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[ATM] Klaas Honders Astrograph

Hi (Richard),

I the book "The Schupmann Telescope" the author refers to a design by Klaas Honders of an 6" F2.6 Astrograph. This
seems to be a branchy type telescope with superb performance over a 3 degree field of view. Also it seems that it is very
delicate to construct with tight tolerances over all. I am itching for a new challenge so I decided to make one. Unfortunately the design is made out of BK7 and I think this should be better served with fused silica beacuse of the tight tolerances. I entered the data into oslo, but being no expert I am at loss on changing this design to use fused silica.I know of a very talented person by the name of Richard F.L.R. Snashall that should be up to the task!! How about it, any takers to redesigning.

Regards,

Alfredo

===================================

W "Kass Honders F2.6" -412.52 9
EBR  75.0
ANG  1.0
DES  "OSLO"
UNI  1.0
// SRF 0
AIR 
TH   1.0e+20
AP  1.7455064928e+18
NXT  // SRF 1
GLA BK7       
RD   1556.8930000000003
TH   11.9888
NXT  // SRF 2
AIR 
RD   -2924.9877999999999
TH   347.472
NXT  // SRF 3
PK  GLA  -2
RD   -475.6658
TH   11.9888
NXT  // SRF 4
RFH 
RD   -782.2438
PK THM  -1 0.0 
NXT  // SRF 5
AIR 
PK CV   -2 0.0 
TH   -353.9998
NXT  // SRF 6
PK  GLA  -5
RD   -118.1608
TH   -5.9944
NXT  // SRF 7
AIR 
RD   -3016.2754
TH   -43.3578
NXT  // SRF 8
AIR 
PY   0.0
NXT  // SRF 9
AIR 
CBK  1
WV 0.58756 0.48613 0.65627
WW 1.0 1.0 1.0
END  9
SDSA On
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