Carl Zeiss Jena Biotar 58mm f/2 vs Minolta MC Rokkor-PF 58mm f/1.4

What actually differs

• The Minolta MC Rokkor-PF 58mm f/1.4 is 1 stop faster: f/1.4 against f/2.
• The Minolta MC Rokkor-PF 58mm f/1.4 is cheaper. Typical used value is $130 against $230, a gap of $100 (roughly 1.8x). Ranges: $70 to $260 versus $120 to $550.
• Both are 58mm lenses, so framing is identical on the same sensor.
• The Carl Zeiss Jena Biotar 58mm f/2 is the older design; production began around 1936 against 1958 for the Minolta MC Rokkor-PF 58mm f/1.4 (1936-1960 versus 1958-1970s).
• They use different mounts, M42 and Minolta SR (MC), so each needs its own adapter. Both reach infinity on mirrorless bodies with a plain mechanical adapter.
• Construction differs: 6 elements in 4 groups for the Carl Zeiss Jena Biotar 58mm f/2, 6 elements in 5 groups for the Minolta MC Rokkor-PF 58mm f/1.4.

Which one to buy

On the catalog data the Minolta MC Rokkor-PF 58mm f/1.4 wins on the 1 stop of extra speed and the $100 lower typical price, and the Carl Zeiss Jena Biotar 58mm f/2 gives up nothing measurable in return except its own rendering, described below. Condition and variant matter more than the spec sheet at these prices.

Minimum focus distance, weight, and measured sharpness are not in the catalog, so this comparison does not claim anything about them.