The speed of the shake - just a quicky

Discussion in 'Photography Beginners' Forum' started by hyakuhei, Jul 5, 2007.

  1. hyakuhei

    hyakuhei TPF Noob!

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    Hey all, I've been wondering about camera shake -

    The recommendation is that you should not go slower than 1/focal length, soo for a 300mm lens I shouldn't dream of shooting at anything slower than 1/300th.

    My questions is what happens with crop-factor cameras ? my dSLR has a crop factor of 1.6x making my 300mm lens the equivalent of about 480mm. Does this mean that I should stay above
    1/300
    or
    1/500

    I know I could work this out by trial and error (if I had my lens with me - its
    860 miles away atm) but I thought other people might be wondering the same thing so I've posted it here.

    Thanks
    -Rob
     
  2. Garbz

    Garbz No longer a newbie, moving up!

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    Think about it. By cropping in "zooming" 1.6x into the 300mm image and blowing it up on your sensor you are effectively amplifying any defects in the image. Thus shake that could be considered acceptable for a full frame sensor is blown up on a APS sensor as your effective focal length as far as the picture concerned is increased.

    Mind you this is a rule of thumb only. If you brace yourself you can probably go slower. If you have parkinsons maybe go a bit faster.
     
  3. hyakuhei

    hyakuhei TPF Noob!

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    As I had suspected ;-)

    Thanks
     
  4. Augphoto

    Augphoto TPF Noob!

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    Although, I don't advocate hand holding when you don't have to, I believe the rules have changed dramatically since the introduction of anti-shake technology. Your limits today are partially determined by the equipment you are using.
     

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