I was helping a friend move, and she found an old FM2n camera that she let me have. I know very little about it, but after reading the manual, and playing around with it for a bit, it looks to be in good shape (except that the depth of field preview lever is completely stuck).
I tried to check the exposure meter by comparing it to my D90, and it comes up with the "+ 0" rather than "0" at the exact same settings and lens. As I'll be using black and white negative film in the camera, which should be overexposed rather than underexposed, would it be okay to set the iso to be lower than the films actual rating (so if the film was iso 400, set the dial to iso 200) and shoot when the exposure meter shows anything from "0" to "+ 0", or am I overthinking the situation?
Any advice or recommendations are gratefully appreciated.
Even with the same lens, the field of view of the D90 will be different than the film camera. I've seen cases where even with perfectly blank walls, there can be an illumination difference that the eye tends to forgive (the meter doesn't).
I don't think 1/2EV (the +0 indication) will make that much difference with the B&W film, but if you find that your testing does result in a consistent 1/2EV difference, you can always do as you say and re-rate the film accordingly. I always re-rated my B&W films as I meticulously calibrated my exposure, development, and printing using bulk film and paper. It's just deciding on what you want it to be and keeping your developing chemistry and agitation consistent.
Roger It's still, ISO, aperture and shutter-speed, right?
The +0 or -0 indicate you a fraction of a stop off what the camera considers perfect. If you got 0 alone you would be dead on.
Comparing metering between a FM2n and a D90 is difficult.
The FM2n has a center weighted meter and is full frame/FX.
You didn't say what metering mode you were using on your D90, but if you were using Matrix, the weighting of the different areas of the subject would be very different than the FM2n. Also the D90, being DX format, would have a different angle of view if you were shooting from the same position
Given that you were within a fraction of a stop between the 2 cameras tells me that the FM2n metering is working properly.
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