Alley in Pisa, Italy

by Lars Kotthoff

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4
votes
1answer
531 views

Do all telephoto zoom lenses backfocus on the wide angle end?

I’ve just gone through a round of testing with two telephoto zooms, on two different cameras, and both appear to have significant back focus issues at the 70mm end. I just had the Nikon 70-200 f/2.8 ...
3
votes
4answers
1k views

How to avoid soft image at longest focal length with telephoto zoom lens?

I have a Tamron 70 - 300mm lens. I have noticed that the best focus I can achieve at the 300mm setting is not as sharp as the focus I usually get at a lower setting. Is this a common problem? Is there ...
6
votes
4answers
885 views

How can I get sharp images using optical zoom function on a point-and-shoot?

We’ve got a point-and-shoot (Canon A590 IS), and it seems that the zoom function is completely useless because it is always blurry, even in broad daylight. For example, I tried to take a picture of a ...