Читать книгу Outdoor Photography онлайн

20 страница из 86

Actually, the SLR finder image is a bit of an illusion. It is not a three-dimensional image; you aren’t literally looking through the lens. What you really see is the image projected by the lens on the focusing screen. When you look directly at the world, your eye has to refocus to look at distant or near objects (even although we often don’t notice that it’s happening). When looking at the SLR finder the eye stays focused at a constant distance (of course the lens may have to refocus to give a sharp image of things at different distances). And with your eye to the viewfinder of an SLR, the image becomes your entire field of view, and there’s a tendency to look at it piecemeal rather than in its entirety.

Next time you look into an SLR viewfinder, think about the fact that you are looking at a projected image which has no more real depth than the image on your computer screen. Let’s hope that this helps to focus the mind on the image as an image.

Another problem is that the viewfinder doesn’t necessarily show you the full picture area. Unfortunately, a true 100% viewfinder image is largely the preserve of professional SLRs – most others shave a good 5–10% off what you actually get in the image. Digital camera screens are much more likely to give closer to 100% view, but you should always check.