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
-
Chicago Faucets 445-L12ABCP Universal Wall Mounted Service Sink with Adjustable Centers Polished Chrome –
Original price was: $362.66.$90.67Current price is: $90.67. -
New – Open box SMC SY3440-5LZ Solenoid Valve 5 Port, 3-Pos Exhaust Center, 24v DC Coil
Original price was: $75.00.$26.25Current price is: $26.25.



