EFs 10-20mm

[kenghor]

Tried this lens briefly today.

Feels very light after carrying all those L lenses around.

Distortion is well controlled. If price is right, I would choose

this over the Sigma 12-24mm.<div></div>

[kenghor]

Here's an enlarged potion of the yellow sign board in the middle of the picture.<div></div>

[christopher.]

Is the build quility on par with 28-105 3.5 4.5 or say the drebel kit lens?

[tommyinca]

Is this wide open or stop down.

What f-stop was it shoot at?

Thanks

[jim_larson1]

Cost is $800 US. Only usable on the 300D and 20D.

 

Built quality: Probably similar to the 28-105/3.5-4.5 and significantly superior to the 18-55/EF-S.

 

I suspect not upto the cheaper 17-40/4L build quality. Optical quality is an unknown. Lens groups are similar to the "L" lenses, but this in *NOT* an "L" lens (unlike what they put in the P&S Pro one), despite the cost.

[bellavance]

Where can I see the lens groups diagram?

 

Thanks

 

Pierre

[kenghor]

Picture is taken at f4.

Didn't pay attention to the build quality. Was in a dark corridor when I took over the 20D and 10-22mm lens.

[josh1]

That looks like a wild bunch of party animals...haha. Just kiddin.

[rayn]

Does the lens change length when zooming? Thanks.

[awindsor]

"Lens groups are similar to the "L" lenses, but this in *NOT* an "L" lens (unlike what

they put in the P&S Pro one), despite the cost."

 

The "L" designation for the Pro 1 is simply marketing. It does have "exotic" materials

in its lens but then so does the EF-S 10-20mm.

 

The lens has 3 aspherical elements and 1 "Super-UD" element. However for some

reason Canon chose not to make EF-S lenses "L" lenses. They made a similar decision

with the DO lenses.

 

In the end the lack of an "L" designation has only 1 effect. There is no little red ring

on the end of the lens.

 

This lens would seem to be aimed at being a digital equivalent of the 17-40/4L

(though the range is closer to that of the 16-35/2.8 the constant, fast for a zoom,

aperture makes this lens a different beast). Both the 16-35/2.8 and 17-40/4L are "L"

lenses as is revealed by their us of 3 aspherical elements and 1 Super-UD element.

[bellavance]

Where would I find more info (diagram, MTF charts, type of elements, etc...) about this lens?

 

Thanks

 

Pierre

[steve_dunn2]

<p>The press release on Canon's Web site lists the quantity and type of fancy elements. I haven't seen a block diagram or MTF graph yet. The lens is listed twice on the canoneos.com site (a couple of weeks ago, the 17-40 disappeared from this site, which is part of Canon USA; they do seem to have problems keeping their Web site working properly, and while the two new EF-S designs are on it, the original one is still missing) but one of the links doesn't work and the other doesn't have a great deal of info. The lens has not yet appeared on the Canon Camera Museum site, nor has the Camera Museum's Technical Report section received a September update (which one would expect might cover the 20D, the new lenses, or perhaps the 1Ds II which is widely expected to be announced at Photokina at the end of the month).</p>