DPReview.com is closing April 10th - Find out more

Loss of sharpness on Canon 100-400

Started May 4, 2020 | Discussions thread
maiaibing Veteran Member • Posts: 5,139
Re: Loss of sharpness on Canon 100-400

Cporosus1 wrote:

Hello everyone,

I have a question to ask- is it possible for a lens (in my case, the Canon 100-400) to lose sharpness? I have been using this lens since 2008 (it is the "dust pump" model not the newer one) and I have traveled all over the world with it (Australia, Belize, Brazil, Costa Rica, Indonesia, Singapore, South Africa, Sri Lanka, etc. some multiple times).

You can have been unlucky and it got a bump somewhere along the way misaligning the lens elements. Try sending it in for adjustment.

 maiaibing's gear list:maiaibing's gear list
Canon EOS 5DS R Canon EF 70-200mm F2.8L IS II USM Canon EF 300mm f/2.8L IS II USM Canon Extender EF 1.4x III Canon Extender EF 2x III +5 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow