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Lenses / Re: Why aren't zoom lenses faster than 2.8?
« on: April 24, 2013, 06:11:29 AM »
It's definitely possible to make a practical <2.8 zoom lens with a conservative zoom range (not too wide and not too long).
The Tokina AF 28-70mm f/2.6-2.8 AT-X Pro II is a (discontinued) full-frame lens that is a tad faster than 2.8 at the wide-end, and it's not very large (A bit larger than the 24-105 f/4 IS). Moreover it's fixed length (does not extend while zooming). Quite a nice piece of engineering.
The Tokina AF 28-70mm f/2.6-2.8 AT-X Pro II is a (discontinued) full-frame lens that is a tad faster than 2.8 at the wide-end, and it's not very large (A bit larger than the 24-105 f/4 IS). Moreover it's fixed length (does not extend while zooming). Quite a nice piece of engineering.

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will certainly bring out the best images you can get on a $200 budget.