Carl Zeiss Jena Biotar 75mm f/1.5

Lens categoryShort Telephoto
Vendor nameCarl Zeiss Jena
Type nameBiotar
Product year1951
Focal min (mm)75
Focal max (mm)75
Focus min (cm)80
Aperture max1.5
Aperture min1.5
Diaphragm blades8
Filter size (mm)58
Carl Zeiss Jena Biotar 75mm f/1.5

The 75 Biotar enjopy almost legendary reputation for being one of the fastest and most desirable lens of its time with amazing quality to its pictures and still do enjoy the same today. The late version of the lens had a pre-set mount and 58mm fileter and able to focus down to 0.8m, while the early heavy mount version had manual diaphram, take 55mm filter and only focus to 1m

It is a revival of the pre-war design Biotar which is Zeiss correct naming for assymetrical double gauss designed opticals

The 75 Biotar exhibit a fair amount of abbration from Wide Open and careful composition is required not to introduct complex background with pattern or lines. The performance increase dramatically at 2.4 and beyond while at 4.0 the Lens is at its best use for portrait with enough DOF but still maintain the glow and blurred background render. The resolution of this lens peaks at 8.0 and so do all the optical performance. At 16 and beyond Diffraction cause a lost of detail accutance and resolution.

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  • Franka T. Lieu  10:53 Mar 10, 2011 

    The 75 Biotar is an amzing but difficult lens to use effectively, no less because photographers tend to be attracted to its fast speed. truth be told, the lens when shooting at wide open can render complex background in unpleasant BOKEH. This lens have a multiple personality also; when shooting at wide or near wide open, the color tend to be de-saturated, and low in contrast although in a pleasing manner. When stop down to 4 to 8, the lens is sharp and contrasy and color pops; and shooting at 11 or smaller, it behave very much like a long focal standard and resolve likewise too. This shoot of the local fishing pier during a cloudy late afternoon is taken at 4.5 handheld and the lens retain details in both the highlight and shadow area quite well. By all account if you want saturation to boot, this is not the lens for the job

    When the weather is not right

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