Taylor-Hobson Ental II 50/3.5

Reverse Tessar enlarger lens marked 2”. Lanthanum glass. Pre-1965 models (#589833-610523) have TTH packaging and are marked ‘TAYLOR-HOBSON’; post-1965 models (#631185-692448) have Rank Precision packaging and are marked ‘RANK TAYLOR HOBSON’ (no hyphen).

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Weight	150 g
Dimensions	50 mm
Focal Length (mm)	51
Max Aperture (f)	3.5
Min Aperture (f)	16
Aperture Blades	8 (Curved)
Elements	4 / 3
Production	Post 1960
Serial Numbers	589833, 692488