ASKAR 91F f/6.7 APO REFRACTOR 294MM The coating has been optimized

The coating has been optimized so that they are most effective where the human eye has its greatest sensitivity at night

88 times the human eye

Suitable for 4” 10Micron dovetail slide bars

External diameter 150 mm

25" filter thread

ASKAR 91F f/6.7 APO REFRACTOR 294MM The coating has been optimizedThe Askar 91F is an apochromatic quadruplet flat field astrograph that offers high performance for an exceptionally low price. The quadruplet design makes it perfect for both visual observation and astrophotography. The objective lens features an element of extra low dispersion glass (ED) that minimizes chromatic aberration. The Askar 91F is a versatile instrument and excels not just at imaging, but as a grab & go visual telescope. The OTA itself