9:15 am - Photography Basics
At this point everyone can just kind of relax because I'm going to go through some photography basics in here and so this is just too get everyone up to speed somebody who was hoping for a basic photography class we're going to give you a five minute little basics on photography so the cannon sixty is a single lens reflex camera which means we have one lands in the lens huge part about the camera of course, because we see wide angle we see telephoto there's lots of different lens choices out there when you focus the lens or when the camera focuses lens there's lens elements that move back and forth in order to focus the light properly as it comes in as the light comes through the lands it goes through an aperture on the lens and the aperture is this little opening that can get wider or smaller and it never completely closes down but a lens that opens say from one point four down to have twenty two will look like this and each time we change one setting one f stop setting we're letting ...
in half assed much light or for opening up we're letting in exactly twice as much light and so this is the first way that we can control the amount of light coming in the camera now beyond just controlling the amount of light this also controls the depth of field or how much is in focus in this case, the cameras focused on the number seven, and you can see the little red hash marks over on the right hand side and they are growing. You might say the depth of field is getting larger and so, with each setting, we are changing the amount of light but were also changing. The depth of field doesn't change a lot with each setting, but it grows and becomes pretty significant by the time we get down to f twenty two. In this case, and so changing the aperture changes, the light and the depth of field now is like comes in the camera in order for you to see what's going on, they reflect ex portion in single lens reflex is the mirror, and the mirror is bouncing light upward to a focusing screen, and some of you may recall, or maybe even you own a camera with a focusing screen as thie primary viewing device, like a hasselblad camera, older hasselblad camera or really twin lens camera. Twin lens cameras had this that people would look at, but for convenience, it's a lot easier to bounce the light through a prism system and out the viewfinder. This way you can hold the camera right up to your eye you get to see exactly what your lens sees. You get to see whether it's in focus or out of focus whether it's wide angle or telephoto you get to see all the filter effects everything that you I have the camera pointed at you get to see as you're looking through the camera now when you take the picture that mere needs to get up and out of the way so that light can make its way back to the image sensor and the image sensor is a huge deal in cameras before we just used to buy a roll of film to upgrade our camera in some ways just get a new, better quality film and now it's the image sensor and we'll talk more about the size in this particular camera. But in front of that image sensor is a shutter it's actually a two part curtain system. They're not curtains there actually metal blades but they're called curtains the first curtain or blades will drop away so that light will come will come in and that will expose the sensor for a very specific amount of time before the second curtain or second syriza blades comes in and blocks the light off at which point the mere returns so then you can see what's going on so if you saw it in the viewfinder you missed it now, with the shutter speeds, that is another way of controlling the light, how much light we would use a very fast shutter speed to stop action. For instance, a bird in flight will freeze the wings he's fast shutter speeds don't allow in much light, but they do a very good job at stopping action. As you can see, a more regular shutter speed would be one hundred twenty fifth of a second that's a pretty pedestrian shutter speed, you might say, as we get down into slower shutter speeds like a thirtieth of a second, we might end up with blurring if a subject moves in this case, you can actually see that the camera's on a tripod the bridge is sharp, but people are blurred because they're walking and that's how much blur you can expect to get with people walking at one eighth of a second, slower shutter speeds are going to require a tripod like a half second, but you could get some very interesting results with water that moves around and a long shutter speed of thirty seconds taken at nighttime, just simply moonlit, these airwaves rolling in and around the rocks on the california coastline. As I said before, one of the big things about the camera is the sensor in the camera, and the cannon sixty uses a very large sensor in its camera. And that's one of the big deals about the camera ah lot of the other cameras on the market are using smaller size sensors and that's one of the best things about this camera's the large size sensor in it and this sensor is based exactly off of thirty five millimeter film now thirty five millimeter film was a hugely popular format for reasons we're not going to go into right now. But it's the largest of the common formats for single lens reflex cameras and it's often referred to as full frame in that it is the same size is thirty five millimeter film it has a crop factor of one point o which is a very awkward way of saying it's the same size is thirty five millimeter, which means lenses act the same as they did with thirty five millimeter film. Now other cameras will use different size sensors in their camera and canon itself will use other size sensors in their lower end cameras. And so there will be a difference when we get to the lenses and I'm going to go in and explain about how the lenses work in which lenses you want to look at but these are some of the basics of photography that I assume that everyone should know and if anything in the last five minutes I presented was new information this is where you're going to want to check out the fundamentals of digital of class, because I go through in that class and all everything you should know about photography, he might say. And so, uh, I don't know what my class is that much better than anyone else's. But one of the things that I do differently is I do a lot of graphics, as you saw in the last five minutes. And so, if you like, if your visual learner that's a great class, too, to get and that's available at creative life.