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Old Jan 7, 2011, 7:52 PM   #1
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Default buy 35mm afs and a 50mm afs prime or.....

i looking into getting into some more portrait stuff should i buy 2 prime lenses the 35mm afs and the 50mm afs or should i just buy the 28-70mm afs f2.8
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Old Jan 7, 2011, 8:46 PM   #2
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50mm is a little short for head-and-shoulders portraits, so I thing you'd be better off with the 28-70/2.8 zoom.
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Old Jan 7, 2011, 9:04 PM   #3
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and is the sigma 24-70 2.8 a good lens
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Old Jan 7, 2011, 10:20 PM   #4
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Correct me if I'm wrong but I am certain that primes are all manual focus.
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Old Jan 7, 2011, 10:25 PM   #5
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I've read the afs versions have auto focus
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Old Jan 7, 2011, 10:29 PM   #6
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Quote:
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I've read the afs versions have auto focus
Fair enough but at f1.8 I'd never want afs haha.
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Old Jan 8, 2011, 5:23 AM   #7
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Yes, the "AF" is for "Auto Focus". The "S" is the lens' built-in silent AF motor.
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Old Jan 8, 2011, 11:43 AM   #8
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Quote:
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Correct me if I'm wrong but I am certain that primes are all manual focus.
The 'primes' are only manual focus on selected bodies (mainly entry level), in semi-pro and higher Bodies they are all autofocus, since the respective body will provide the AF.
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Old Jan 8, 2011, 11:52 AM   #9
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ok how about the Sigma 24-70mm f/2.8 IF EX DG HSM AF does this have the built in motor and how good is this lens
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Old Jan 8, 2011, 1:06 PM   #10
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Quote:
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The 'primes' are only manual focus on selected bodies (mainly entry level), in semi-pro and higher Bodies they are all autofocus, since the respective body will provide the AF.
No, it depends on the lens. For many prime lenses, they will autofocus on both the low end and high end Nikon cameras. AF-S lenses from Nikon are examples of this. For many prime lenses, whether they will autofocus with a given camera depends on whether the camera has a focus motor in its body, as you say. AF lenses are examples of this. For many prime lenses, they are manual-focus only. AFAIK, all Zeiss primes are like this. When you consider very old lenses, AF-I and before for example, the situation is really confusing. So the reality is considerably more complicated than you indicate.
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