Lurie-Houghton Telescope
First Light

PHOTO: First Light
Here I am with the telescope on the mount ready for first light. The sky and weather was not very cooperative that night, but it was good enough to give the scope a first tryout. The scope was only partly collimated, but initial views were quite satisfying. At high power, slight astigmasism and pinching were visible, but otherwise the focal plane was sharp and flat across the field. No secondary color was visible as it should be for this design. The atmospheric seeing was poor, but the almost full moon was sharp. The defocused defraction rings on stars were almost identical on either side of focus with only a small indication of a turned edge. I plan on using the scope for a few observing sessions before disassembling it for final optical tuning to remove the residual aberrations. During these observing sessions, I'll also learn of any mechanical modifications or improvements that may be necessary. This photo was taken 16 May 2000 with an Olympus D-600L digital camera at Mike's shop.

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Updated: 19 August 2000