Nikon dx lens question

Discussion in 'Digital Discussion & Q&A' started by domromer, Nov 25, 2007.

  1. domromer

    domromer TPF Noob!

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    I have the dx 18-135 that came with the D80 kit. Since it's a lens made for digital camera does that mean the focal length is 18-135 and I don't have to do the multiply by 1.5 thing to figure what focal length I'm actually at?
     
  2. Patrice

    Patrice No longer a newbie, moving up!

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    No, the apparent focal lenght is still affected by the "crop factor". DX lenses project a smaller image circle.
     
  3. domromer

    domromer TPF Noob!

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    Do you know what the number number to multiply by would be to get the correct focal length?
     
  4. Steph

    Steph No longer a newbie, moving up!

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    The crop factor is determined by the size of the sensor relative to the size of a 24x36m (full frame) and is therefore the same for ALL lenses. I think the crop factor is about 1.5-1.6 for the D80.
     
  5. Rhubarb

    Rhubarb TPF Noob!

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    Yep, the D80 has a crop factor of 1.5.
     
  6. Bevel Heaven

    Bevel Heaven TPF Noob!

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    those thick little booklets that come with the camera and the lens are your friend........ ;)
     

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