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
Photography Q&A
"Automagic" ISO setting on a DSLR
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="pforsell" data-source="post: 674786" data-attributes="member: 7240"><p>To be more exact, the ISO of films represent the combination of <strong>the emulsion + the developing</strong>. Some companies sell/sold the exactly same film emulsion with different speed ratings (Ilford, for one), where the only difference was the recommended developing. (I'm not talking about push/pull processing, but the actual ratings printed on the film box.) One might think the camera ISO as being part of the developing - just like it is with films - and in this sense the digital and analog ISO speeds differ very little.</p><p></p><p></p><p></p><p>There's situations where one scenario is better than the other. In a wildly changing lighting Auto ISO might be useful. In constant lighting perhaps manual setting is better - I trust my own judgement better than the camera's.</p><p></p><p>In any case, I think that <strong>ISO last</strong> is the preferred approach. First determine your DOF requirements and action stopping requirements, and set aperture and shutter speed accordingly. If this leads to low exposure, then adjust ISO upwards as much as you can while taking care to not clip any important highlights in the image. This approach goes by the name ETTR, expose to the right, where the "right" refers to the histogram display of your camera.</p></blockquote><p></p>
[QUOTE="pforsell, post: 674786, member: 7240"] To be more exact, the ISO of films represent the combination of [B]the emulsion + the developing[/B]. Some companies sell/sold the exactly same film emulsion with different speed ratings (Ilford, for one), where the only difference was the recommended developing. (I'm not talking about push/pull processing, but the actual ratings printed on the film box.) One might think the camera ISO as being part of the developing - just like it is with films - and in this sense the digital and analog ISO speeds differ very little. There's situations where one scenario is better than the other. In a wildly changing lighting Auto ISO might be useful. In constant lighting perhaps manual setting is better - I trust my own judgement better than the camera's. In any case, I think that [B]ISO last[/B] is the preferred approach. First determine your DOF requirements and action stopping requirements, and set aperture and shutter speed accordingly. If this leads to low exposure, then adjust ISO upwards as much as you can while taking care to not clip any important highlights in the image. This approach goes by the name ETTR, expose to the right, where the "right" refers to the histogram display of your camera. [/QUOTE]
Verification
Post reply
Forums
Learning
Photography Q&A
"Automagic" ISO setting on a DSLR
Top