Quote Originally Posted by Chan Tran View Post
If I were you I would keep them all.
1. The Pentax is the only true spotmeter of the bunch so it would work as the spotmeter.
2. The Minolta is a great incident meter and it can measure flash too.
3. The Gossen can measure very low light, can be good for low light situation as well as for darkroom work.
Agree on all points.

The Exposure forum will give you plenty of information about how using the incident light metering and how, generally speaking, incident light metering is very precise and convenient.

Spot metering is the way to go when you want to place exactly the scene "tones" on your film curve and you have a scene, such as a scene with a wide brightness range, which makes exact exploiting of the film difficult. That happens especially with slide film. A spot meter will allow you to get an idea of where exactly the shadow will block and the highlights will burn in the final image.

For low brightness range subjects incident metering is just unbeatable, very fast, very accurate, no reasoning to make and no room for mistakes.