DSLR basics: lens topics

Discussion in 'Photography' started by KCook, Jun 8, 2011.

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  1. KCook

    KCook Well-Known Member

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  2. Andy Stanton

    Andy Stanton Super Moderator Super Moderator

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    Very helpful, Thanks.
     
  3. KCook

    KCook Well-Known Member

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    You're welcome. I had my fingers crossed on the new Sigma 10-20. But it worked flawlessly, couldn't tell any difference in use from a Canon lens.

    Kelly
     
  4. KCook

    KCook Well-Known Member

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    Back in my 35mm film days I was shooting with an Olympus. Still have a few of the old manual focus OM lenses, now almost a half century old!

    As an experiment I got a simple (very cheap) OM-to-EOS adapter to see how an old lens would work on my new Canon 50D. Short answer is, very well! Of course there is no hope for auto focus. Instead have to switch to the live view mode, which has a magnifier feature for manual focus. It certainly slows things down to have to fuss with the magnifier view, but it does work, perfect results. This MF mode also rules out all of the camera's Auto and Scene modes. Works only in the PASM modes. I don't know if that restriction applies to other brands. What really impressed me is that the auto exposure still works perfectly in Program mode. Took two shots back to back. One with a fully auto EOS lens and one with the ubber simple Olympus lens. Both gave exactly the same image intensity. Even though the Program mode did make an auto shutter adjustment for the Olympus lens. Very cool!!!

    Upshot is that this gives me a very inexpensive macro setup for my new camera. No need to buy a current auto macro lens (which aren't cheap).

    Kelly
     
  5. KCook

    KCook Well-Known Member

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    Thanks. But with hindsight I wish I had a couple of people posing in the shots. To give a better sense of what "normal" means to the 35mm frame, as well as others. Distortion control for the 10-20 lens is good enough that it's shots don't come across as wide angle as they really are. 10mm is crazy wide!

    Kelly
     
  6. KCook

    KCook Well-Known Member

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  7. luke chapman

    luke chapman New Member

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    Love that photo great perspective
     
  8. KCook

    KCook Well-Known Member

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    My blue shoes luv it too :D
     
  9. KCook

    KCook Well-Known Member

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  10. michael007

    michael007 New Member

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    Very useful information about Lens! Thanks for sharing.
     
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