hunting all the messier objects astrophotography with a 40 web cam
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Hunting all the Messier Objects Astrophotography with a $40 Web Cam. James Maughan RVAS February 21, 2005. My Odyssey 8. 8” Dobsonian from Coulter Optics. Progress towards 110 Messier Objects. Long Exposure Photographs- Camera Only. - 16 sec maximum exposure - f/1.8 - 40mm equivalent

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hunting all the messier objects astrophotography with a 40 web cam

Hunting all the Messier ObjectsAstrophotography with a $40 Web Cam

James Maughan

RVAS

February 21, 2005

my odyssey 8

My Odyssey 8

8” Dobsonian from Coulter Optics

long exposure photographs camera only
Long Exposure Photographs- Camera Only

- 16 sec maximum exposure

- f/1.8

- 40mm equivalent

- manual focus

modifications for telescope

Modifications for Telescope

- modified mount from 4” Newtonian

- eyepiece projection

- 4 to 8 sec exposure

asteroid 2002ny40 flyby 18 aug 02
Asteroid 2002NY40 Flyby, 18 Aug 02

- 8 second exposures, - separated by 30 sec

meade 10 lx 50 and logictech quickcam 3000
Meade 10” LX-50, and Logictech Quickcam 3000

- unmodified, 1/30 sec exposure, direct projection

- K3CCD and Registax software

modifications for longer exposures
Modifications for Longer Exposures

- modify circuitry to bypass 1/5 sec exposure limit

- K3CCD computer control

requires accurate polar alignment
Requires Accurate Polar Alignment

- K3CCD to calculate RA and dec drift

- Excel program to calculate angular misalignment, correction needed

- adjust set screws as needed

periodic error in lx50 drive
Periodic Error in LX50 Drive

- Limits practical exposure length to appx 30 sec

slide30

Thank You!

James Maughan

www.maughan1.com

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