BetterPhoto Q&A
Category: New Answers

Photography Question 

Harold W. White
 

Lens difference


Hello! I just bought a Nikkor 300 mm F/4.5 Telephoto ED Glass lens. Then I saw the Same lens but it was marked IF ED what are the differences between the two? What does IF mean? Thankyou.


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October 29, 2002

 

Jon Close
  The "IF" designation is for "Internal Focus." Focus is achieved by moving an interior element/group rather than the front element/group.


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October 30, 2002

 
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