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
-
New Lot of 4 Rittal 8018191 Junction Box Mounting Panel 7.5in x 5.0in
Original price was: $31.00.$10.85Current price is: $10.85. -
Used Cognex VVS-8501VX-000-P Opt: A Rev. A Frame Grabber Card, PCI, HD DB26, CL
Original price was: $872.00.$218.00Current price is: $218.00. -
1276875GT Plastic Overflow Bottle 1.3L | Genuine Genie
Original price was: $33.42.$11.70Current price is: $11.70.



