Canon FL-mount 300mm f/5.6 FLUORITE Super telephoto lens w/Canon 2X-A FD Tele-Extender - MIR Image Library

Series of 6 Photos in this page are loading gradually now ... Marketed:- 1969 Lens Constructio: 7 elements in 6 groups No. of Diaphragm Blades:- 8 Minimum Aperture:- 22 Closest Focusing Distance (m):- 3.5 Maximum Magnifcation (x):- 0.091 Filter Diameter (mm):- 58 Dimension/ Weight:- 75mm x 168mm / 850g First interchangeable lens for SLR cameras that used artificial crystal fluorite (calcium fluoride/CaF2) lens elements. Fluorite has a crystalline structure and is equipped with extraordinary optical characteristics unobtainable with optical glass - a low index of refraction and low dispersion. It used two fluorite elements. Moreover, the dispersion characteristics of fluorite are nearly identical with optical glass for wavelengths in the range from red to green, but differ greatly for wavelengths in the range from green through blue. Those characteristics enable significantly improve the imaging performance of super-telephoto lenses. "F" in the name stands for "Fluorite". - Source: Canon Museum - Credit: Image courtesy of Mr. Peter Coeln from LEICA Shop®, Austria who also operates a popular Westlicht Auction House. Image Copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer. | BACK | Canon FL lens page MF Canon FD lens Section | MF Canon SLR cameras Canon EF Lens group (Auto Focus) Canon RF lens info (brief) Credit: Image courtesy of Mr. Peter Coeln from LEICA Shop®, Austria who also operates a popular Westlicht Auction House. Image Copyright © 2008. All rights reserved. Please respect the visual property of the contributing photographer.