Pls show examples where increasing brightness in post better than increasing ISO.

Started Oct 1, 2013 | Discussions thread
bobn2
Forum ProPosts: 30,896
Like?
Re: Pls show examples where increasing brightness in post better than increasing ISO.
In reply to Andre Affleck, Oct 2, 2013

Andre Affleck wrote:

bobn2 wrote:

ultimitsu wrote:

bobn2 wrote:

So, mostly the metering is checking highlights. The easy technique is to set 2 1/2 or a bit more stops of EC and spot meter off the highlights (if your camera lets you use EC in M). On most camera there are a few ISO settings to be working with, and you know those pretty well anyway.

This sounds quite interesting, can you elaborate a bit on how it works? why 2.5 stops?

Your meter should be calibrated to centre when it gets 18% grey as the nominal exposure (10/ISO lux seconds).

I always thought it was 12.7% for digital meters. 18% was for film. That's why when you use an 18% grey card with digital you have to compensate a 1/2 stop.

Could that be your error?

The Wikipedia page explains it all. Saturation based ISO is set such that 18% grey is 12.7 for an exposure of 78/ISO lux seconds. That makes saturation 1/2 stop above white, the reason being that there are things in the scene brighter than a white card. So, on SOS it should still be calibrated so that 18% grey is given by 10/ISO lux seconds exposure.

-- hide signature --

Bob

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