Reflex camera (Single Len Reflex) SLR, It is very easy to assemble images are also included. Shared many Cameras with interchangeable lenses, and I do not deviate from the trimming (Parallax) because using a single lens act as a viewfinder for the duration and recording, however, the camera of this type have the drawback is probably damaged. it's easy to tilt up to 45 degrees, another glass when the shutter is very noisy cause interference. Especially if to take pictures of animals. Avro virtuous cause panic Also, when I was in the other. Light may cause the image to the viewfinder is not clear. I have reflected many times mirror and prism within the camera. The intensity of light is reduced. Single lens reflex camera shutter curtain, making the most uses of shutter speeds are very high. Changing the size of the aperture is more film-type cameras with numbers 135, 126, 120, 220 and 110, which serve the needs of many users