I have found with all the ccd optical train, especially when using a c14and st7 that .63 is tough enough let alone 3.3 R/C For the .63, I went to a VSE focuser...
20310
Mike Dodd
doddm2001
Dec 1, 2003 1:59 pm
Can someone suggest what part of my 9-1/4" Celestron SCT is causing the horizontal rays from Alnitak in my Horsehead image? Please see: ...
20311
Luc Debeck
ldebeck
Dec 1, 2003 3:54 pm
Hi, I processed an image of M63, called,"the Sunflower galaxy" in Canes Venatici. MX7C was used and 20 cm F4.4 Orion. Exposure time 15x25sec with only the...
20312
Yahoo - Wodaski
rwodaski
Dec 1, 2003 5:03 pm
The focal reducer is a very likely suspect, as is any part of the focuser. The baffle tube and lots of other surfaces are also candidates. The SCT design is...
20313
Dennis Persyk
dennis_persyk
Dec 1, 2003 5:27 pm
Hi Mike, The veiling glare around Alnitak is not bad for your scope. I had to crop out Alnitak in many of my B33 images with my LX-90 to get acceptable...
20314
billypatt
Dec 1, 2003 5:49 pm
Marc Huber & I shot this target from two different locations the same weekend of 9/27/03. The galaxy is dim so we decided to try combining the files to...
20315
Roger Hamlett
ttelmah
Dec 1, 2003 7:10 pm
... Too far from the CCD chip. ... You will allready be using a compressor that is more extreme than F*.63. The reduction acheived by a compressor, is...
20316
uwpf23
Dec 1, 2003 7:46 pm
Hi Roger, Thanks very much for your help on this. That is the same thing that I (being a CCD novice) had concluded--too far away from the CCD chip. I'm...
20317
Randy Nulman
randy_nulman
Dec 1, 2003 9:30 pm
Hi Tom, I can't answer the question on whether you have enough back focus for a TCF-s (maybe Ron or someone else knows). All I can tell you is that before I...
20318
Yahoo - Wodaski
rwodaski
Dec 1, 2003 10:22 pm
The MN-56 has extremely limited back focus; a RoboFocus would seem to be the only choice, and it will require some thought to come up with a good solution. The...
20319
justin_yaros
Dec 2, 2003 12:44 am
I'm considering purchasing an AO-7, and I'm hoping to get some advice on whether the improvements over normal guiding are significant and how difficult it is...
20320
jybeninger
Dec 2, 2003 1:19 am
Hi, I have a LX200GPS 12" and ST8. Bad seeing most of the time, high altitude haze and light pollution. I spent months training drives, PEC, adjusting...
20321
justin_yaros
Dec 2, 2003 1:26 am
Thank you Jean-Yves. That sounds encouraging. Justin...
20322
Michael L Cunningham
bogeystar2001
Dec 2, 2003 2:18 am
... Looks like noise in the camera. Is it or the computer close to any power source or radio interference? Michael...
20323
Yahoo - Wodaski
rwodaski
Dec 2, 2003 2:18 am
SCT users see a fairly large improvement with the AO-7 for a variety of reasons, such as mount tracking errors and guiding inaccuracies. The AO-7 solves these...
20324
jbialozynski
Dec 2, 2003 2:24 pm
The other day I used AIP4WIN to process the minima for an eclipsing binary star light curve. I did the advanced calibration and then used the...
20325
justin_yaros
Dec 2, 2003 3:34 pm
Ron - I find that my stars tend to elongate at times, even though I'm getting mostly good pixel values on guiding and got what I assumed was a good polar...
20326
aajohnah
mkeitel2000
Dec 2, 2003 4:03 pm
Took this image at the Chiefland Star Party To much fun since I mistaken my Red filter for my Blue and have no Blue for this image as of now, though I have...
20327
aajohnah
mkeitel2000
Dec 2, 2003 4:05 pm
Took this image at the Chiefland Star Party To much fun since I mistaken my Red filter for my Blue and have no Blue for this image as of now, though I have...
20328
Bob Holzer
holzerinatl
Dec 2, 2003 5:16 pm
That's really beautiful Mark. What's the image scale? Maybe someone can loan you a Blue exposure. Bob ... From: aajohnah [mailto:aajohnah@...] ...
20329
aajohnah
mkeitel2000
Dec 2, 2003 5:35 pm
Bob, Thank you Yeah forgot was taken with a 10Xe camera Image scale is .79 arcsec/pix I was going to get the Blue channel from home when the Moon leaves,...
20330
eisenklein
Dec 2, 2003 5:57 pm
Hi: I know some of you guys use an STV and would appreciate some direction. I have a Tak FS 60-C piggybacked on a classic 10" LX200 f/10. I have a Losmandy set...
20331
Bob Holzer
holzerinatl
Dec 2, 2003 7:36 pm
Adam: I'll be happy to walk you thru the STV, although I have no LX200 experience. Bob ... From: eisenklein [mailto:amstuart@...] Sent: Tuesday,...
20332
Randy Nulman
randy_nulman
Dec 2, 2003 9:52 pm
Hi Mark, That's an outstanding image! I love the way you processed...you were able to show lots of detail without oversharpening...great work. Hope you can...
20333
aajohnah
mkeitel2000
Dec 2, 2003 10:00 pm
Randy, Thank you, not sure how to Sharpen that much did use unsharp mask in PhotoShop, since someone suggested that I use Deconvolution on it and I have no...
20334
Richard Link
rlink88
Dec 2, 2003 10:07 pm
Here is a sad tale of a new CCD imager who apparantly made all the wrong choices. The recommendations I have heard: "Start with piggyback astrophotography;...
20335
Roger Hamlett
ttelmah
Dec 2, 2003 10:23 pm
... You are obviously interested in going for quite 'wide fields'. At least with the ST7, you won't get 'microlens' artefacts, (which can get quite bad on the...
20336
Tim Long
t_p_long
Dec 2, 2003 10:35 pm
Have you considered getting an SBIG AO-7? It works magic on those SCTs and will help to compensate for many of the mount's shortcomings. --Tim...
20337
GREGG KYLE
ccd_st8
Dec 2, 2003 10:36 pm
If you have to adjust your wedge often because you change locations or move your equipment, get a good wedge. I use the Milburn wedge. There are others that...
20338
Lenny Shaffer
lenny_shaffer
Dec 2, 2003 10:38 pm
... As a Nexstar 11 owner I can answer most of your questions I think... *First I would have to say that a second floor porch is NOT the place to start...
