M106 field. A very good raw test on a TI45 f/4. Single 90 sec, unguided, uncalibrated frame, taken with a KAF16803 (37 x 37 mm CCD sensor). Sky was medium-bad (SQM about 20.1, Poor seeing about FWHM 2,6″).
Holding a 362 mm diameter quartz blank in your hand and having the impression that it is made of plastic … it’s fantastic
– Fused Silica (Quartz) performs an awesome thermal expansion coefficient of 5.4 x 10-7/℃ , 6 time less than borosilicate glasses, harder enough to allow better figuring process and advantage in terms of strength to density ratio.
Fused Silica (Quartz) performs an awesome thermal expansion coefficient of 5.4 x 10-7/℃ , 6 time less than borosilicate glasses, harder enough to allow better figuring process and advantage in terms of strength to density ratio.
462 mm quartz blank
