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[OM] Re: Sigma lens

Subject: [OM] Re: Sigma lens
From: Larry <halpert@xxxxxxxxxxxxx>
Date: Fri, 09 Nov 2007 05:44:10 -0500
Forgot to mention, of course in-camera shake-reduction (or IS) works 
with this lens as well (as all old lenses work with brands of cameras 
that have shake reduction like Olympus for example.).

Larry


Larry wrote:
> Chuck Norcutt wrote:
>   
>> Notice the brass/gold contacts around the lens flange. 
>> These are electrical contacts for an autofocus lens which also has an 
>> electrically controlled diaphragm. That why, when you adapt OM or other 
>> lenses to your E510 you 
>> won't have any automation.  No automatic aperture control and no auto 
>> focus.
>>     
> These contacts are to tell the Pentax camera the focal length, and 
> aperture information, any MTF information put on the chip, etc. No 
> in-lens motor (Its an old lens). The circle with slot next to the bottom 
> screw connects the focus motor. Full metering, auto-diaphragm, all auto 
> & program modes including MTF, and auto focus in all Pentax bodies 
> including the ones made right now. (K10D, etc.)
>
> Larry
>   
>>   
>>     
>
>
>
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