Hi All, I was out trying to take LRGB/Ha images last night. What happend is that in the blue and green chanels had LARGE reflections around them. What is the...
My mirror seems to be flopping around more than it used to. I'm worried that the retaining ring may be coming loose. I'd like to pull the primary but I forgot...
If you don't get a reply here, perhaps you can visit the SCT users group. I know I read through a great proceedure once, but I did not save it. The gent had...
Thanks but I found just what I needed on the C-11 Group (go figure! LOL). ... From: Kevin To: Astroimaging_filters@yahoogroups.com Sent: Monday, October 09,...
just discovered over the weekend and has been in a good number of images taken of IC1396 over the past few years, but apparently no one ever noticed it...
... Svengali attributes and magic :-) The hard way: stretch like hell to make everything show up and look over it carefully. when you see something that looks...
Thought I'd share "first light" with my very crude spectrograph; basicall a DSLR shooting into a shoebox with a slit at one end and a diffraction grating...
Just a quick note to report on my preliminary experience with Don Goldman's MOAG-A (link to imaging train below), which allows for use of SBIG's remote guiding...
Thanks for the post Mark, interesting solution. I am surprised you need or benefit from AO guiding on your paramount. What is the with and without comparison...
Hi Richard, your comment about when something looks odd it should be checked out got me wondering about some recent images I took of NGC253 using different...
Hi Frank, yes that image shows the object well, thank you. It is the "star" + red blob combinations at the 6 O'clock position from the center of the galaxy at...
Hi Kevin. I think it helps a bit, most noticeably when the seeing is good to begin with (less than 2 arc sec). I haven't used the AO-L as much as I did the...
Hello All... Please could someone assist me with the thickness spec on the Astronomik Halpha, OIII and SII filters as I will be placing them in a spare...
OK, I should read the messages first!!! I believe all Astronomik filters are 1mm thick so I would like to amend my question and ask the best way to space the...
Hi Bret, our filters are 1mm thick. We do also offer spacers for SBIG and other wheel to fit the mounts for 3mm filters. If you want some, just write a mail to...
Gerd Neumann
gerd@...
Nov 24, 2006 10:38 am
1283
I am checking out some filters and I find one OIII narrowband that is centered on the 501nm but has only weak transmission on the 496nm line. Somebody...
You should have no quibbles. This is why the narrower narrowband filters are centered on the more intense 501 nm emission line. Don Goldman www.astrodon.com ...
"Optec will be introducing soon SII and OIII filters that are parfocal with our LRGB 50mm set. These filters have hard coatings, +90% transmission at the...
Hi, after a couple of years, my Schuler 10nm H-alpha is picking up an oily film. I am concerned using any solvent for fear of hurting the filter. Does anyone...
Hi, does anyone use the low cost ATIK filter support kit? It looks like it may offer more flexibility for easily changing out more filters than the 5 filter...
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