On Sep 18, 2005, at 4:04 PM, Mark Erickson wrote:
On the other hand, "green-button metering"(also known as stop-down
metering)
may be more accurate than open-aperture metering because it takes
the meter
reading with the lens at the same aperture as will be used to
actually take
the picture. In addition, if you're shooting at or near wide open
or in
good light, the meter sensitivity issue is not likely to be a problem.
My observation is that the AF series lenses (DA, FA, F, FA-J, D-FA)
on my DS tend to produce more consistent exposures than either A or K/
M lenses with both my DS bodies. That said, I've learned how to
correct the exposure readings to my satisfaction.
All K/M lenses hit the bottom point in the metering system at about 2
seconds. Whether that's a functional limitation of the lower light
getting to the metering system or simply how Pentax wrote the
algorithm in the camera's firmware, I don't know. A and AF series
lenses can meter out to 30 seconds with the DS.
Have a nice day. I'm going to go take some more pictures of my new
daughter....
I'm working on prints myself. :-)
My truism of the week is:
"Most cameras' annoyances and foibles become greatly reduced in
significance when you learn a particular camera/lens/sensor's dynamic
characteristics well enough."
Godfrey
