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

ISO 50 - Reduced DR on original DP's

Started Aug 18, 2015 | Discussions thread
PrebenR Veteran Member • Posts: 4,164
Re: ISO 50 - Reduced DR on original DP's

jande9 wrote:

Roland Karlsson wrote:

DMillier wrote:

ISO 50 is just overexposed ISO 100. It is useful for lower contrast subjects as you get a bit more exposure in the shadows. But shooting ISO 100 with +1EV exposure comp will yield the same file.

Yes, except that they are displayed and converted (by default) differently by SPP. The JPEG, the LCD and also standard SPP conversion, will render the ISO 50 image darker than the +1 compensated image. But, the RAW data will be the same.

ArvoJ wrote a little utility that you can use to change the iso tag in the raw file. It can be found here.

It works well and I had some fun playing with it.

Yes, and if I remember correctl, he wrote that utility because the exposure compensation in SPP has a limited number of steps, so you cannot recover an image if the ISO is set totally wrong. But, changing the ISOP setting you can.

Ah so one get a EV change larger than +/- 2 (in the old SPP) by tricking the ISO setting? Hmm, perhaps I got the wrong.
--
Gems are found off the trodden path; Sigma dp Quattro, Blackmagic Pocket Cinema Camera, Jolla Tablet, Linux

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