1.01X Flattener for FSQ-85EDX

Available from Cloudbreak Optics when we last checked. Sold from the shop’s own store; the price there is the one that counts.

Description When originally conceived, the FSQ-85EDX was meant for use with APS-C or smaller CCD or CMOS chips. At image circle radii beyond about 14 mm, field curvature was evident in larger chips. This new flattener will greatly reduce this field curvature, resulting in a practically flat field out to a 22 mm image circle radios. The two spot diagrams below demonstrate the impact of the flattener on field curvature. Spot Diagram of FSQ-85EDX Without Flattener Spot Diagram of FSQ-85EDX with Fla