Agfa Colostar U 100/4.5

Enlarger lens. No aperture markings. Commonly mis-spelt ‘Colorstar’.

Weight	196 g
Dimensions	100 mm
Focal Length (mm)	100
Max Aperture (f)	4.5
Min Aperture (f)	16
Aperture Blades	Circular
Elements	6
Sharp (Far)	80.0%
Rear Mount	M39
Front Thread	Yes
Flange-Focal Distance (mm @ ∞)	91
RF/L Extension (mm)	71
Serial Numbers	G1482, G0590
Bokeh Character	Very smooth. No bubble. Two point star at f16
Contrast	Medium/Low
Stars	2