DreamTelescopes at Yahoo! Groups

Re: Question about CF for tube assemblies

shane@... — Sat, 21 Jul 2012 21:03:12 GMT

Jim, Yes, one of the goals of producing an athermal telescope is the minimization or elimination of focus shifts. "Elimination" is like reaching infinity. It

Question about CF for tube assemblies

gjwcac — Thu, 19 Jul 2012 16:25:33 GMT

If the goal is to minimize focus drift over changes in temperature, what is the optimum configuration for a CF tube assembly? I'm assuming a fully reflective

Re: New: Bubble Nebula

Karel Teuwen — Tue, 16 Nov 2010 10:02:21 GMT

Thank you very much David ! regards Karel _____ Van: DreamTelescopes@yahoogroups.com [mailto:DreamTelescopes@yahoogroups.com] Namens david.fitzhenry Verzonden:

Re: New: Bubble Nebula

david.fitzhenry — Tue, 16 Nov 2010 09:15:42 GMT

That's a beautiful image Karel!! Stars are pinpoints to all corners, star colours look great, good detail and low noise in the nebula with the bubble standing

Re: New: M27

Polaraligned — Sun, 03 Oct 2010 11:47:39 GMT

WOW!! Some of the best images I have seen! Scott From: Karel Teuwen Sent: Thursday, September 23, 2010 11:58 AM To: 'CCD-astro Group' ;

New: M27

Karel Teuwen — Sun, 03 Oct 2010 05:03:53 GMT

Hi all, After the great rendition from Rob posted recently on this list, here is my humble effort on M27. You will find the full resolution and info by

Re: New Images of Bubble and Deer Lick

david.fitzhenry — Sun, 26 Sep 2010 10:59:57 GMT

Beautiful images Mel - nice deep shots! My preference would be the Hubble palette for the Bubble nebula. The only suggestion I would make is that you may

Re: New Images of Bubble and Deer Lick

Karel Teuwen — Thu, 23 Sep 2010 17:15:13 GMT

Hi Mel, Most impressive pictures but my favorite one is NGC7331, it is going very deep !!! Good job on both targets Mel !!! regards Karel _____ Van:

New: M27

Karel Teuwen — Thu, 23 Sep 2010 16:02:55 GMT

Hi all, After the great rendition from Rob posted recently on this list, here is my humble effort on M27. You will find the full resolution and info by

New Images of Bubble and Deer Lick

melhelm — Tue, 21 Sep 2010 16:45:15 GMT

Hello all: I just finished the Bubble Nebula. I tried several different palettes for fun: Here is the standard Hubble palette:

Re: New : 6-panel of the Veil

Karel Teuwen — Fri, 10 Sep 2010 05:58:59 GMT

Hi Mike, No problem for that one print for your own use. Yes, the optics must be very good, but also some credits are going to the spikes who are absorbing a

Re: NEW: M33

Dream Telescopes & Acc., Inc. — Fri, 10 Sep 2010 02:26:30 GMT

Everyone, I like Karel's M27 image, which he has also recently completed. When you click on the

Re: New : 6-panel of the Veil

parabola30 — Thu, 09 Sep 2010 19:45:10 GMT

Karel, Wow. If you don't mind, I might have to make a BIG print of that and hang it on my optical shop wall for motivation! I love the clean star images that

Re: NEW: M33

Karel Teuwen — Thu, 09 Sep 2010 18:34:31 GMT

Thanks a lot Jim for the nice comment ! regards Karel _____ Van: DreamTelescopes@yahoogroups.com [mailto:DreamTelescopes@yahoogroups.com] Namens Jim & Pat Fly

Re: The Soap Bubble and the Wizard

Karel Teuwen — Thu, 09 Sep 2010 18:33:51 GMT

Hi Mel, At first, thanks for the nice comment om my M33 ! Those two NB images are showing a lot of fine details, great work !! Since yesterday the ASA mount is