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I'm not entirely sure why so many people are complaining about the new primes.
- The current EF 24mm f/2.8 is 24 years old. The current EF 28mm f/2.8 is 25 years old. They're so old, they don't have USM because they pre-date that technology. Their optical formulas are so outdated, they're easily outperformed by modern zoom lenses. Hopefully these primes will actually outperform the L-zoom lenses like they should.
The EF 300 f/2.8 came out in November 1987 with a USM focusing system. Sure, the EF 28 f/2.8 came out in April 1987 (a few months before the 300 f/2.8), but the 24 f/2.8 came out well after the 300 f/2.8 and its USM focusing system.
As to the 28 f/2.8's less-than-stellar performance, that's probably attributable to having a very simple 5 element design. The FD 28 f/2.8 had a 7 element design. As an analog, Nikon's 28 f/2.8 had a 7 element design and then an 8 element design up through the Ai-S series, but went to a 5 element design for the Series E and AF. These 5 element designs were considered quite inferior to the previous versions. The AF-D version was upgraded to a 6 element design which was considered much better.
Ultimately, I get the impression that the 28 f/2.8 was considered a cheapie lens, so they used a cheap optical formula and set it at a price that is far less than either the 24 f/2.8 or the 35 f/2. It was probably designed to pair with the 50mm f/1.8 as another cheapie lens (though, one that performs quite well with a simple design).
That being said, the 24 f/2.8 is a very good performer.
Edited on Feb 06, 2012 at 09:17 PM · View previous versions