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Pentax K20D + Sigma 17-70/2.8-4.5 autofocus speed

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Uploaded by on Mar 7, 2009

Pentax K20D + Sigma 17-70mm F2.8-4.5 DC MACRO autofocus speed

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Howto & Style

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Uploader Comments (xmeda)

  • Does the lens stay at f/2.8 maximum aperture throughout the entire zoom range?

  • @flyguyga321

    obviously not if it has 17-70/2.8-4.5

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All Comments (7)

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  • @rastislavstanik

    haha Dogs - Yes, other animals - Idont know ?? Do they ?

  • @klechetor

    dont the animals hear the ultrasound?

  • @rumvodkaf1

    HSM = quietly = silence is very important in nature photography.

  • Sounds cool. Who the hell cares about HSM or USM when all the motor does is rotate the lens a few mm to the right or to the left.

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