Question about setting focal length....?

  • Thread starter Thread starter M L
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M L

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If I want to set my focal length to say 30mm....is there a way of doing it without having to take a picture first and checking its info to see that I've set it to exactly 30mm??

I mean I can round about guess by looking at the numbers on the zoom ring......but I won't know for sure (ie. it may look like I've set it to 30mm by looking at the numbers on the zoom ring, but how do I know for sure it's not, say at 28mm) unless I take a pic and look at the pics info.

Thanks, I'm using an Olympus E-3.

Oh also another question concerning the Olympus.....if someone says they're focal length is set to 60mm using a Canon or Nikon.....would this be 30mm for an Olympus?
 
Canon and Nikon make both APS-C and FF cameras.

Regardless of the camera, 60mm is 60mm, etc. however the field of view will change depending on the format.
 
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