Exposure – Light Meters

Meters come inside the camera and external, spot meters and incident meters (usually with a little white dome).
They don’t/may not neccesarily work to yeild proper exposure out of the box or int the camera when purchased.
They most likely need to be calibrated.
They may be off from the rule of f 16 exposure guide. (Use a gray card to verify)
Another problem, they all measure infrared light.
That’s great when you are shooting infrared film.

You don’t really need one. You can get by without one.

But If you must have one try to get one Modified by ZoneVI from Ebay.   Great for inside, early morning, and late evening.

Pentaxspot          MeterWhoster

Modified light meter (filter to not measure infrared light, calibrated, re-coated inside with extra black paint)

meter_w_gray

1 modified, 2 not modified MINOLTA DIGITAL CAMERA

The Zone System
http://en.wikipedia.org/wiki/Sunny_16_rule

HAVE YOU EVER HEARD OF FRED PICKER? | jbhphoto.com Blog

Paul Butzi Zone VI Meter Modifications Reprised
http://www.butzi.net/articles/zone%20VI%20reprise.htm