traveller said:
Luds34 said:
ahsanford said:
PepeSilvia said:
So the 24, 28, and 35 primes got IS replacements as a group, but none of those had USM before. Maybe the USM non-L primes (or at least a few of them) are getting IS replacements as a group. Candidates include the 100 f/2, 85 f/1.8, 50 f/1.4, 28 f/1.8, and 20 f/2.8.
Out of those, the ones I think need an update the most are the 50 and the 20...
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You are referring to the long-awaited 'Middle' column of the chart that could sorely use an update (see attached). The 50 and 85 on that list simply must come first due to their usefulness, IMHO, but I understand your comments on the 20mm.
- A
I agree on the 50mm.
Disagree on the 85mm. The 85mm f/1.8 is a very solid lens. It's light, fast aperture, fast focusing, renders excellent bokeh, and is quite strong optically, especially stopped down (CA is it's weakness). In fact, if you don't need faster then f/1.8 it's a better choice then the 85mm f/1.2L.
The 85/100 consumer primes are oldies but goodies from Canon and while I wouldn't be surprised if they released updates, I think they probably have higher priorities, better opportunities in their lens design department.
Longitudinal chromatic aberration can be a problem on the 85mm f/1.8, even if the Canon is typical of this class of lens. I would like to think that the technology is there to correct for this in a more modern lens design. The question is could Canon do this without bumping up the price to 'L' or Zeiss Milvus money? It would also be nice to see a slight bump in off-centre resolution; I know that some say it's not an issue on a portrait lens, because the depth of field wide open hides the softness anyway, but when did you last compose a photo with the subject dead centre? If you want to see what's possible, try this comparison:
http://www.the-digital-picture.com/Reviews/MTF.aspx?Lens=106&FLI=0&API=0&LensComp=1000&FLIComp=0&APIComp=0&CT=ISO30
Okay, it's not fair to compare a £240 lens to a £1240 lens (just like f/1.8 vs f/1.4 isn't fair either), but it shows what is possible with modern optics. Out of fun, compare the improvement of the Zeiss Milvus over its predecessor.... You pay a near 50% premium for the Milvus over the old ZE 85 f/1.4 T* and it looks to be worth every penny. I'd be willing to pay more than double for a similarly improved 85mm f/1.8 II, but I suspect that this will have to wait for the 85mm f/1.2 L III at >£2000 and >1.3kg
I agree with your assessment, and is part of the reason why I don't think we'll see an updated "consumer" 85mm prime anytime too soon. With that said, I believe Canon could completely refresh that lens and come out with something sharper, eliminate the CA and give us something a bit more punchy and micro contrasty. I don't think the lens would cost them all that much to manufacture, but because of the improvements and such they would probably demand a good premium for it, and come in somewhere in the double to triple price range of the current lens.
I really like Brian's website. I wish he had test results of those lenses stopped down through the common apertures (Would allow those "fair" comparisons you speak of too). The 85mm like a number of those era lenses, is a bit soft wide open, but sharpens up very quickly even stopping down a tiny bit. Which is why I typically shoot that lens in the f/2 to f/2.5 range.
It's interesting you speak of modern optics. For fun I looked at the 135mm f/2L (my most recent lens pickup) and that is a very solid/sharp lens across the frame and I think we all know how old that lens design is.