280mm f/4 APO-Telyt-R

• Leica Order No. - 11 360 / LLC - 194

• Era 1993-2009 / Serial Nos. 3492511-

• Lens mount - LEICA R-bayonet for LEICA R3 to LEICA R9 with mechanical, and, for LEICA R8/R9, additional electronic exposure control

• Number of lenses/groups - 7 / 6

• Focusing range - 1.7 m / 5.6 ft < ∞ can be focused beyond infinity, focusing does not have to be corrected for IR-photography

• Aperture - 4 > 22 - Preset diaphragm with clickstops (including half values), Fully automatic diaphragm

• Smallest object field/Largest reproduction ratio - 120 mm x 180 mm / 1:5

• Angle of view (diagonal, horizontal, vertical) - 8.8°, 7.4°, 4.9°

• Position of entrance pupil - 288 mm / 11.3 in (related to the first lens surface in light direction)

• Scales - Combined meter/feet graduation

• Filter mount/Lens hood - Series 5.5 filters in filter drawer, additional internal thread for screw-in type filters E 77 / Built-in, telescopic, rubber-armored hood

• Accessories - APO-EXTENDER-R 1.4x, APO-EXTENDER-R 2x

• Viewfinder - Camera viewfinder

• Materials - optical glass

• Focal length - 283 mm / 11.1 in

• Length to bayonet flange - 208 mm / 8.2 in

• Largest diameter - 88 mm /3.5 in

• Weight - 1,875 g / 4.1 lb

• Inscription - APO-TELYT-R 1:4/280

Puts-R courtesy of Mario Mazziol