The diopter adjustment control is a knob on the camera that allows the user to adjust the focus of the viewfinder and/or LCD displays to match the individual's vision. This is particularly helpful when shooting in low-light conditions, where the photographer needs to be able to see the details in the frame in order to compose the shot correctly.
Ok, I own a Rebel t3i. Everytime I look in the viewfinder, it's blurry. However the picture comes out crisp. It isn't the diopter adjusment. Sometimes when I hold the camera up and wiggle it, the viewfinder will be clear for a couple seconds, then it'll go back to being blurry. There aren't any came The diopter will also allow compensation for minute differences in the positioning of the reflective components that make up the VF. It is similar with binoculars and telescopes. Most good binoculars have a diopter on one of the eye pieces. You adjust the binoculars so the image is sharp for the eye without any adjustment then adjust the Are your images blur even though the auto focus i working fine. Do you wear specs? Watch this video Approx. 0.8x (-1 diopter with 50mm lens at infinity) Eyepoint : Approx. 20 mm: Built-in dioptric adjustment-3.0 – +1.0 diopter : Focusing screen : Fixed, precision matte: Mirror : Quick-return half mirror (Transmission: reflection ratio of 40:60, no mirror cut-off with EF600mm f/4L IS USM or shorter lenses) Viewfinder information
My only pick with my brand new D70 is that the diopter adjustment doesn't quite reach my correction. Is there a stronger viewfinder lens that would allow the diopter to work for people with stronger need for correction and also correct back to 20/20 (for when wearing glasses, others using the camera, etc.)? Yes, there is.
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diopter adjustment on canon camera