Cyron at Jo Jo's

Shot with Johnno's 5D and my Sigma 10-20mm lens. It's a DC (EF-S) lens and not meant for full frame cameras, thus the heavy vignetting. Interestingly, not as bad as 10mm on a film SLR.

View all photos taken: Friday, 7th September 2007, This photo: 5:34pm

Previous Photo: Willie Wagtail


  • ronnietan said:
    interesting effect, ive never seen an example of this
  • Xenedis said:
    We were at Jo Jo's in the Queen Street Mall. I'd gone inside the door behind Cyron) to order my meal and a delicious sauvignon blanc, and these two clowns decided to play with the toys. :-)
  • FrAcTuReD...fOtOs said:
    Hey,my daughter works there David. Good food.
  • David de Groot said:
    Indeed. At 20mm it's almost usable on a full frame body (still vignettes but it's mostly useful).

    Well yes, there was all this expensive kit lying around what else are we going to do ;-)

    We've had two meets there now Jeff. Not bad at all, and reasonable prices given the location.
  • The Sage of Shadowdale said:
    Yeah, if someone left photographic gear unattended in front of me I'd probably get stuck into it too. Serves Johnno right for having to much money. ;-)
    Discovered using FlickrFox. (?)
  • David de Groot said:
    Indeed - not that I'm complaining, it's great being able to road-test lenses (well apart from the fact they're all lenses I can't currently afford - soon... soon, he says hopefully)
  • .steve.t said:
    Wow, impressed! Dave, I thought that if you mounted an EF-S onto a 5D that the shutter box would get damaged?
  • David de Groot said:
    That is true of Canon lenses. Canon specifically add a section onto the back of EF-S lenses that make them protrude further, however, Sigma DC lenses are a proper EF mount, they just have a smaller image circle. I was confident of trying this as I'd already attempted it on my EOS 50 which has an even larger mirror than the 5D.
  • Andreas Helke said:
    I am using the Canon EF-S 10-22 with my 5D. At 10mm the vignetting looks similar to the Sigma shown above. But I only use the lens starting at 15mm where the image circle is big enough for full frame and no risk of the mirror hitting anything. Its unlikely that the equipment gets damaged if the mirror hits the lens but I don't want to test this myself.
    I just needed 2 seconds to convert my lens for EF mount by just pulling the back part of the lens out with my finger. If I put it back in I get back my original EF-S lens.

    Canon EOS 5D-EF-S10-22mm f-3.5-4.5 USM-15 mm-1-50 Sek. bei ƒ - 8,0-ISO 400
    The vignetting has been corrected with lightroom
  • Goldenboi24k said:
    How did you get a EF-S lens onto a full frame ??
    I thought it was physically impossible.
  • David de Groot said:
    The Sigma 10-20 is an EF mount, not an EF-S mount.
    However, you can get certain EF-S lenses onto full frame cameras by removing the plastic baffle from the rear element and making sure you never zoom out far enough to push the rear element into the mirror.
  • Xenedis said:
    I don't recommend trying that, and I've certainly not done so.
  • The Sage of Shadowdale said:
    Come on Johnno! Live a little. ;-)
  • Xenedis said:
    Mike: Buy a 5D and loan it to me, and I'll be happy to experiment. |-)
  • benjacobsen said:
    day late and a dollar short, I know, but I'd bet the shot on film had the hood on and this one didn't. I've also heard that both this lens and the 10-22 can be used with certain 1.4 TCs and cover FF at 10mm giving you 14mm effective FL?
  • David de Groot said:
    [] Hood was on for both. J & I both use our lens hoods all the time.
    As for the TC, it might be possible, but not with a Canon 1.4x TC due to the protruding front element.
  • benjacobsen said:
    weird, I've done this exact test with the 11-16 on FF and the hood shot gives you the weird box, the non hood shot gives you the circles like this.
    this is w/o the hood:
    this is with the hood:
    as for the TCs, you're right, you need to use the kenko TC as it's lens side elements are recessed and work. Tamron's TC might work too.