Our superior quality elliptical secondary mirrors are made of precision annealed Pyrex blanks,
ground to the exact minor axis dimension. All secondary mirrors are made
by our own optician, providing complete control of quality from start to
finish. All secondary mirrors are interferometrically tested
for flatness using a Zygo interferometer during manufacture and prior to
shipping. Secondary mirrors meet or exceed
1/10th wave flatness for sizes of 3.1" and under, 1/8 wave flatness for
3.5" to 4.5" and 1/6 wave flatness for 5.0" to 7.0". All AstroSystems
secondary mirrors are coated with enhanced aluminum, giving 95-96% reflectivity
and long coating life. Superior performance for new or retrofitted telescopes.
Call for availability on secondary mirrors over 4.0".
Rest assured, each and every piece is manufactured to “laser quality” specifications. Minimum quality claim* is 1/10 wave P-V on 3.10" or smaller. 1/8 wave P-V on 3.5" and larger.
| 1.3 | 1.52 | 1.83 | 2.14 | 2.6 | 3.1 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| $60 | $80 | $99 | $149 | $200 | $240 | $365 | $465 | $565 | $640 | $700 | $800 | $900 | $1000 | |
| Wavefront | 1/10 | 1/10 | 1/10 | 1/10 | 1/10 | 1/10 | 1/8 | 1/8 | 1/8 | 1/8 | 1/8 | 1/8 | 1/8 | 1/8 |
| ShipWeight | 2 lbs | 2 lbs | 2 lbs | 2 lbs | 3 lbs | 4 lbs | 5 lbs | 6 lbs | 7 lbs | 8 lbs | 9 lbs | 10 lbs | 12 lbs | 14 lbs |
*On any 4" diameter test circle.