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nFD f/2 or f/2.8?


joseph_dickerson

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I've had both and found that the f/2 is not only better constructed, but also sharper both wide open and stopped down. Photozone reports similar findings in their lens performance survey results, although the sample size is small.
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  • 2 months later...

I found this website that has some FD lens test results and it does say that the nFD 35mm f/2.0 is slightly better than the nFD 35mm f/2.8 when shot at similar apertures.

 

Wayback Machine

 

Canon FD 35mm f/2 bayonet mount

Canon EF with mirror and aperture prefire

Vignetting = B @ f/2, A- @ f/2.8, A thereafter

Distortion = slight waveforming with slight barrel tendency

Aperture Center Corner

f/2* B C+

f/2 B B-

f/2.8 A- A-

f/4 A A-

f/5.6 A A

f/8 A A-

f/11 A- B+

f/16 B+ B

f/22 B- B

Notes: * = tested with a Quantaray UV filter. Moderate contrast images at f/22; moderately high contrast images at f/2 (with and without filter) through f/4 and at f/16; high contrast images at f/5.6 through f/11.

 

 

Canon FD 35mm f/2.8 bayonet mount

Canon EF with mirror and diaphragm prefire

Vignetting = B- @ f/2.8, A- @ f/4 & f/5.6, A thereafter

Distortion = barrel

Aperture Center Corner

f/2.8 B+ B

f/4 A- B+

f/5.6 A A

f/8 A- A-

f/11 B+ B+

f/16 B B

f/22 B- B-

Note: high contrast at f/4 and f/11 through f/22; very high contrast at f/5.6 to f/8; moderately high contrast at f/2.8.

 

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