Roger Hicks
Veteran
In my opinion..using a spot meter is not as important as finding your own personal EI / dev times and testing your chosen materials to get what you want..you cant get detail if is not recorded on film.
Thanks
The only way to be absolutely sure of getting adequate exposure in the shadows is to meter the shadows directly. You can do this with most meters: the main reason to use a spot meter is that you don't have to get as close.
If you use the main index on the exposure meter, a direct shadow reading implies giving 2-3 stops less exposure than the index indicates, though a well designed meter should have other indices as well: you'd use the shadow reading index (I.R.E. 1, U on a Weston, etc). There's quite a fair introduction to over- and under- indices on exposure meters in http://www.rogerandfrances.com/subscription/over-under-indices.html.
If you take general readings without taking any account of the actual shadow readings, the only possibility is to overexpose and hope, which is pretty much what you're describing. Yes, you can fudge the reading on the basis of experience, but it's a fudge, not a reading.
Regardless of all this, and shorn of Zone jargon, 'expose for the shadows' means 'give enough exposure to get detail in those dark areas where you want detail', so it can't mean giving LESS exposure, and 'develop for the highlights' means 'if the highlights aren't that much brghter than the shadows (low subject brightness range), give more development, and if they're a lot brighter than the shadows (long subject brightness range), give less development'.
Cheers,
R.