[ATM] A new Big 21" Dob

["dobson 2005" <dobson.2005@gmail.com>]

Hello,

Here is my latest "monster", a dobson for a 21" mirror, F/D 5.
The mirror is quite heavy, 84 pounds, with a 80 mm thickness, coming
from a parisian optic laboratory.

The structure is a minimalist one (rigidity is based on the cell
square, with a flex rocker, a ring base, a one-ring secondary cage, and
2 over-sized side bearings. There is a removable box for mirror
protection.

The weight of the mount (optics excluded) is 70 pounds.

All pictures are here:
http://dobson.2005.googlepages.com/dobson530focale2630


Pierre Desvaux
Blanzy, France
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