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RICHARD COFER

VdB 141 Ghost Nebula

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Posts Made By: Roland Christen

April 26, 2005 10:00 PM Forum: CCD Imaging and Processing/Solar System

Jupiter by leroi teiva

Posted By Roland Christen
Scary!

By the way, what latitude is French Polynesia? Jupiter must be straight up over there.

Roland Christen

April 27, 2005 02:26 PM Forum: CCD Imaging and Processing/Solar System

Copernicus from 4/19

Posted By Roland Christen
Your images are clean and not overprocessed. The detail in your shot is better than I ever got using the same scope.

Roland

April 27, 2005 04:59 PM Forum: Astro-Physics

The Eagle Has Landed!

Posted By Roland Christen
They are both keepers in my book.

Rolando

April 29, 2005 02:46 PM Forum: Equipment Talk

6" Triplet Refractors

Posted By Roland Christen
>>Takahashi "flourite">>

It's Fluorite (no flour in it).

RC

April 30, 2005 02:32 PM Forum: Binoviewers

Macro pic for checking clear aperture

Posted By Roland Christen
David Simper said:
I am getting just 16mm, less than I expected.
Do I make a logical mistake somewhere or is it so ?

Place a scale right against the entrance aperture and take a picture through the eyepiece end (or look through) to see how much of the scale you can see. This will give the true entrance aperture and will account for any internal vignetting.

Roland Christen

May 4, 2005 03:16 AM Forum: Refractors

Wow!, a 8" F/15 Refractor / lens design question

Posted By Roland Christen
>>I wonder if anyone has any idea if the lens design for synta 6"F/8 would compare to a traditional Farenhoffer (spelling)8" F/15>

A 6" F8 achromat would have much worse color error than an 8" F15 achromat - Fraunhofer or not.

Roland Christen

May 5, 2005 09:00 PM Forum: CCD Imaging and Processing/Solar System

Finally - a night of good seeing!

Posted By Roland Christen
This one has potential. I was out last night also, looking at Jupiter with my 10" Mak and my 160 refractor. My skies were not as steady, but I did see some of what you captured.

Roland Christen

May 6, 2005 03:07 PM Forum: CCD Imaging and Processing/Deep Sky

NGC4631 Whale

Posted By Roland Christen
Thank you all for your kind words. Between my job here and the clouds that constantly roll through, I don't get much of a chance to do any astronomy. Local light pollution prevents any kind of deep sky visual stuff, but the CCD has rescued the sky for me.

I find my time under the stars to be very relaxing, and all stress goes away. Great hobby.

Rolando

May 9, 2005 01:45 PM Forum: CCD Imaging and Processing/Deep Sky

M20 and M8 first light WO 80/480 fluorite triplet

Posted By Roland Christen
>>William Optics 80/480 F6 TMB triplet flourite.>>

FLUORITE!!! No flour in it! F L U O R I T E, derived from the word fluorescence which means a material which emits light of a longer wavelength when illuminated by strong UV radiation.

Roland Christen

May 9, 2005 01:48 PM Forum: CCD Imaging and Processing/Solar System

Jupiter composite (final)

Posted By Roland Christen
Extraordinary detail!

Rolando

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