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RICHARD COFER

VdB 141 Ghost Nebula

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Posts Made By: Roland Christen

February 20, 2007 08:44 PM Forum: CCD Imaging and Processing/Deep Sky

COLLAGE

Posted By Roland Christen
You're really getting the most out of that little scope!

Rolando

February 22, 2007 05:15 PM Forum: Pictures of Me and My Telescope and........

Cute "little" original AP130 F6

Posted By Roland Christen
That looks like one of the 5" F6 triplets we first made before ED glass became available. That goes back 20+ years. Glad you are enjoying it.

Rolando

February 22, 2007 09:41 PM Forum: Refractors

What in the world are these three dark lanes!

Posted By Roland Christen
I took your image and labled the three effects that are shown (glow from turned edge, spacer shadows and diffraction from each of the 6 edges of spacers).

Rolando

March 10, 2007 10:06 PM Forum: Astro-Physics

A new antireflective coating?

Posted By Roland Christen
It's not new. It's an old concept, and unfortunately it has no real application to amateur optics. It's more for things like photocells.

Modern multi-layer coatings can get surface reflectivity down below 0.2%. There is not one particular value of index for a multi-layer coating. It is made of alternating high, medium, and low index materials. The layers are matched to the glass index.

Rolando

March 16, 2007 12:18 AM Forum: CCD Imaging and Processing/Solar System

Newbie Saturn - More or leave it? [edited]

Posted By Roland Christen
Excellent!

Rolando

March 19, 2007 05:04 PM Forum: CCD Imaging and Processing/Solar System

Jupiter and Io, 14th March 2007

Posted By Roland Christen
The image looks 3d!

Rolando

March 19, 2007 09:21 PM Forum: Astro-Physics

155 and 160 Telecompressors

Posted By Roland Christen
>>Can you provide a telecompressor for either of these older AP telescopes, a 150 mm f/12 or a 152 mm f/9?>>

The 2.7" 0.75x Telecompressor will work fine for those scopes.

Rolando

March 22, 2007 03:55 PM Forum: CCD Imaging and Processing/Solar System

Saturn with White Spot

Posted By Roland Christen
Hi Jim,

I did some radical processing on your image to enhance the spot (Photoshop layers, Multiply, USM, Screen etc).

Rolando

March 23, 2007 10:12 PM Forum: CCD Imaging and Processing/Deep Sky

Byebye Horsey

Posted By Roland Christen
I stacked another image from my friend in France with mine. He has the same scope as I do. This increased the signal to noise and allowed me to really stretch the low brightness areas to bring out very faint detail. The equivalent exposure is approximately 9 hours of H-alpha.

Rolando

March 30, 2007 09:55 PM Forum: CCD Imaging and Processing/Solar System

3 second waltz

Posted By Roland Christen
That is really neat!

Rolando

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