Lens Resolution with Film: Canon EF 85mm f/1.8, Canon EF 100mm f/2 and Canon EF 135mm f/2 L Lenses

Lens resolution was compared using a lens resolution chart and Technical Pan film as described here.

The EF 135 f/2 L was sharpest of the three lenses from f/2 to f/4. The EF 100 f/2 was the least sharp lens. Note: I tested 2 EF 100 f/2 lenses. Both were less sharp at f/2 through f/4 than the EF 85 f/1.8. This was surprising since photodo.com ranks the EF 100 slightly better than the EF 85 1.8.

High resolution images comparing sharpness of the lenses from f/2 to f/4 are shown below. Lack of image sharpness with the EF 100 f/2 shows up at f/2. At f/2.8 and f/4, differences in image sharpness are difficult to detect in enlarged images from scanned film.

Image Sharpness at f/2 with Film

EF 85mm @ f2

EF 100mm @ f2

EF 135mm @ f2

Image Sharpness at f/4 with Film

EF 85mm @ f4

EF 100mm @ f4

EF 135mm @ f4