Hi, I have got up and running with MTF Mapper, printed a grid target and am performing some MTF testing. It generates MTF curves, ie contrast at chosen resolutions 10, 20 and 40lpmm. I am running through testing of 31 lenses at the moment, at each marked f stop. My most interesting results have been:
- Pentax M 85mm, sharp wide open, and hits peak average sharpness at f5.6, with contrast across the frame of over 63% at 40lpmm
- Vivitar Series 1 v1 70-210mm, sharpest lens at 210mm at any aperture with average contrast of 50% at 40lpm at f5.6
- Tamron 278D 80-210mm, sharpest lens at 135mm at f11 with average contrast of 64% at 40lpmm
I particularly like the slanted edge MTF testing on a grid, as its a quick way to profile a lens across the image plane.
Here is the result for the M 85mm at f5.6:
Here is a list of lenses I have for testing (cannot mount the Vivitar S1 35-85 at the moment as its rear flange hits the K7 body):
Pentax DA 18-55 AL
Pentax M 75-150
Pentax M 80-200 v1
Vivitar S1 V1 70-210
Vivitar S1 V2 70-210
Vivitar S1 V3 70-210
Tamron SP 70-210 19ah
Tamron SP 70-210 52a
Tamron SP 60-300 23a
Kiron 80-200 f4
Kiron 75-150
Vivitar S1 35-85
Vivitar S1 28-90
Tamron 28-105 179D
Tamron 80-210 278D
Pentax F 80-200
Tamron SP 28-135
Tamron SP 28-80
Tamron SP 24-48
Pentax M 24-50
Pentax FA 28-70
Tamron 28-80 77D
Sigma 21-35
Pentax M 135
Pentax M 85
Pentax M 50 1.4
Pentax M 50 1.7
Pentax M 28 3.5
Pentax M 28 2.8
Tamron SP 90 2.5
Pentax M 200