Sunday, November 22, 2009

100mm, 4 lenses, 2 primes, 2 zooms, center.

At 100mm, we will examine not less than 4 lenses:

Minolta 100mm macro f/2.8 (a 20 years old copy...)
Minolta 100mm f/2.8 soft focus
Minolta 24-105 f/3.5-4.5
Sony 70-200mm f/2.8 G (actually another Minolta design)

The 100mm soft focus is a specialty lens, where spherical aberration can be adjusted for a soft and "glow" effect. Here is is used without any "soft focus" effect, of course.

Because there are 4 lenses in the table, I needed to make the thumbnails even smaller. Do not forget that you can click them and they will open in their own tab for a comparison at the pixel level.

f-stop
100 Macro
100 Soft
24-105
70-200G
f/2.8



f/4 (4.5)




f/5.6




f/8




f/11






It seems that the main difference in sharpness come from different focus, and all 4 lenses are very, very close at f/8. The 24-105 has a little bit less contrast, the 70-200G a little bit more contrast, but the difference is unlikely to be obvious unless by direct comparison as we are doing here.