|Carnivorous Plants Web Site
|Notes on Photography
|by Makoto Honda
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When using a non-CPU lens, you can input the lens data to the camera (focal length & maximum aperture). Doing so will enable color matrix metering, improve the metering accuracy of center-weighted and spot-metering, as well as iTTL flash accuracy. Also, the aperture information displays in the viewfinder/panel. Without this manual setting, pictures taken by a non-CPU Ai lens tend to be under-exposed by as much as EV 0.7. (I do not understand why this much discrepancy when D300 is supposed to be AI-enabled.)
To set the non-CPU lens data, the following two steps are needed:
1) Preset the data of your non-CPU lenses prior to use.
You can enter lens data for up to 9 non-CPU lenses. This is done quite easily in the SETUP MENU.
camera "button" and turn the main command dial until the lens number you
want appears on the camera-top display. This will set the lens data to
your camera. Each time you use your non-CPU lens, you just have to
make sure to select the corresponding lens.
CUSTOM SETTING MENU
Button+Dial - When pressed in combination with a command dial:
---- Shutter speed (for S or M exposure mode) or
Aperture (for A or M exposure mode) can be changed in 1 EV increment.
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