I have got it to work now, but there seems to be a bug in the WinRoddier 2.2 ... If I open the intrafocal and extrafocal .fit files under the "file" menu, then...
Steve When you use the "open images" routine, it automates some steps for you. If you open the images manually, you must then.. "Extract disks", "Co-centre ...
Thanks Mark. It works great now. The only thing I had to do differently from your instructions is that after I do the manual calculations by manually clicking...
Artificial star made from a white LED torch light, aluminium foil, extention tube, black flocking paper baffle and a 4mm orthoscopic eyepiece. Distance 12m. ...
Very nice! I would love to test my 80FD but I honestly have not had the time to figure out how. I have a Canon 20D, is it possible to test my WO 80FD with a...
... Sure. If you have tracking, just pick a bright star, put it in the centre of the viewfinder, and make a range of exposures at a medium ISO from, say, 2 sec...
Two issues: Polaris is a double. If you defocus so that the dimmer secondary star is in the defocus test ring, your results will not be valid. Second issue is...
... Subsequent to the above post I have determined that there was a systematic error in the mathematical algorithm used to calculate the RMS and Strehl ratio...
All this work you've been doing to compare interferometry to Roddier is really interesting Mick. Thanks for all the work you've been doing and sharing. It...
... Thanks for the encouragement. Previous posts have indicated that questions have arisen about correlation of analysis results between different versions of...
Group - terribly sorry about the multiple posts of the same message; problem with my ISP (Comcast); hope it's fixed now. Redundant message can certainly be...
Group - for the benfit of any members who might be tempted to experiment with averaging of Zernike coefficients from Roddier, I have written a small Windows...
Group - as mentioned in post #612, I did take a set of six additional image pairs for use as the 8th Roddier test on my 10 inch f/6 Newt. The pairs were...
Hi Mike, Sorry if you've already covered this: I'm new to the forum. 1) Looking quickly at your Roddier images(files: Newtonian 10 inch). I notice two things....
... Chris - thanks for the interest and the comments/questions. I try to make the intra and extra images the same size as closely as possible. The target...
You've done a lot of work nice work. Very interesting. One thought would be to look at something like abberator and see if it can reproduce the actual out of...
Re. the caustic comment (no pun intended!) by Chris, assuming 5.6 micron pixel sizes, 100 pixels correspnd to 0.56mm image size. At f/6, this means that this...
... Mr. Gani - thanks for the interesting suggestion. A diligent search using Google on "caustic zone" has turned up only one expression for the length/width...
Hi Folks, We discussed image size back in 2007 and ran some tests. The recommended image sizes are fine. At 3.4mm beyond focus at F6 focus you are about 20...
Hello Group, I am trying the Roddier software on images from my 13" F4 Newtonian. So far I get a crash when I try to open the images. Images are edited in...
... Gert - I suggest downloading IRIS (freeware) and, after processing and saving (presumably as .FIT) in AstroArt, load into IRIS and immediately save as...
Group - here is a hopefully interesting question for the collective wisdom: Background: I have been actively considering the construction of an "indoor...
Hi, Keeping in mind that I haven't done anything with Roddier : - Can the 2120 be set up on something like Polaris and have it's SA characterized by Roddier?...
... From: m_hollimon To: roddier@yahoogroups.com Sent: Saturday, June 06, 2009 6:26 PM Subject: [roddier] Artificial Star Question Group - here is a hopefully...
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