Askar Lens is introducing a new product for widefield astrophotography, the 107PHQ 107 mm F/7 Quadruplet Flatfield Super APO Astrograph. The four-element Petzval system...
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Askar Lens is introducing a new product for widefield astrophotography, the 107PHQ 107 mm F/7 Quadruplet Flatfield Super APO Astrograph. The four-element Petzval system...