Quote:
Originally Posted by FlashDrive
They are nice alright ... Quartz Mirror ...??
Col.
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Yes, it has a quartz mirror.
The Questar 50th Anniversary telescope differs from the regular production models in the following ways:
- The moon map, the star chart, and the RA setting circle are etched and silk screened as was done on the original Questar of 1954. This is intended to give a 3D feel and appearance.
- The primary mirror is made of Quartz (fused silica) for thermal stability, with enhanced protected silver reflective coatings.
- The corrector lens is made of the usual borosilicate crown, but with a durable magnesium fluoride anti-reflection coating on both front and rear surfaces.
- The optics are hand figured to 1/10th wave or better. Each set is professionally certified across the full aperture by an accompanying Zygo GPI interferogram.
- On the lens cover, fork arms and left side at rear of the barrel are special 50th anniversary model logos.
- The Questar Powerguide II Drive and Corrector is installed.
- A full aperture solar filter is provided
- The telescope is delivered with the deluxe leather carrying case, with combination lock.
- Questar 50th Anniversary Telescope bears a serial number with the prefix "50TH" and suffix "SQTZ".