For photographic correction of the field produced by the ASA optics designer Dipl. Philipp Keller, proofreaders calculated.
All correctors have sufficient backfocus to use all standard CCD and DSLR cameras.
The proofreaders are not expected for a narrow spectral range from 450 to 650 nm, but on an expanded range of 400 to 700 nm - partly about - optimized. Each lens is used in ASA correctors, is remeasured ASA engineers in radius and thickness. Thus divorced from lenses that are outside the strict tolerances ASA.
All corrector housing are manufactured in company-owned CNC production. We only use high-quality aluminum, which is processed within just 0.01 mm tolerances. The strict quality control of lenses, together with an exact processing of the text, ensures a quality end product of the reference class.
Each offset is tested and calibrated prior to shipment.
Corrected field: 28mm
Back Focus: about 77mm
