One complaint I have with current 24-105 design is that is really isn't that close to an f4 lens. It's T-stop value is closer to making it an f5.6 lens - which is pretty slow. The Sigma version of 24-105 seems to be truer f4 -- testing shows the Sigma provides almost 1 full stop more light transmission.
A new Canon version of the 24-105L with up to date coatings, a tweaking to improve optical formula (and/or reduce copy-copy variation), latest IS technology, and superior weather sealing would seem to be in order at some point. I'm good for the moment with the one I have (cost $800 white box new several years ago) but would seriously consider upgrade if improvements were significant.
Likely Canon will keep cranking out the current design until it feels the tools and fixtures are getting so worn it can't make lenses that pass spec. any longer.
A new Canon version of the 24-105L with up to date coatings, a tweaking to improve optical formula (and/or reduce copy-copy variation), latest IS technology, and superior weather sealing would seem to be in order at some point. I'm good for the moment with the one I have (cost $800 white box new several years ago) but would seriously consider upgrade if improvements were significant.
Likely Canon will keep cranking out the current design until it feels the tools and fixtures are getting so worn it can't make lenses that pass spec. any longer.
Upvote
0