Eliminate field curvature in short, optically fast refractor telescopes with this handy 38mm clear-aperture, fully multi-coated field flattener
Designed for use with 400mm to 650mm focal length refractors with f/5 to f/7.5 focal ratios
Optimizes your fast refractor telescope for astrophotography
Preserves focal length attributes of the attached refractor telescope while flattening the field of view
Requires 55mm of refractor telescope backfocus, weighs 7.5 oz.

Technical Details

Product Details

Package Dimensions
Width : 3.1 inch
Height : 2.7 inch
Length : 5.8 inch

Shipping Weight: 10.4 ounce (View shipping rates and policies)

ASIN : B004SFLCLO