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Pentax SLR Lens Discussion Discuss any Pentax K-mount, screwmount, or medium format SLR lens, as well as filters and attachments.

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03-12-2009, 08:54 AM   #1
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Playlist with videos of DA* lenses hunting

One of the forum members complained about 55's AF speed. So I collected several videos of different youtubers letting their DA* lenses hunt. However, it's definitely not the best test of AF speed and it's not even the best comparison of lenses hunting, because each one may be on a different body and/or a body with batteries with different charges. 16-50 seems fastest, 50-135 seems slowest, while 300 isn't on the list yet.

Nevertheless, enjoy videos of pretty lenses:

Videos of Lenses Hunting
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03-12-2009, 09:30 AM   #2
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Interesting - but I isn't there a difference in kind between lock-to-lock focus travel speed and getting the lens and AF system to actually lock onto a specific object?
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03-12-2009, 10:16 AM   #3
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Originally Posted by Sean Nelson View Post
Interesting - but I isn't there a difference in kind between lock-to-lock focus travel speed and getting the lens and AF system to actually lock onto a specific object?
That would be my guess, as well. There are other videos on youtube with people focusing on objects near and far, which seems like a better test. However, I couldn't find videos of that sort involving DA* lenses.

EDIT: Here's a couple (I haven't made any of these):

http://www.youtube.com/watch?v=j25VPu9-i3s
http://www.youtube.com/watch?v=IhN8oXKYqUM
http://www.youtube.com/watch?v=2wHFb0bbLyc

Last edited by asdf; 03-12-2009 at 10:24 AM.
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