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Star/RCOS Lawsuit The Facts
 
Lawsuit Settled 01/23/08

RITCHEY-CHRETIEN OPTICS
ASTROGRAPH SERIES

Specifications for standard design optics follow.
Note: Diameter of primary and secondary mirrors represents mechanical blank dimensions.

PART NUMBER

RITCHEY-
CHRETIEN ASTROGRAPH
BACK
FOCUS
SPACING
PRIMARY
THICKNESS
PRIMARY
HOLE
SECONDARY

NOVEMBER 18, 2007
PRICING*

RC-10A
10” f 7
9"
22.40”
1.25”
3.5”
5.0" * 0.65"
SOLD OUT
RC-12A
12.5" f 6.6
9"
27.33"
1.50"
3.5"
6.0" * 0.75"
SOLD OUT
RC-14A
0
0
0
0
0
0
SOLD OUT
RC-16A
16" f 6.4
10"
34.45"
2.00"
4.0"
7.25" * 1.00"
SOLD OUT
RC-20A
20" f 6.8
12"
46.30"
2.00"
4.5"
9.00" * 1.50"
SOLD OUT
*Price does not include coatings.
FOB Newnan, GA

While others may promise you “the Sun, the Moon and the Stars”,
STAR INSTRUMENTS is pleased to offer the ULTIMATE in optics for the amateur astrophotographer at a down-to-earth price!

For the past several years, Star Instruments has been developing a low-cost alternative to our professional series of Ritchey-Chretien optics. Our goal was to design a system with as flat a field as possible, no color and a system that could be produced less expensively. With these goals in mind we designed a system using Pyrex mirror blanks, a 50% central obstruction and a short back focus.

The Star Instruments Ritchey-Chretien Astrograph is the ultimate optical system producing impressive results. When compared to f8 coma-free Schmidt-Cassegrain systems, the RC Astrograph has no color, approximately twice as flat a field, less astigmatism and a faster f ratio – the qualities that advanced astrophotographers have been seeking for deep sky astrophotography. Optics are diffraction-limited for maximum performance.

Spot sizes for the corners using a 35mm format are as follows:
RC-10A 17 microns
RC-12A 20 microns
RC-16A 20 microns
RC-20A 20 microns

For information regarding optical tube assemblies using Star Instruments
Ritchey-Chretien Astrograph optics, click on the following links:

rc ogs