Mark I Second Edition Classical Cassegrain (serial number 2)

 

To see the latest images taken with this instrument click here:

Specs: 45cm f/12.6 (F= 5760mm), f/4.2 primary , 3x multiplier for secondary. Optics and critical mechanicals by Optical Mechanics of Iowa City, Iowa.

350mm back focus

secondary mirror focuser via RoboFocus

Tricolor Narrowband Crab Nebula image: [SII] = Red, Halpha = Green, [OIII] = Blue

Crab Nebula in RGB

18 x 10 minutes

M100 Luminance

1x 90seconds unguided (IMG6303E, Halpha), (first light Feb 4, 2006)

3 x 10 minutes IMG6303E, Halpha: guided via dichroic beam splitter/AO7/ST7E

4 x 20 minutes IMG6303E, Halpha: guided via dichroic beam splitter/AO7/ST7E (Feb 5, 2006)

4 x 30 minutes IMG6303E, Halpha: guided via dichroic beam splitter/AO7/ST7E (Feb 7, 2006)

4 x 30 minutes Halpha + 3 x 45 minutes [OIII] IMG6303E camera guided via Lumicon Giant Easy Guider (w/o reducer) and ST7E

 

Collimation tests inside and outside of focus stars. Note chipped primary in these images and in the photographs below

 

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