SLR camera lens play what role, the fuselage play what role?
From the responsibility of the fuselage and the lens, it is generally believed that the lens on the image quality of the role of a larger, about 65%. So buy the machine when the price ratio is so divided.
And the use of SLR camera from the subject when the light from the lens focus, was oblique reflection mirror reflected to the focus screen imaging, and then through the top of the ridge to the "roof prism" reflection, the photographer through the viewfinder eyepiece can see the scene , And is up and down around the same scene with the image, so framing, focusing are very convenient.
SLR, that is, single-lens reflex. With this technique, the camera has only one shot, and the lens is used both as a photographer and as a photographer. This will be able to fundamentally solve the parallax caused by the decline in the quality of the situation.