This is a serious lens of exceptional image sharpness and build quality

Now, sharpness won't be a concern

The NON-IS is pretty good at 2.8, and stopping down to 8.0 showed me crazy sharpness, however, the version two is just as sharp at 2.8 as the non-is at 8.0!

I use it almost constantly because of the great low light capabilities as well as the sharpness of the glass.

The sharpness and the speed of the lens is absolutely amazing.

I finally have a working combination....spectacular color and sharpness through out

The sharpness cannot be defeated from 80-200mm in any zoom lens.

I am not too happy with the 24-70 L it lacks sharpness and color if I am any

I sat on the bow of a small boat and photographed other boats and floating houses in Vietnam and Cambodia while zooming up and down rivers and around the delta and even though my boat was bouncing and the subjects were moving quickly towards me, the sharpness was outstanding.

Beautiful color saturation and sharpness at any aperture.

Sharpness hold up well with a 1.4X teleconverter, better than the other three lenses

The sharpness is amazing

This lens has amazing sharpness across the focal range.

Outstanding sharpness, contrast and color

I couldn't believe how 1 stop of IS really improved the quality and sharpness of the photos in low light

The sharpness of this lens is INCREDIBLE

With our APS-C crop sensor camera, we got the best sharpness at 100mm and /4

The sharpness throughout the entire frame and the color renditions are simply superb.

Lightning fast AF, Incredible Sharpness, Build Quality, Hood Design, Excellent ISCons

The sharpness is wonderful, the contrast is great and the image stabilizer is incredible

but I read that the sharpness and IS have both been improved.

They've also improved sharpness, contrast, and chromatic aberrations the previous model suffered

The bokeh is OK but a little busy and not as smooth as with the legendary 135

at -5, there was a noticeable loss of detail; +0 to +5 are indistinguishable and as sharp as it gets.

The feel of the focus and zoom rings are about as "perfect" as it can get.

I'm mostly a portrait photographer (seniors and weddings) and it's great in the studio as well as in churches and other low-light areas.

Briefly, the newer features over the Mark 1 are: new fluorite elements - increased optical quality and reduced CA and less flare (as to whether that is that good or bad is subjective)

I agonized over the upgrade for as long as it took to save the money.

It is without a doubt as sharp as my f4 IS ever was.

It's as good as or better than my 16-35 on that point because the IS is so good.