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10-31-2008, 06:26 AM   #16
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OGL,

Do they mention how they were able to make the SDM work in the film camera?!

11-01-2008, 07:15 AM   #17
ogl
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SDM in film camera? I don't understand you.
DA*60-250 has screw-driver and SDM.
11-01-2008, 03:03 PM   #18
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QuoteOriginally posted by Gooshin Quote
the problem here is the short focus throw is a double edged sword. MF'ing this will be a bitch.

much like my Sigma 28mm F1.8, the focus throw is very short, and the lens is a pain to MF.

which means you HAVE to rely on autofocus, which kind of sux.

they should have simply installed limiters, like the canon tele-zoom lenses.
Focusing rings don't spin in AF mode on DA* lenses, so I really don't see why AF would be faster if their travel is shorter.

Oh, and I like the 220 throw on DA* 200 and 300.
11-01-2008, 03:31 PM   #19
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QuoteOriginally posted by Matjazz Quote
Focusing rings don't spin in AF mode on DA* lenses, so I really don't see why AF would be faster if their travel is shorter.

Oh, and I like the 220 throw on DA* 200 and 300.

okay here is an example, my Sigma 28mm f1.8 and my Super takuma 28mm F3.5

on my sigma, the throw between 0.3 and 1.0 meters is about 20*, at most

on the super tak, the throw between 0.4 and 1.0 meters is about 45*

now, ofcourse, assuming focus lock is instantenous none of this matters, but as we all know its not

by the time the sigma hits the 1 meter mark, and goes back for a second go to see if it can catch, the super tak would still be spinning.

the sigma gets 4 attempts to catch focus while the super tak completes its full cycle.


atleast, thats how i understand that AF works.

my friends canon 70-200 USM L has a button it, 1.5m to infinity, and 3.0 m to infinity.

if you look at the distance scale, you will see that 3.0m to infinity is nearly half the throw of the entire scale, its there so that if you know you're not going to be shooting anything that close, you eliminate half the guess work for the camera.

11-01-2008, 04:11 PM   #20
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I tested this lens at the Photokina on my K10. A really fast and sharp lens !

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