What is this red dot on the 50mm f1.4?

Discussion in 'Photography Beginners' Forum' started by vd853, Apr 8, 2010.

  1. vd853

    vd853 TPF Noob!

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    I have the 50mm f1.4 USM. What is this red dot on it? the dot is between the f22 indicator. I am thinking it means f1.4?

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  2. white

    white TPF Noob!

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    Looks like the infrared focusing indicator. That vertical line is the "normal" focusing indicator; since infrared is beyond what we can see, that dot is there so you can adjust your focus.
     

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