Originally posted by arbutusq Actually RiceHigh my experience is that this leads to overexposure on the FA lenses as opposed to underexposure on the DA lenses. I frequently need to dial a negative EV with my FA lenses to avoid blown highlights.
The issue that my photos show is not the Pentax Exposure/metering system but the construction of the lenses. At f8 and 1/60s the 28-70 lets in more light than the 16-45. On my K100d this leads to generally accurate exposures with my DA lenses and blown highlights on my FA lenses.
Ahah!
I made a couple hundred shots outdoors in Boca Raton last week at all times of day from blazing sun to rising/setting to overcast. Almost all were in verdant greenery of some interesting feature or landscape/trail, and every one had a bright highlight somewhere, whether it be an opening in the canopy or a bright walk with light hitting it or a bright item in the background or the petals of a white flower.
Every single image had blown highlights - nice, centered histogram except for a spike through the roof at the right or left margin (and blinkies in every preview).
All were A, F or FA lenses, usually in AV or M (I even tried G for the first time ever on this camera), always set to "A" and using the e-dial for aperture control. I messed with ISO - everything I could think of!
Digital newbie that I am I tried filters (CPL helped for full beach shots), changing metering patterns and even hand metering a gray card with a Studio Deluxe (I still think film) - until I despaired of getting it right.
For the Canikon fanboys lurking here I NEVER thought it was my K10D - I just gut frustrated by user error.
Now I know what to try in similar conditions!!! (How could I forget to "pull" the sensor?)
P.S. - RiceHigh is on my ignore list, so I didn't see his comments.
[EDIT] Next day - I just experimented with a K200/4 and a K50/1.4 (settings are irrelevant) shooting blooming Hosta (white flower stalk against deep green leaves in shade). By intentionally reducing exposure 2 steps I was able to eliminate overexposure.