The sound of pennies dropping

I shoot a Canon EOS 7D. As well as some Canon lenses, I also own some Sigma lenses. I acquired an ƒ/2.8 70–200mm Sigma a little while ago.

Now, something about using Sigma lenses on Canon bodies bugs me. See if you can spot it in this screenshot from Aperture (bear in mind the image was shot using the 70–200mm):

Screen_shot_2012-03-30_at_15

See the lens model at the bottom? It seems the Canon “brain” sees the Sigma lens, but identifies it as an ƒ/2.8 50–150mm plus a 1.4x extender! Do the maths, and you’ll see this odd combination actually works out as a 70–210mm. It’s not just this lens, either. All my Sigma lenses, both EF and EF-S compatible, are reported incorrectly in the EXIF from the camera. Weird but true.

It would be really nice if there was a way to correct this, either in the camera or within Aperture. I haven’t found a way yet.

4 thoughts on “The sound of pennies dropping

  1. Joe, no. Only the lens model is affected. To be honest, I can live with the oddity. It is just nice to know if it can be fixed.Paul, thanks for that. If I recall, I’d have to export the masters to run them through the script, and then reimport them. I have a simple workflow right now: import from card, rate, basic processing if needed, export somewhere. I do rather dislike having to step back and forth like that, but then that’s the way I am!

  2. Oh, Lordy. Somewhere I blogged about changing/adding EXIF data for my Trip last year. It needs AppleScript. Can I find where I posted it now? I think it’s on x404 – must look for it.

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