Hi all, I am considering moving from RGB imaging to narrowband, due to severe local light pollution gradients. I currently have an HA filter, which is...
I used an OIII in Seattle, and I found that it is much more likely to suffer from light pollution gradients. There are few sources in the range of Ha, but...
Hi, I do my imaging quite often with a OIII-CCD filter under very light polluted skies, about 300m away from the huge international airport of hamburg. If you...
Hi, I have developed new filters that emply exoctic organic dyes. These filters can mimic costly interference filters. These filtersare about .005" thick and...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Astroimaging_filters group. File :...
Astroimaging_filters@...
Nov 9, 2005 9:58 pm
1027
Hi all--- Does anyone know if astro 48 mm filter threads are the the same [pitch etc.] as as 48 mm as 48 mm film camera filter step-up or -down rings. I want...
the 48mm filter thread is 0.75mm pitch most photographic filters that are in that same basic size range are 49mm filters with the same pitch as I recall. ... ...
I understand you to be saying that you want to use a filter in the optical chain using it as a mechanical element to hold the following equipment. Filter...
hi there, we do have updated www.astronomik.com and www.gerd.neumann.net with english pages for all of our filters and some more products. It might be be ...
last night I finished taking widefield images of the IC405 region. I was using a 150mm f/2.8 Pentax Takkumar 6x7 camera lens stopped down to f/4 with my...
Oh, very nice; very nice, indeed. Any chance we can see the monochrome images for each of the channels? Cheers, Jim Livermore CA ... down to f/4 with my...
Hi all, a lurker here. Been working up to shooting with a 9nm Schuler H-alpha filter and finally got it together - M27.....yeah, I know, ho-hum, but I thought ...
Nice shot! M27 was one of my first Ha targets too. I also used the Schuler 9nm filter but with a C-11 and 0.5 focal reducer. Keep up the nice work. ... From:...
Thanks Rocketman I did some comparative images of M57 last night with a wratten #29, H- alpah and OIII. The differences are striking. It will be enjoyable to...
Dear group, On a beautiful clear moonless night two weeks ago at my new dark sky observatory, I tried out my Astrodon filters for the first time. I chose to...
I like to arrange the filters in wavelength order. if I don't do that, then I use Ha for Red, O3 for Green and S2 for Blue The Hubble folks use the wavelength...
Richard, this is one of the few images that really shows the tennous envelope of nebulosity engulfing the entire assemblage here, very nice! Chris ... down to...
this is in such a great part of the sky but winds up being hard for imaging from my backyard due to trees. I get about three shots just after dark before the...
I think that's a good start but you could work on the processing a bit. Your picture would probably look ok except that I recently saw this totally awesome...
no it was an inferior camera shot from a superior location ... From: astroguy2006 To: Astroimaging_filters@yahoogroups.com Sent: Saturday, November 19, 2005...
... I think the other image was narrow filtered too so even if it was photographed at a darker site it would not make a significant difference. Maybe your...
there's more to a better site than being dark, right Ray? ... From: astroguy2006 To: Astroimaging_filters@yahoogroups.com Sent: Saturday, November 19, 2005...
MW, could you be specific as to how Richard's image could be improved. Frankly, I find your comment a bit off handed, bordering on rude. Perhaps you could...
Sorry, I did not mean to sound rude. I just joined this forum and it was the first image I saw that I could compare to something I had seen elsewhere. I was...
Well, it's cool. Could you provide a link to the image you were referring to? I'm still pretty new to all of this and comparing results is always the most...
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