Aperture Priority Exposure Mode
when I arrive on location, the first thing I do is work out my fastest and slowest shutter speeds. Given the available light in my preferred I S O, I set the camera toe aperture priority exposure mode and I said the lens aperture to the widest setting and make a mental note of the shutter speed. This is the fastest speed available to me. Then I changed the absence of the smallest setting and again make a mental note of the shutter speed in. This is the slowest speed available to me now. This simple exercise very quickly tells me my shutter speed range for the conditions I'm working in. And that's important because as a wildlife photographer, shutter speed is almost always my dominant variable. Now you're probably confused. If shutter speed is my dominant variable, why don't I work in shutter priority exposure mode? The average lens has between six and eight. Stop variation and aperture from somewhere around 2.8 to about F 22. Most digital cameras have a 19 stop range in shutter speed f...
rom 30 seconds to 1 8000 With so many shutter speed, options is very easy to set a shutter speed for which there is no corresponding lens aperture available. For example, an average lighting. My shutter speed might be from 1/4 of a 2nd 11 thousands in very bright light. That range might be 1/30 June 8000 and in low light, it could be one second 21 2/50 in each of these scenarios. If I said to shutter speed outside of the available range, which is very easy to do when the cameras set to shut a priority mode, the camera will either continue to take pictures, all of which will be either under or overexposed. Or it will lock the shutter button and stop me taking pictures at all, neither of which is good by working an aperture priority mode. Because there are so few lens apertures compared to shutter speeds, there are very few lighting scenarios where there isn't an available shutter speed. Remembering that as I change lens aperture, the cameras automatically changing shutter speed, forming it shut us me that I'm looking at because shutter speed is my dominant variable. Now it may be that the shutter speed I want isn't available, but because I'm in control of the situation. I could make a decision about how I deal with that. So I could, for example, change. I s o I am in control, and that's the reason I almost always shoot in aperture priority exposure mode.