry in any of the IRIS drop-down menus, and...
Group - I am attempting to apply Roddier analysis to my 10 inch f/6 Newt. Two questions in this regard have arisen: 1. Roddier has an entry field for the...
Hi Mick, ... f/6 ... report a ... Yes. ... effect? My feeling is that the spider will not have much effect. It will show similar patterns on both sides of...
Dr. Biretta - thanks much for the inputs on Roddier and Newts. My initial trials have yielded indications of really bad performance (P-V 1.9, 0.82 Strehl)...
Hello again Mick, I would ignore the P-V=1.9 result. The P-V is extremely sensitive to any small spot on the optic with a large error. It is the same way for...
... Dr. Biretta - thanks again for the useful inputs. I don't remember this afternoon what the RMS was but it was (to me) unspectacular, less than 10. The...
... with ... as ... the ... holding ... Mick, you have to remember that Roddier tests not only telescope in question, but the whole shebang - collimation,...
... Bratislav - I have posted (Files section, folder "Newtonian 10 inch") the intrafocal and extrafocal images for the first set of Roddier tests (two camera...
... Bratislav - I have posted (Files section, folder "Newtonian 10 inch") the intrafocal and extrafocal images for the first set of <<< Out of curiosity since...
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