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RICHARD COFER

VdB 141 Ghost Nebula

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Posts Made By: Roland Christen

August 21, 2013 10:49 PM Forum: CCD Imaging and Processing/Deep Sky

Testing a 12" Astrograph

Posted By Roland Christen
This is a central crop of a test object that I like to use when testing scopes at the AP observatory. Image taken with a 12" astrograph at F8 using a 16803 FLI camera. 10 minute exposure on a slightly hazy night. I processed it in MaximDL to bring out the faint stars without blowing out the detail in the core.

Rolando

September 5, 2013 07:55 AM Forum: CCD Imaging and Processing/Deep Sky

Dark sky in Hawaii

Posted By Roland Christen
My wife and I spent a week on the north part of the Big Island of Hawaii, in the Kohala mountain region. The skies there are incredibly dark and transparent with almost no light pollution straight up and just a small amount 35 miles to the south in Kona. In fact we measured the light pollution level to be mag 21.36, which is almost identical to what it is on Mauna Kea on the 9000 foot level.

So here is a Milky Way shot, a single 30 second exposure taken with my Sony NEX-7 camera with wide field lens set to 18mm at F4. The camera was attached to my little Vixen Polarie sidereal tracker with only perfunctory polar alignment.

Rolando

September 23, 2013 07:03 PM Forum: CCD Imaging and Processing/Deep Sky

The Eagle sees its prey

Posted By Roland Christen
H-a exposure of one of our favorite summer nebulas shown in a different way.

305 R-H astrograph and QSI683 ccd camera. 9 x 10 minute subs.

Rolando

September 23, 2013 07:04 PM Forum: Astro-Physics

The eagle sees its prey

Posted By Roland Christen
H-a exposure of one of our favorite summer nebulas shown in a different way.

305 R-H astrograph and QSI683 ccd camera. 9 x 10 minute subs.

Rolando

September 23, 2013 11:13 PM Forum: CCD Imaging and Processing/Deep Sky

M81-82 intergalactic

Posted By Roland Christen
Lots of strange stuff in the empty universe between the galaxies. 160EDF refractor at F5.7, STL11K camera, 150 min exposure.

Rolando

September 26, 2013 08:10 PM Forum: CCD Imaging and Processing/Deep Sky

Cave Nebula

Posted By Roland Christen
Had a reasonably clear night last night. Exposure time 4 x 20 minutes of H-a, camera QSI683, scope 305 F3.8 R-H. 1/2 size image.

Rolando

September 26, 2013 08:11 PM Forum: Astro-Physics

Cave Nebula

Posted By Roland Christen
Had a reasonably clear night last night. Exposure time 4 x 20 minutes of H-a, camera QSI683, scope 305 F3.8 R-H. 1/2 size image.

Rolando

October 2, 2013 11:04 PM Forum: CCD Imaging and Processing/Deep Sky

Uranus and Moons

Posted By Roland Christen
Shot last night around midnight. 1 sec exposure, 305F3.8 R-H, QSI 683 LRGB

Rolando

October 2, 2013 11:06 PM Forum: Astro-Physics

Uranus and Moons

Posted By Roland Christen
Shot last night around midnight 305 F3.8 R-H, QSI 683, 1 sec exposures LRGB

Rolando

October 3, 2013 01:09 AM Forum: Astro-Physics

M29 - a colorful cluster

Posted By Roland Christen
Short 3x30 second LRGB exposures with 305 F3.8 R-H and QSI 683 camera last night. Lots of colorful stars in this open cluster buried in the Milky Way.

Rolando

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