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 815-VBCP Universal Wall Mounted Flushing Rim Sink Faucet Polished Chrome –
Original price was: $763.52.$190.88Current price is: $190.88. -
S-Tec Yaw Dampener Computer xx1AWT (Pre-owned)
Original price was: $369.00.$92.25Current price is: $92.25. -
Used GE Fanuc IC693CHS391C Base I/O Rack for 90-30 Series PLC, 10-Slot, 5VDC, DB25F
Original price was: $70.00.$24.50Current price is: $24.50.



