Hello,
I couldn't find the Canon 75-300 f4-5.6 IS USM III review here. I am trying to compare its sharpness with some other lenses from this class.
There's no such thing as a IS USM III.
Canon has 3x 70-300 IS lenses.
These two:
http://www.opticallimits.com/canon-eos/201-canon-ef-70-300mm-f45-56-usm-is-lab-test-report--review
http://www.opticallimits.com/canon-eos/200-canon-ef-70-300mm-f4-56-usm-is-test-report--review
Plus the new L IS.
They had a 75-300 USM III in the past as well as the 75-300 IS USM.
Both have long been discontinued, though, and I'm afraid that they won't be reviewed here, ever.
Regarding performance: don't expect too much from anything older than the 70-300 IS USM, especially on a modern DSLR.
-- Markus
Editor
opticallimits.com
[quote name='mst' timestamp='1289470077' post='4099']
They had a 75-300 USM III in the past as well as the 75-300 IS USM.
Both have long been discontinued, though, and I'm afraid that they won't be reviewed here, ever.
Regarding performance: don't expect too much from anything older than the 70-300 IS USM, especially on a modern DSLR.
-- Markus
[/quote]
The 70-300 IS USM has not been discontinued. It is still listed over at Canon.de and widely available.
[quote name='mst' timestamp='1289500669' post='4108']
However, I just realized that the 75-300 USM III (non-IS) still seems to be a current lens.[/quote]
I don't know why, but a lot of shops outside Europe seem to bundle this lens instead of the (equally priced) 55-250 IS with new cameras.
But who understands Canon? They don't even offer the 7D + 15-85mm kit in the US (although they do offer it with the 28-135).
IMHO Canon could cut a whole bunch of old, long superseeded lenses out of their lineup.
' />