Just purchased a Sigma 50mm 1.4 very soft wide open????

Started Feb 3, 2013 | Discussions thread
DaSigmaGuy
Forum ProPosts: 12,275Gear list
Like?
Re: Just purchased a Sigma 50mm 1.4 very soft wide open????
In reply to jburrows500, Feb 3, 2013

jburrows500 wrote:

1.4 ISO 100

1.8 @ 100

2.0 100

2.5 100

2.8 100

3.5 100

5.0 100

Just purchased a brand new 50mm 1.4 tonight and did a few test shots. Imported them into lightroom and found the images very oft wide open. Did a little test with same iso (100).. the results explain why my images appeared soft and not at all sharp.. see ingredient printing.. becomes clear until 2.0. Did I get a bad copy or is this what I should expect at 1.4.. Thanks!

Its a DOF issue...the wider the aperture, the shallower the DOF and the larger the sensor, the shallower the DOF for a given f-stop at a set distance.   You have a big sensor and a fast aperture, hence the problem.

 DaSigmaGuy's gear list:DaSigmaGuy's gear list
Fujifilm FinePix F660EXR Sigma SD10 Sigma SD14 +25 more
Reply   Reply with quote   Complain
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow