Some old and new lens comparisons ...
The list is long and ... notable: The oldies but goodies
Minolta AF 35-70mm f/4 MACRO
SONY AF 18-70mm f/3.5-5.6 DT "Kit lens"
TAMRON Powermaster AF 28-200mm f/3.8-5.6
The center lens, KM AF 24-105 f/3.5-4.5 "D" was in need of repair and its results have been deleted
TAMRON AF 28-300mm f/3.5-6.3 XR Di LD Aspherical (IF)
TAMRON AF 18-250mm f/3.5-6.3 XR Di LD Aspherical (IF)
TAMRON SP AF 28-75mm f/2.8 XR Di LD Aspherical (IF) MACRO
The class of glass ...
This thread will run in six parts ... at three different focal lengths for resolution (35mm, 50mm, 70mm) at a distance of 7-feet for the entire series.
Camera is tripod-mounted with a electronic release. Lighting is from four overhead incandescent (Tungsten) 75W Floods.
The actual focal length is a bit imprecise, as I used marked measurements indicated on each lens barrel.
Each image is a crop from the original without any scaling or resize.
Bear in mind that some lenses will not support f/4 at certain focal lengths ... and there will be a difference in the brilliance as we go long ...
I have noted the aperture changes in parenthesis (f/ ...).
This test took 2 & 1/2 hours for shooting and postprocessing, after set up of target and tripod.
First, the 35mm shots, at the widest available aperture (keeping it roughly @ f/4) for the lens, simulating a low light light shot (in the order listed above):
Minolta AF 35-70mm f/4 MACRO (f/4)
SONY AF 18-70mm f/3.5-5.6 DT "Kit lens" (f/5.6)
TAMRON Powermaster AF 28-200mm f/3.8-5.6 (f/4)
KM AF 24-105 f/3.5-4.5 "D" (results deleted)
TAMRON AF 28-300mm f/3.5-6.3 XR Di LD Aspherical (IF) (f/4)
TAMRON AF 18-250mm f/3.5-6.3 XR Di LD Aspherical (IF) (f/4.5)
TAMRON SP AF 28-75mm f/2.8 XR Di LD Aspherical (IF) MACRO (f/4)
Next ... 35mm @ f/8
Last edited by DonSchap; 05-05-2009 at 02:38 PM.
- BFA, Digital Photography
A Photographer Is Forever
Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.