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#1
March 14th 07, 08:09 AM
posted to rec.photo.digital
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Focal length for APS sensors
What about the focal length data for the nower compact lenses for digital
cameras with APS-C sensors? Can I skip the 1.5 x multiplying for those? -- Lars Forslin "Doing time on earth" ************************** 
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#2
March 14th 07, 08:45 AM
posted to rec.photo.digital
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Focal length for APS sensors
Lars Forslin wrote:
What about the focal length data for the nower compact lenses for digital cameras with APS-C sensors? Can I skip the 1.5 x multiplying for those? No. AFAIK only Olympus with 4/3 system lenses state "35mm equivalent" as a headline focal length when selling their lenses.
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#3
March 14th 07, 03:23 PM
posted to rec.photo.digital
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Focal length for APS sensors
Lars Forslin wrote:
What about the focal length data for the nower compact lenses for digital cameras with APS-C sensors? Can I skip the 1.5 x multiplying for those? The "crop factor", "focal length multiplier", or whatever term you prefer, applies always to the *real* focal length of the lens. All the Nikon and Canon (and third-party lenses for those brands) that I've seen state the *real* lens focal length, even on Nikon's DX and Canon's EF-S lenses that only cover the smaller sensor, so the conversion factor is needed to get the "35mm-equivalent" focal length (which is only meaningful for getting the angle of view; for every other purpose you need the *real* focal length).
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#4
March 15th 07, 12:45 AM
posted to rec.photo.digital
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Focal length for APS sensors
Thanks, I came to understand that after a while. Maybe Olympus does it
differently. /Lars "David Dyer-Bennet" skrev i meddelandet t... Lars Forslin wrote: What about the focal length data for the nower compact lenses for digital cameras with APS-C sensors? Can I skip the 1.5 x multiplying for those? The "crop factor", "focal length multiplier", or whatever term you prefer, applies always to the *real* focal length of the lens. All the Nikon and Canon (and third-party lenses for those brands) that I've seen state the *real* lens focal length, even on Nikon's DX and Canon's EF-S lenses that only cover the smaller sensor, so the conversion factor is needed to get the "35mm-equivalent" focal length (which is only meaningful for getting the angle of view; for every other purpose you need the *real* focal length).
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