Viewfinder Dioptre Adjustment Control

Most SLR cameras are equipped with a +/— viewfinder dioptre adjustment control to accommodate individual differences in vision. It's a feature that is often missed! I knew of one photographer who was so frustrated with everything appearing blurry and out of focus within the viewfinder they had corrective lenses inserted into their dive mask just to be able to clearly read the shooting information display.

When you begin to adjust the dioptre control with a lens fitted to the camera, it's very easy for your eye to automatically check to see if the image is in sharp focus. This way of setting your dioptre can be a little confusing by virtue of the lens being primarily concerned with controlling focus. If you have any doubts about this control then the best way to set up your SLR dioptre is as follows:

• Place a lens cap over the lens to block light and concentrate on the viewfinder display.

• Depress the shutter release button halfway.

• Adjust the dioptre control until these markings are as sharp as possible.

• Keep a note of the position of the setting should you accidentally move the dioptre control.

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