I'm thinking of using my screwmount Leica to shoot slide film, and I'm not accurate enough to estimate for slides, at least not yet! Therefore, I need a lightmeter to use. I have a Pentax Spotmeter V, but it is far too large to carry around everywhere, plus it is pretty conspicuous. I've been thinking of using the Olympus XA as a meter, setting the ISO of the film on the XA, selecting a aperture, and reading the shutter speed in the VF. I've compared it to my spotmeter, and it is pretty accurate, though obviously slightly less so because of the wider area. However, exposures checked using a DSLR turned out well. So, do you think this is a viable option, at least until I save enough for a Gossen Digisix or something similar in size?