Bill Brant (brant@phibred.com) writes: [most deleted]
> I've come to believe that my camera has problems metering subjects
> that are red in color. I have noticed this problem when I am taking
> close-ups of red flowers, and the flower more-or-less fills the
> frame. [.......]

You have run across meter color error that is common to most recent meters (Selenium cell meters are not so bad....). Bad advice: zoom
lens instructions that tell you to focus at the long end, then zoom
back - and camera instructions telling you to just go ahead and put
any filter on the front and believe the TTL meter.... To check the
"filter factor" for a filter color, meter an evenly illuminated grey subject without the filter, then do the same with the color filter in place. Adjust the ASA or compensation ring until the reading is correct
for that filter with its filter factor applied. The difference is the
"filter factor" that needs to be applied to the camera when that filter is used. (For instance, if I measure a sidewalk without a filter and
get 1/125th at f8, then put on a 2-stop orange filter and change the
shutter speed to 1/30th for the correct compensation, my meter will
read 1/30th at f11. Putting +1 on the compensation dial, or dropping
the ASA to half will restore the meter reading to the correct 1/30th
at f8, so the "FF" is +1 stop for my camera with an orange filter.)
Factors for my Nikons: dark yellow (+ 1/2 stop), orange (+1 stop), red (+ 1.5 stop).
When shooting bright, clear similar colors that are the primary
metered area, the same "FF's" can be applied. When using TTL flash, somewhat gentler "FF's" work for me (about 1/2), especially if the brightly colored area does not occupy the majority of the image field.
Hope This Helps