Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Learning
Photo Evaluation
Photo Feedback
Compare sharpness and IQ
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="BF Hammer" data-source="post: 812428" data-attributes="member: 48483"><p>The 2 photos presented cannot be compared like that.</p><p></p><p>The question is really for a lab like imaging-resource.com to measure in a controlled setting. As presented here we have one image at f/8, 500mm and another shot at f/6.3, 600mm. For purely technical reasons, that puts the 600mm f/6.3 shot at a disadvantage because depth of field is going to be shorter. In addition the the 500mm f/8 subject is presenting as more flat to the focal plane so 100% of the cardinal is in the preferred depth of field range. The tail in the 600mm f/6.3 is outside of the ideal depth of field, even though the head is.</p><p></p><p>Put in plain English: If you are trying to make the lens look softer at 600mm on purpose, that is one way to do it.</p></blockquote><p></p>
[QUOTE="BF Hammer, post: 812428, member: 48483"] The 2 photos presented cannot be compared like that. The question is really for a lab like imaging-resource.com to measure in a controlled setting. As presented here we have one image at f/8, 500mm and another shot at f/6.3, 600mm. For purely technical reasons, that puts the 600mm f/6.3 shot at a disadvantage because depth of field is going to be shorter. In addition the the 500mm f/8 subject is presenting as more flat to the focal plane so 100% of the cardinal is in the preferred depth of field range. The tail in the 600mm f/6.3 is outside of the ideal depth of field, even though the head is. Put in plain English: If you are trying to make the lens look softer at 600mm on purpose, that is one way to do it. [/QUOTE]
Verification
Post reply
Forums
Learning
Photo Evaluation
Photo Feedback
Compare sharpness and IQ
Top