> > "harrogate2" wrote...
> >>"Paul Andrews" wrote...
[quoted text clipped - 33 lines]
> and spare film all the time. A roll of film to practice with
> and develop before he goes would be very worthwhile.
> "Chris Bacon" wrote...
>>>"harrogate2" wrote...
[quoted text clipped - 21 lines]
> three years with 'average' use so there shouldn't really any problems
> in that area if a new battery were used from the start.
ISTR "average 15 rolls of film per battery", 'though ICBW. I liked
the "water resistant" reputation of the camera (although I tried
hard to take care of it, and it did not get more than a drop or two
on it), and the simplicity, coupled, as you say, with good results.
I'd still take at least one extra battery, though, as the cost is
not huge, and if you're just about to take a picture of something
*really* interesting, for instance a huge spider on the wall of a
cave, and the battery packs up at that very instant, it's proper
vexing. The only thing I disliked is that it was "long", rather
than "wide", so I might perhaps consider the 28-105 or whatever the
thing is. You can tell that my grasp of the intricacies of pracktickal
photography isn't the best, can't you? Suffice to say, I'd sometimes
rather have got more in the picture at close range rather than being
able to zoom in to some vague smudge a long way off. Whatever is taken
buy more batteries anyway, some people do a lot of fiddling about and
zooming in and out using battery power to see what I can see (!), and
a camera of this sort with a flat battery is worse than useless.
> Aldi have been doing Agfa 200-36
> in twin packs at £1.99 for some time, or similar Kodak if not Agfa. My
> personal preference would be Agfa as it is much more tolerant of
> exposure errors - +/-2 stops is generally not a problem.
Aldi still have some film of this nature, although no "stops", whatever
they may be.
:?
harrogate2 - 24 Mar 2006 08:13 GMT
Stops are the exposure settings.
For the benefit of the non-knowing:-
Photographic exposure can be equated to a bucket and a water hose. For
any given size of bucket it needs a fixed quantity of water to fill
it. Use a small bore hose and it will take a long time to fill, use a
large hose and it will fill much more quickly.
The speed rating of the film (in ASA) is the reciprocal size of the
bucket, i.e. the higher the ASA the smaller the bucket.
The size of the hose is the aperture setting of the iris.
The time for which the hose must be on is the exposure time.
The capacity of the bucket is the quantity of light required to
correctly expose the film
The steps of exposure time and aperture are the opposite of each other
and are called 'stops.' Increase the aperture by one stop (actually
halve the area of the hole through which the light passes) and you
will have to double the time that the shutter is open - remember a
fixed quantity of light/water is required for correct exposure.
Some films, especially slide film, needs to be accurately exposed,
usually within 1/3 of a stop. Print film however is much more
tolerant, which is what I was saying when I stated that you should be
able to get a useable picture off a film frame that has been
incorrectly exposed by 2 stops or a factor of 4 - that is it has been
exposed to anything from one quarter to four times the correct
quantity of light. If the whole film has been exposed at the wrong
speed setting then it can be corrected in the processing PROVIDED the
person developing it has been told.
--
Woody
harrogate3 at ntlworld dot com
Roger Whitehead - 24 Mar 2006 11:08 GMT
> The speed rating of the film (in ASA) is the reciprocal size of the
> bucket, i.e. the higher the ASA the smaller the bucket
If you instead make the speed rating equivalent to the rate at which the
water is being supplied, all the items of the analogy work in same the
logical direction as their analogues.

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Roger