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
Lenses
Wide-Angle
Do you set hyperfocal or focus a different way?
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="aroy" data-source="post: 283458" data-attributes="member: 16090"><p>As the sensor density increases and the details are rendered finer, the DOF changes. What may have been OK for a 10MP sensor will be OOF for a 24MP sensor (same size), as now you can see more details per mm of the sensor. So what was fine for film has now to be narrowed down. So the DOF narrows and calculations should take that into account. Now the DOF will be calculated based on </p><p>. Aperture</p><p>. Distance</p><p>. Sensor density (or MP, which ever is easier)</p><p></p><p>With modern AF lenses the throw of the focus is short to facilitate faster focusing by the machine, hence the even if the DOF scale is given it is meaning less.</p><p></p><p> With lenses designed for manual focus especially some macro lenses the focusing marker moves at least 180 degrees and in extreme cases 300 degrees. With that much movement the focusing scale will be at least an inch long and in case of a fat barrel upto 2.5 inches long. With that long a scale you can judge distances and set hyperfocal distance with DOF scale. With modern lenses the scale is between 1/4 and 1/2 of an inch so setting the distance manually based on the values on the scale is extremely difficult if not futile.</p><p></p><p>That is why knowing the DOF depth and focusing ahead is the norm today.</p><p></p><p>I wish that some day the camera manufacturers would incorporate a feature which would let us dial a distance and the lense would focus for that distance - a fairly simple feature as anyway the camera knows at what distance the focusing point is (the "D" part of Nikon D lenses).</p></blockquote><p></p>
[QUOTE="aroy, post: 283458, member: 16090"] As the sensor density increases and the details are rendered finer, the DOF changes. What may have been OK for a 10MP sensor will be OOF for a 24MP sensor (same size), as now you can see more details per mm of the sensor. So what was fine for film has now to be narrowed down. So the DOF narrows and calculations should take that into account. Now the DOF will be calculated based on . Aperture . Distance . Sensor density (or MP, which ever is easier) With modern AF lenses the throw of the focus is short to facilitate faster focusing by the machine, hence the even if the DOF scale is given it is meaning less. With lenses designed for manual focus especially some macro lenses the focusing marker moves at least 180 degrees and in extreme cases 300 degrees. With that much movement the focusing scale will be at least an inch long and in case of a fat barrel upto 2.5 inches long. With that long a scale you can judge distances and set hyperfocal distance with DOF scale. With modern lenses the scale is between 1/4 and 1/2 of an inch so setting the distance manually based on the values on the scale is extremely difficult if not futile. That is why knowing the DOF depth and focusing ahead is the norm today. I wish that some day the camera manufacturers would incorporate a feature which would let us dial a distance and the lense would focus for that distance - a fairly simple feature as anyway the camera knows at what distance the focusing point is (the "D" part of Nikon D lenses). [/QUOTE]
Verification
Post reply
Forums
Lenses
Wide-Angle
Do you set hyperfocal or focus a different way?
Top
