I have what seems to me a particularly tricky shot. I want to photograph sunlight reflecting off a small stream, with a few small trees on either side. My camera is a k1000. My first impulse is to use low iso, like 100 or 50, fast shutter speed and a small aperture. Has anyone else tried such a shot? Any pointers?
When you are shooting 35mm you should "bracket". Set the camera up and shoot it every which way. Keep frame by frame notes of the different settings so later you can see what is happening.
Specular reflection are very bright compared to surroundings and you probably can not get surrounds and specular reflection exposed properly on the same film.
If you are trying to capture the reflection of trees in water, it is easy. Expose for the landscape and the tree reflection will will expose in a suitable manner.
If you expose for the reading from your TTL meter, you will get dark, oily looking water.
Originally Posted by mpilting
Just imagine, how much brighter do you want the water to be and ADD exposure (open up the lens or extend the exposure time).
I think -to get reasonably "natural" looking water- you would need to INCREASE the exposure (above that suggested by your meter) by about two to two and a half stops: this will give you bright water with visible detail. Give it a go! :)
Another way of doing it, would be to look for something mid-gray (weathered wood, bitumen, gray stone) in the same light as the water, take a reading on that (get very close and measure at right angles to the sun, avoiding glare) and expose accordingly: the tonality of the water will then fall naturally into place, but (depending on the exposure latitude of your film) the details may be blown out.
With this technique, the ISO of you film is relatiely unimportant, except that -as I understand it- with colour negative film, the faster (ISO 400) films have a greater exposure latitude (can cope with a greater subject brightness range) than the slower (ISO 100 or 200) films.