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
-
Used Chromalox 4001 SCR Single phase Zero-Crossover SCR power Controller
Original price was: $85.00.$29.75Current price is: $29.75. -
1001146949 Clamp, Indicator Securing Gp | JLG
Original price was: $12.57.$4.40Current price is: $4.40. -
New – Open box Schneider XVUC21B Harmony Base Unit for Light Towers, ø60mm, 24V AC/DC
Original price was: $75.00.$26.25Current price is: $26.25.



