Group - with moderator permission, I have posted to the Files section, Zernike Coefficient Averaging folder, a brief write-up on some experimentation with...
Hello group. I am just starting and am working through the "cookbook" pdf text. I am using the english roddier 2.2. My laptop runs window XP. I can open the...
... focal length, but when ... parameters, nothing happens. ... obstruction size, but ... there a step I am missing ... Steve - I've been confused by...
This may go along with the recent "getting started" thread, but can anyone here tell me if they've been able to successfully use FITS generators OTHER than...
Bob I used MaximDL to create mine, I do not have to change any headers, just save as a 16bit uncompressed FITS. Are you 'splitting' the colours before saving...
... Mr. Piekiel - I have successfully used IRIS to perform the required FITS conversion: Process in RegiStax, save as RGB separate. Load green plane into...
Hi Bob, I had great problems to. My problem turned out to be I had numbers greater than 32767 in the data. The fits reader can't cope with BSCALE and BZERO ...
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...
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