dchoogl.blogg.se - Non fisheye lens

#NON FISHEYE LENS FULL#

This can cause more chromatic aberration if the lens doesn’t correct for it well.

Light rays from the edges of the image are going to be bent a lot more passing through the lens elements in a wide angle lens than in a telephoto lens.

But those few differences can be important, so let’s go over them. If all you shoot with a wide angle lens are landscapes where the subject is out at infinity (let’s say, where the little blue lines, that symbolize the angle of view, end), there would be only a few differences. Others really only are noticeable when working closer to the lens. Some differences are true at any distance, even out to infinity. That wide angle of view causes some different behaviors.

Here, I’ll show you:īut the difference is so obvious that you might miss the subtle meaning of it. So what’s so different with ultra-wide lenses?ĭuh! The angle of view is wide. Down in these ranges, lenses behave differently, and, if you understand those differences, you can get interesting and unique images: not just a nice landscape, but some other dramatic shots. Other bodies have slightly larger angle of view with 1.5x crop frames.)Īnyway, I define ultra-wide as 80 degrees or wider (twice the ‘normal’ 40 degree angle of view), which is about 21mm on a full-frame camera or about 14mm on a crop sensor.

#NON FISHEYE LENS FULL#

The angle of view of various focal lengths on full frame and crop frame cameras. (The difference in angle of view between 12mm and 16mm is much greater than the difference between 50mm and 70mm, for example.) The table below gives you an idea of the angle of view at various focal lengths on both crop-sensor and full-frame bodies. The 4mm difference is very significant, resulting in a change in angle of view from 83 degrees to 112 degrees. The photos below, for example, show the same scene from the same spot shot at 12mm (left) and 16mm (right) on a crop-frame camera. You get a much better idea of how wide an ultra-wide image will be if you think in angles, rather than mm.

It’s important to realize that at the wide-angle end of things a couple of mm of focal length can make a huge difference in the angle of view. Back in those days all cameras were full-frame, because cavemen only had film. (These are for full-frame cameras, of course. Depending on who you read, ultra-wide angle lenses were less than 24mm or less than 20mm. So, since back when cavemen made the first lenses by chipping milky quartz, it has commonly been considered that 50mm was the ‘standard’ focal length. I’m going to limit this discussion to non-fisheye lenses. The definitions are arbitrary, of course, but first let’s eliminate fisheye lenses: they are ultra-wide by strict definition, but are usually used for entirely different purposes. That’s too bad, because the ultra-wide lens, even more than the telephoto lens, can really put some punch into your photography. Other people just decide “I don’t shoot ultra wide” and never try it again. When they get home, they realize many of their ultra wide shots are awful, but they aren’t sure why. We also see people struggle at the opposite end of the focal length range: they know that they want a wide angle lens because they are going somewhere with broad scenery, or need to get images in small, crowded areas, where they can’t step back.

A while back I wrote a blog on Getting Sharp Telephoto Images when I realized a lot of our renters were using big telephoto lenses for the first time and didn’t know the tricks it took to get good telephoto images.