7 Basics about Camera Lenses | Digital Cameras


We’re going to talk a little bit about digital
camera lenses or just camera lenses in general. Now, any DSLR camera, which stand for Digital
Single Lens Reflex with the word lens in there, has a lens that affixes to the front of the
camera. Something kind of like this. This happens to be a wide angle lens. There are many, many, many different kinds
of lenses. This one in particular zooms from the focal
length of 17 millimeters, which is quite wide, into a focal length of 35 millimeters. Now there’s other lenses out there. This would be great for shooting something
like rock and roll. This, on the other hand, is a 70 to 200 millimeter
lens. This is better for stuff like fast action
sports, football. Now, not all lenses zoom like the two I just
showed you. This one over here is just a fixed focal 85
millimeter lens. Really good for portrait photography. So this vast number of lenses gives you a
lot of options in terms of what you’re shooting to get the kind of look that you want. It’s just going to be a nice tight crop with
no distortion. Whereas this wide angle lens is going to have
a lot of distortion, but you get a lot in the frame. So like I said, all digital SLR cameras need
a lens to take pictures otherwise you just have a mirror and a sensor in there. Simply take your lens, remove the caps, and
attach it on. And that’s one of the nice things about digital
photography if you have an SLR, is you can switch your lenses out. Whereas, if you’re using a point-and-shoot
camera, the lens is fixed and you obviously can’t remove it. So when you take a picture, what the lens
physically does is there’s multiple elements inside of this and those elements bring the
light in, obviously into focus, and direct it back into the sensor that’s behind the
mirror. That’s how you get your image. The better the lens quality, the better the
image is going to look. Finer lenses, more expensive lenses have just
better ground glass with better coatings that help get rid of lens flair, chromatic aberration. And that’s just a couple of basics about lenses
for digital SLRs.

5 Replies to “7 Basics about Camera Lenses | Digital Cameras”

  1. Interesting guide. I feel like there were a lot of terms thrown around without them being explained. I understand that some companies believe that a shorter video is a better video this video has definitely shown the negative side of that. To improve, please assume that the viewer knows absolutely nothing and explain every camera-based term that is mentioned.

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