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

Lack of sharpness at f1.8 on Canon 50mm STM

Started 4 months ago | Discussions thread
BAK Forum Pro • Posts: 26,019
Suggestion at f1.8 on Canon 50mm

RE: >> What lens might you suggest that can go actually perform well and properly at f1.8 (or better)? <<

You should go to www.opticallimits.com and look at the charts for all the 50 mm lenses.

You will get a much better understanding of where optical science meets the credit cards of photographers.

As a general rule, with almost any lens, quality increases as you stop it down, as has already been posted. By "quality increases" I mean sharper in the center, plus sharper as you get closer to the top, bottom and sides of the frame, and finally, the corners improve.

And vignetting decreases as you stop down the lens.

A WORKAROUND: back up a bit. Now what used to be the edges before you backed up will be relatively closer to the center, and probably sharper. This works particularly well with groups of people.

ANOTHER PROBLEM:Is the lens taking a curved field picture or a flat field picture?

BAK

Post (hide subjects) Posted by
BAK
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow