Schneider Apo-Componon HM 90/4.5

Weight	118 g
Dimensions	90 mm
Focal Length (mm)	90
Max Aperture (f)	4.5
Min Aperture (f)	64
Aperture Blades	5 (Convex)
Elements	6 / 4
Sharp (Near)	90.0%
Sharp (Far)	89.3%
Rear Mount	M39
Front Thread	43×0.75mm
Flange-Focal Distance (mm @ ∞)	85.5
RF/L Extension (mm)	66
Serial Numbers	14269222, 14927058
Production	1987-2008
Bokeh Character	Excellent at f4.5 but pentagons stopped down
Contrast	High
Colour	8.5
Focus Shift	None
Flare	6
Stars	3