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When I purchase the Carton
100mm f/13 achromat from Sheldon Faworski, it came mounted in an
aluminum cell, which I refer to as the "Front Cell". But it did not
come with the rear section to mount the lens to the main tube, so it
had to be fabricated. I was blessed when fellow amateur astronomer
and good friend Brian Choin offered to make the rear cell for me
after I was initially considering making it from wood. Brian charged
me only $60.00 to fabricate the piece from a solid 6" OD x 3" L
billet of T-6061 aluminum. The rear cell will accommodate the front
cell holding the objective and the dew shield. I will also
incorporate an exposed transition rim that separates the dew shield
from the main tube. In this shot the billet is held ready for
milling in the chuck's jaws of Brian's metal cutting lathe. |
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