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 Lot of 2 Parker B22 Quick Connect Coupling 1/4 ” Body to 1/4 ” NPT, 300Psi
Original price was: $39.00.$13.65Current price is: $13.65. -
Used Balluff BCC08KP BCC M415-0000-1A-016-PS0525-050 Single-Ended Cordset M12, *4.5m*
Original price was: $33.00.$11.55Current price is: $11.55.



