Originally posted by Stevopedia Hey gang,
This Christmas I bought myself a used *ist D for a very nice price. It's a realy nice camera and is practically new (aside from the almost 13,000 shutter actuations).
Only problem is, it seems to consistently underexpose by at least 1 stop, with every lens and under every light source.
How can I fix this (aside from the obvious exposure compensation)?
Lowells correct opinion aside (110ish) you may find that the D is more in the 90 range... 1/2 stop off the more common 110, and a full stop off the Canon (on some models) 126.....
this (90ish) is just how Pentax had the D calibrated and boy did THAT cause a stir..
Anyways see this:
Headroom in Highlights : Where is Zone V in The Digital World? | LibRaw
According to this the "real" value is 101... ANSI standards pretty much left a fudge factor of 1/2 stop so all (except Canon
) are correct
So, in the perfect world of a spot-meter calibrated to ISO standard and pure gamma = 2.2 transform of perfectly linear data coming from the sensor, the neutral surface should render 101 RGB if exposed according to the spot-meter; next stop is 138 RGB, then comes 189 RGB, and finally we are getting clipping increasing exposure full 3 stops instead of 2.97 stops which are the theoretical limit as it was shown above.
ONLY major problem w/ the D is that you only have +/- 2 EV compensation which is sometimes not enough and you just have to work around it BUT the 6MP really work in your favor. you can really push/pull the files quite a bit without creating too much noise...
After having spent some time w/ a K200 I find I miss this. The D was a very forgiving camera, unfortunately later models, though more socially acceptable, have lost that edge it seems. At least based on my limited experience....and my opinion