cwp3420 wrote:
I have never used a hand held light meter before for getting the proper settings for a good photo. I am interested in low light shots of landscaping in thE mountains. If I want to take a photo with my Fujifilm XT- camera and get it right the first time, do I meter the scene with the light meter, and then the light meter give me information such as that I would use an ISO setting of 400 along with a speed of 1/250 of a second and expose for 14 seconds, and if I do that, will it give a pretty accurate photo of what I was looking for? I'm trying to understand what a good light meter will do to aid my photography. Thanks! Carl
I have never used a hand held light meter before f... (
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Depending on your subject matter, especially with low light shots where some light is part of the scene (bright sky at horizon just after sunset), it will be a challenge to use an incident or reflected light meter, unless you have a spot meter. Being able to isolate small areas of the composition and measure the amount of light they reflect or emit is a very accurate way to establish a good exposure, and more importantly, when the brightness range is beyond the camera's ability to record the scene in one take.
Incident meters are best when you have a brightness range that is less than the camera's dynamic range capability. In studio, or outdoor medium to low contrast scenes, etc are going to give you extremely accurate readings.
You will often see the explanation comparing reflected vs incident using three cats - a black one, a gray one and a white one. The reflected reading off the black cat will make it gray, the gray cat very light, and the white cat overexposed and completely without detail. However, if you use an incident meter, you are likely to get each cat in the correct tonal range.
The problem with this oversimplified example is that it assumes that the same light is falling on all three cats. Let's change that up a bit - and place the white cat in sunlight, and the other two in shade. The incident reading will most definitely indicate a correct exposure for the the gray and black cat if you read the light from the shade, but what about the white cat? It will be blown out. If you read the incident meter in the sunlit area, the white cat will look fine, but the other two will be under exposed. This can work, provided you can actually place the meter in the bright area, but such is not always the case.
Understanding the Ansel Adams Zone System will give you the ability to use the reflected light meter, the excellent one in your camera, to make exposure decisions based on what the camera actually sees. Using the spot meter mode, in the example above, you can read the white cat, then ADD 1-1.5 stops more light than what the meter indicates, to bring the white cat from middle gray (using the meter's measurement), to a lighter value. Exactly how much will depend on your gear, and your experience level. Once you learn how to evaluate a reflected reading and use it to assign the correct tonal zone to an element in the scene, your exposures will always be on the money.
In the above example, where they three cats are in the same light, you can read the white cat with the in-camera spot meter and add more exposure, read the gray cat and use the meter's suggestion as is, or read the black cat and subtract exposure. Whichever way you chose to do it, you will always end up with the right, and in this case, the same exposure.
When you have a brightness range that exceeds the camera's capability, then you have the option to shoot two images, one for the highlights, and the other for the shadow or darker areas. Or you can just shoot for the highlights and let the shadows fall where they may. An incident meter is not going to be as convenient in this situation.
I have and use several meters - in studio I use a Gossen Luna Pro SBC with it's flash attachment - to set accurate light ratios and measure the cumulative effect of multiple lights on the subject. There is no better way I know of to get consistent results.
When outside, I will sometimes use my old Minolta 1 degree spot meter, but I've grown lazy and found it easy enough to get the exact same results using the in camera meter.
The Zone System is the key, and I suggest you study it and own it. You will never have an exposure issue again.