24-70mm softer than 35-70mm at 70mm?

odagled

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Has anyone noticed that their 24-70mm is soft at 70mm? I bring this up because I noticed that my GF's 35-70mm is sharper @ 70mm than my 24-70mm both at f/2.8. I had the lens repaired in March but only noticed this recently. I will have another 24-70mm to compare in a week. Until then, anyone have experience with these 2 lenses?
 

Braineack

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I can't find an MTF for the 35-70mm, but frankly I'm not that surprised.


edit: okay here --

this is the MTF for the 35-70mm as found on photographylife.com

Nikkor-AF-35-70mm-f2.8D-MTF-Wide.png
@70mm

and here's the 24-70:

2164_AF-S-NIKKOR-24-70mm-f2.8G_MTF-T-300x255.jpg



on paper, the 24-70 is MUCH sharper -- especially on the edges of a FF.

again, on paper, the 35-70 is only sharper at 70mm and f/2.8 at the very dead center.
 
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table1349

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Keep in mind, just because you have a fast lens doesn't mean you have to shoot it wide open. Stop down to say 5.6 on both and see what happens.
 

adamhiram

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This is often the case with normal zoom lenses when shot wide open. I use a Nikon 17-55 on DX, and at 55mm at f/2.8, the image gets a bit soft. Stepped down 1-2 stops it sharpens right up. The same is true of the 24-70 - as sharp as it is, it can get a bit soft on the long end when shot at f/2.8. Try stepping it down to f/4 or f/5.6 at 70mm and see if you notice the same sharpness.
 
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odagled

odagled

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Of course. However, sometime I do need that 2.8 when I'm shooting an event with no flash allowed. I just figured that since it is a way newer lens, it would be sharper (or at least as sharp) as the older model where I need it most.
 

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