Product Description

This new lens does what many pros thought couldn't be done - replace the previous L-series 28-70 f/2.8 lens with something even better. Extended coverage to an ultra-wide angle 24mm makes it ideal for digital as well as film shooters, and the optics are even better than before with two Aspherical elements and a totally new UD glass element. It's now sealed and gasketed against dust and moisture, and a new processing unit makes the AF faster than ever. Zoom System - Rotating type Filter Size - 77mm Max. Diameter x Length, Weight - 3.3 x 4.9, 2.1lbs. / 83.2 x 123.5mm, 950g

Product Details

• Brand: Canon
• Model: 8014A002
• Dimensions: 5.60" h x 5.60" w x 8.00" l, 4.00 pounds

Features

• EF mount; standard zoom lens; Comes with Lens Cap E77U, Rear Lens Cap, Lens Hood EW-83F, Soft Lens Case 1219.
• Ultra-low Dispersion glass with Fluorite elements; inner focusing ring; full-time manual focus; aspherical lens
• 24-70mm focal length
• f/2.8 constant maximum aperture
• UltraSonic Motor (USM) AF actuator

Amazon.com Product Description
The Canon EF 24-70mm standard zoom lens does what many pros thought couldn't be done--it replaces the L-series 28-70mm f/2.8 lens with something even better. The lens offers extended coverage to an ultra-wide-angle 24mm, making it ideal for digital as well as film shooters. The new processing unit, meanwhile, makes the autofocus (AF) faster than ever. And thanks to the two aspherical elements and a totally new UD glass element, the optics are far superior to the earlier lens. Sealed and gasketed against dust and moisture, the EF 24-70mm lens carries a one-year warranty.

• Focal length: 24-70mm
• Maximum aperture: 1:2.8
• Lens construction: 16 elements in 13 groups
• Diagonal angle of view: 74 to 29 degrees
• Focus adjustment: Front-focusing method
• Closest focusing distance: 1.25 feet
• Zoom system: Rotating type
• Filter size: 77mm
• Dimensions: 3.3 inches in diameter, 4.9 inches long
• Weight: 2.1 pounds

Customer Reviews

The best canon standard zoom lens
I bought this lens 3 months ago and I'm loving it. There is still slight back focusing issue in some distances condition, but it's really ignorable. The picture is sharp as knife and L lens reputation does what it suppose to do. Previously I had 18-55mm, 50mm 1.8 and Sigma 18-200mm DC OS, now I sold all of them because this lens deserves every penny I paid. Zoom range is little dissappointing but I heard 3x zoom range is the maximum capability that can bring the best picture quality, which means if the zoom range go more than 3x, the quality degrades.
So for example 18-200mm lens is good for all around purpose which covers 10x zoom from wide angle to super zoom, but the quality isn't great as lens that zooms 3x or less.

So I'm quite happy with this lens so far. And if I point out one that really bothers me about this lens is its weight. Because after I carry this lens with my 40D on my shoulder for hours, I easily get tired. =P
Everything else is wonderful. You will forgive tireness once you see the quality of the pictures you take with this lens. I highly recommend this lens to all canon users. 5 stars!

Tactically Tac-Sharp!
When I was looking for a General Purpose glass I contemplated between the 24-105mm F4L & this one. I knew that this lens would weigh much heavier than the 24-105 because of the 2.8 glass which could be a potential concern. I really didn't need the extra focal length as I already have the 70-200 for that. I knew that the 24-105 & 24-70 would run neck & neck as far as sharpness being that they're both L-Lenses. But I did love the speed of the 2.8 on my 70-200IS so I decided on the 24-70.

I have no regrets but damn!.. damn!. damn! What a piece of Glass! And the weight while on any of my Canon bodies, indeed, it's Heavy... But I don't mind after seeing the results. I actually like it being heavy. My, my, my it's 'Oh so sharp! Another bonus feature I love is the Lens Hood which BTW came with the lens & I have it on 100% of the time, stays in a fixed position (it does not extend/retract), the objective lens retracts deeper into the hood as the focal length is increased. The hood is deep & huge! It looks DOMINATING!

All I know is that if I went with the 24-105mm F4L, soon if not later I'll always wonder how the 24-70mm F2.8L would be & probably end up buying one down the road. Hence, ending up with 2 General Purpose glass that have practically similar focal range. Grant it the 24-105 has IS, extra focal length & much lighter(No, thanks). I get nothing less than Tactically Tac-Sharp images! Going with the 24-70mm F2.8L route, I'll never wonder about the 24-105 nor own one for that matter. If you get the 24-105 you'll end up buying this later on I'm sure of it. If you get this first... After using it - Believe me, you'll never want the 24-105. Save & spend your money on the 70-200mm F2.8L IS instead. As partners, these two are a one two punch to have in your Canon Gear!

DO NOT BUY!
Extremely disappointed with this lens. Poor focus after 15', Images never sharp under any condition. Not at all what you would expect from an L series. Lots of $$$$ poor performance. Working on third copy. Unfortunately did not get chance to evaluate prior to warranty running out.

CAUTION!!!!
PS failed to research product reviews prior to purchase, My Bad, Better luck to all!