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
-
Mosmatic DXGI Swivel 90 Degrees- 37.358 – G1 1/4 “NPTF G2 3/8 “NPTM
Original price was: $3,573.00.$298.00Current price is: $298.00. -
New Lot of 10 Allen Bradley 800F-ALM Metal Latch Coupling Plate, For 800F Series
Original price was: $70.00.$24.50Current price is: $24.50. -
Used PHD ML-187356 Adjustable Linear Slide, Bore: 1-3/8 “, Stroke: 4 “, Ports: 1/4 ” NPT
Original price was: $135.00.$40.50Current price is: $40.50.



