ATM Paracorr at F2.8 ?

["Poul Linnet" <kam1842@vip.cybercity.dk>]

Has anybody on this list used the Televue Paracorr comacorrector with a F2.8
parabolic mirror or have an idea of the feasibility of this?

Has anybody got the OSLO LT data for the Paracorr available?

I plan to make a 10" F2.8 CCD camera with KAF0400 and using the Paracorr as
comacorrector. I hope that varing the distance between corrector and CCD,
combined with an hyberbolic mirror of the optimal conic constant could be
optimized to give a spotsize compatible with the 9 my pixels of the CCD.

Without any prescription for the Paracorr makes it a question of star
testing the combination with a knifeedge and maybe checking the spotsize in
the corners with the CCD camera attached. This shall probably be done many
times during figuring of the mirror. This is not possible outdoor in
Denmark.

I have the plan of using an artificial indoor star, using an 12" dobsonian
with an illuminated pinhole where the ocular used to be. Has that been done
with success by anyone?

Any comments or other testing  idea's are wellcome

Poul Linnet, Copenhagen, Denmark.