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6

When you say "light blue" is lighter than "dark blue" you may be mixing two concepts together without knowing it. In one sense, the colors light blue and dark blue are two different colors - that is, they are a different proportion of the three primary colors. You could also be talking about different brightness levels within the same proportion of color ...


6

The unit of measure for brightness is the lumen. I know it is used to measure the amount of light emmited from a source. But in your question, I think you are talking about the reflection of light off a source. I may be wrong but I think it is also measured in lumens. The presence of black (in your example of dark vs light blue) shows lower lumen units ...


6

You need to shoot at either sunrise or set (sunset is generally warmer in tone), when the sun is very low in the sky. Shoot with the sun behind the model (taking care not to look directly at it if possible). As you are shooting into the sun, you need some light source to light the front of your model: this could either be a diffused flash or a reflector. As ...


5

It is not. What you are referring to is sensitivity to light. That is the ISO sensitivity is for and while there is a standard that describes it, digital sensors do not match exactly the posted sensitivity. A site like DxOMark actually measures ISO equivalence as part of its sensor benchmarks and you can commonly see a difference of ±1/3 EVs. The other ...


5

Theoretically both images should be the same brightness, even though the NEX sensor is larger, it stills receives same amount of light per unit area both lenses were set to f/3.5. The difference in brightness is due to different processing, there's nothing in the ISO standard that guarantee the same digital brightness values given the same exposure and ISO ...


3

There's a bit of post production going on in that image that is probably clouding things somewhat. If you look at the area at the top of the image it's clearly been blown out (overexposed) and then brought back from pure white to a dirty grey pink colour. This says to me two things - the contrast of the image has been lowered so that the blacks and whites ...


3

You can't, you can see why with a simple experiment: Walk into a very well lit room, set the camera to aperture priority (Av) and select reasonable exposure values (for example, f/5.6, ISO 400) also set the camera to capture raw files Turn off all the lights so that the room is fairly dark, take a picture of one of the walls (if you don't have a tripod it ...


2

Looking at an eBay auction description, your Kako 720sd specs out with a guide number of 28-40m (I'm assuming that's across the zoom range of 28-85mm), so chances are that this is a pretty decently-powered speedlight (e.g., in the neighborhood of 30m when zoomed to 35mm), in the range of most of the hotshoe flashes you're going to find. Going to a new ...


2

This is physically impossible. Without active amplification, the luminance of the image can not be more than the luminance of the subject. Otherwise you would be violating the second law of thermodynamics. If you try to focus the sun rays on a black body, it can get really hot, but not hotter than the surface of the sun itself. For a mathematical proof, read ...


2

When you have a relatively dark subject and a very bright background you are not going to be able to capture both in a single frame, so your options are: Decide you really wanted to get a silhouette or white background Sometimes you just have to make due with what you have Combine several frames Shoot several frames at different exposures and combine ...


1

Increase the exposure via a slower shutter speed, wider aperture, or a higher ISO... Exposure compensation will also do it in basically any mode, set it to over expose the image. You could also lighten the subject in post processing although that typically isn't preferred unless it is your only option.


1

In general, most camera LCDs are much higher contrast and much higher saturation than a general purpose computer monitor. They are tweaked this way because it makes the images look more vibrant on a small and low resolution display, but without more careful adjustment, they would look very artificial on a larger, higher resolution display at the same ...



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