Learning Photography [Was: Web weirdness]
msergeant at messagelabs.com
Wed Jun 20 19:50:15 BST 2007
On Wed, 20 Jun 2007, Luis Motta Campos wrote:
> I'm sorry if I look sarcastic. It wasn't my intention (at least, not at that
> I'm genuinely interested.
Ah sorry - Dave has the right link. The list traffic is VERY low, having
sporadic bursts. We need to get over that mailing list threshold of
continuous postings (which in my estimates takes about 400 subscribers).
I recommend a good book covering the basics of photography. Something like
John Shaw's Nature Photography Field Guide is excellent (though with a
strong slant towards nature photography, obviously) and covers all the
simple issues like what is an f-stop and how it relates to ISO and shutter
speed. The basic equation is that to maintain the same exposure, a full
f-stop changed (which in this example was f-11 to f-8) you will have to
double the exposure time (from 1/400 to 1/200). Same goes for ISO (i.e. to
keep at 1/400 you'd have to change from ISO 200 to ISO 400).
But I highly recommend the book - it covers all this a whole lot better
than I can.
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