DSLR Lenses

Discussion in 'Photography Forums' started by Pieeater, Jan 22, 2008.

  1. Pieeater

    Pieeater
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    A daft question because I ought to know such things but, do DSLR only lenses (I presume there are such things) need the focal lengths multiplying like 'regular' lenses that work on both SLR and DSLR?

    Thanks
     
  2. dfrear

    dfrear
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    I believe so, I think the digital editions simply employ a few more lense coatings and other things to produce better images, crop still affects them.
     
  3. dfrear

    dfrear
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    EDIT: Mods please delete.
     
  4. dfrear

    dfrear
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    Uh, I think something *may* have gone wrong when I posted that... server end that is.
     
  5. Pieeater

    Pieeater
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    Thanks for the clarification. That means buying a DSLR requires a new wide angle. :(
     
  6. Yandros

    Yandros
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    I'm not aware of any differences in coatings etc.

    'DX' lenses, designed for cropped sensor DSLRS (ie all except the likes of the full frame Canon 5D and Nikon D3), only project an image circle big enough to cover the smaller sensor area. If you use them on a film SLR or a 5D/D3, you'll get vignetting. Conversely, 35mm film lenses are perfectly fine on a cropped sensor.

    Having said all that, yes dfear is absolutely right. If you put ANY lens on a cropped sensor DLSR, digital(DX) or 35mmfilm/full frame, the effective focal length is multiplied by 1.5 (Nikon), 1.6 (Canon) 2(Olympus) etc
     

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