16

They allow you to make different creative decisions. Take Av (aperture mode), if you are creating a portrait, you will likely want a large aperture for a flattering shallow depth of field, so maybe you set it to f2.8 and let the camera figure out the best shutter speed. However, if you want to create a landscape, you want most of the image in focus, so you ...


13

What you are going wrong is not giving the camera enough latitude. You fixed the aperture and ISO, so all the camera can do is set the shutter-speed and flash power. It must be not as low-light as you think because most often you would get an under-exposed image doing what you are doing. The camera has a shutter-speed range it can use with the flash. The ...


11

Correct. As a matter of fact, on most cameras Program Shift is the same too by your logic. These modes, including Program, are designed to give you the same exposure which is why the results are the same since Aperture and Shutter-Speed are inversely related given a fixed ISO. The difference is what you decide on. Only you can decide if you would like a ...


10

This is actually a characteristic of the leaf shutter used in Fuji's X10/X20/X30 and X100 cameras. The leaf shutter can only travel so quickly. The wider the aperture is open, the slower the shutter speed has to be to accommodate the operation speed of the leaf shutter. It's a mechanical limit. In M and shutter priority modes, Fuji is allowing the faster ...


9

In Av (and Tv) mode, flash is not assumed to be primary light source, so camera will choose exposure to match metered ambient light. In P mode, however, the camera tries to ensure exposure time is quick enough for handheld shooting, and thus will happily expose for the flash-illuminated subject, ignoring the lack of ambient light. To put it in flash terms, ...


9

Yes. Constant Aperture is a reference to a zoom lens' maximum aperture at all focal lengths. It does not mean that it is the lens' only available aperture setting. That would be a fixed aperture lens. It some ways it is easier to shoot in aperture priority exposure mode with a constant aperture zoom lens than with a variable aperture zoom lens. (The ...


8

Fortunately, it's not actually voodoo magic. You have set a fixed ISO of 400, and you're in aperture priority mode, which means you're choosing the aperture and not giving the camera control of that. That means the one variable the exposure program can change is shutter speed. When you tell it you want the exposure to be two stops darker, the only thing it ...


8

Ok time to cut through a little of the confusion: Technically there should be no difference in exposure when using a smaller aperture in one of the automatic modes as the camera should vary the other parameters to compensate. You might see a difference in the extreme corners due to vignetting at wide apertures, but this would make the small aperture shot ...


7

Both of your changes were in the same direction with regard to shutter speed, not in offsetting directions. Keep in mind that exposure values (EV) with higher numbers are for brighter lighting conditions and require shorter shutter times, narrower apertures, or lower ISO. Exposure values with lower numbers are for dimmer lighting conditions and require ...


7

No. This sort of feature is available on higher level Canon cameras where you can have one or more sets of "custom settings", but not on an entry level camera like the 1300D.


6

Exposure compensation (for that is its name) allows you to adjust the exposure of a shot in the semi-automatic modes in situations where you think the light meter might be reporting 'incorrectly'. It essentially alters the zero-point of the light meter. Consider this situation. You are taking a shot of a man dressed in a light grey suit against a black ...


6

In the AV mode the camera decides on the settings to achieve what it computes as the best exposure possibly subject to constraint on the maximum iso and on the shutter time. This computation is made according, among other things, to the evaluation mode (that is: the camera will compute the "ideal" exposure based only on the central part of the image, or on ...


5

So why are there two different modes or what's the difference between them? Because trying to control aperture by setting the shutter speed and trying to predict what aperture the camera will choose is impractical. When you're taking a portrait, for example, you might want to choose a specific aperture. You can adjust the shutter speed in Tv mode until you ...


5

You are essentially correct in a simple case. It is really simply a convenience thing, though it does make a difference when dealing with more than 2 parameters. Don't think of it in terms of what the computer is doing, but what the person is doing. If I want to have control of the depth of field for creative reasons, I will choose Av. If I happen to ...


5

I think what you're saying is that the camera will pick the same total exposure in either mode. For example: Suppose you're in aperture priority mode with f/8 selected. The camera picks a shutter speed of 1/250 second. If you then switch to shutter priority mode and select a shutter speed of 1/250 second, you find that the camera picks an aperture of f/8. ...


5

According to the Pentax K50 and K10D manuals, in P mode, if I select aperture, then program will choose a corresponding shutter speed, and if I specify shutter speed, then camera will select a corresponding aperture. Not entirely true. After reading the manual, you can't set values other than ISO. Av & Tv lets you set the aperture & shutter speed (...


5

In each of the 4 photos, the amount of sky and foreground has changed. The sky is very bright and everything else is much darker. This makes for a very challenging exposure for any camera. The camera metering had to decide between the light and dark areas and come up with a guess as to what the correct exposure should be. Your camera actually did a very ...


5

In A,S,P,M modes, you have to turn Auto ISO on, in Setup menu, see manual. Auto ISO is automatically ON in Auto mode, but is not automatically ON in A,S,P,M modes, not unless you turn it On. User has choices unless in Auto mode. In A,S,P,M modes, you manually open the popup flash if you want to use it, and don't if you don't. You set Auto ISO On if you ...


5

Yes. Usually, the f/2.8 notation just tells you the maximum aperture (greatest diameter), but it does not say anything about the smallest aperture (smallest diameter). E.g. a 70-200 mm f/2.8 can keep its maximum aperture all the way from 70 mm to 200 mm, but you can always choose a smaller aperture, e.g. f/4 or f/11 (just two random examples - usually, you ...


5

There are two misunderstandings in your question. As covered already by Michael and flolilolilo, "constant aperture" means that the widest available aperture (smallest f-number) is constant across the zoom range; it doesn't mean that the lens can only shoot at f/2.8. Suppose that you did have a hypothetical lens that could only shoot at f/2.8. Then you ...


4

Aperture priority mode works just fine with a manual lens (or no lens at all) on my Canon 550D so I assume it will work on a 60D What happens is that the camera display shows an aperture of "F00" and the camera will set the shutter speed based on the amount of light it can see (making the result picture exactly the same as if you set the aperture in the ...


4

The maximum aperture (minimum f stop) of your lens is different at different lenghts. For this reason, if you set up 3.5 at 20mm and then zoom to 80mm it will be automatically reduced to 5.6 (the maximum possible). If you set up an f stop high enough for your maximum focal, it will not change as you zoom: have you tried it in practice? What will change with ...


4

1) Yes & No. See pages 47-50 of your D3200 User Manual. You can select Fill flash, Red-eye reduction, Slow sync + red-eye, Slow sync, and Rear-curtain + slow sync while in A mode. All of these modes can automatically calculate the amount of flash power used to correctly expose the shot. The Auto (auto flash) mode that will determine if you need flash and ...


4

In my experience (with a Canon, not Pentax, but it's probably similar), P mode is part-way between Auto and Av/Tv modes. The difference between P and full auto is that you are given the option of making creative adjustments, if you want. The camera will use its auto algorithm (or something like it) to choose an aperture and shutter speed, and you can then (...


4

The main way you balance out light against your needs for the image is the "exposure triangle" of the three main settings: ISO, aperture, and shutter speed. You have to choose your priorities: noise (ISO), depth of field (aperture), or the possibility of blur (shutter speed). Outside of these three settings, however, you do have two other options. You can ...


4

Aperture Priority is an Automatic mode. In all Auto Modes the camera will automatically set what it thinks is the correct exposure. Changing the Aperture, Shutter or ISO or will not change the exposure if any one of them are in "A" or "Auto". If you want additional control, you must use the Exposure Compensation dial to lighten or darken the photo.


4

In your situation I would be using manual mode. If you really want to use Av mode, then you must disable "Safety Shift". You can disable it in the custom function menu. It is at the bottom of the C.Fn1:Exposure page in the camera menu.


4

Originally you asked the camera to overexpose by one stop. When you set exposure compensation back to 0, the exposure time was halved. When you increased the ISO sensitivity by a factor of two, the exposure time was halved again. So you would expect an exposure time of 1/400s. That you got 1/500s instead is essentially a rounding error. The exact value would ...


3

Several settings could be causing your D40X to demonstrate the behavior you are describing when you are also using the built in flash. Check Custom Setting 10. If it is set to 'On' and the Minimum Shutter Speed is set to '1/60 sec', then the camera will increase the ISO rather than allow the shutter to be slower than 1/60 sec (see page 76 of the D40X Manual)...


3

Yes, this is normal. Assuming that this works the same on the D7000 as the D7100, search the manual for "standby timer". The c2 custom setting (on the D7100) controls for how long the settings can be changed after a half-press of the shutter button. The default is 6 seconds. You can increase this or set it to "no limit". Quoting the manual: The ...


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