The Askar 3 inch F3.9 full frame reducer features 4 elements optical design specifically for the FRA600, offers a 0.7X reduction in focal ratio, when used with the FRA600 astrograph, this reducer effectively shortens the exposure time, its focal length is reduced to 420MM, dramatically increases your field of view and bringing more convenience and possibilities for your visual use or astrophotography. The backfocus is the standard 55MM. It also has a built-in M48X0.75 (2 inch) filter thread that allows you to screw on filters conveniently.
Recently viewed products
-
10238458 Flip Card, Model 844C-42 With | JLG
Original price was: $140.42.$42.13Current price is: $42.13. -
Used Synrad Firestar V20 CO2 LASER Front Shutter Assembly *Bad Screw*
Original price was: $100.00.$30.00Current price is: $30.00. -
Used Eaton FAZ-C20/1-NA Circuit Breaker, 1-Pole, C-Curve, 48VDC 277VAC 20A
Original price was: $35.00.$12.25Current price is: $12.25.



