I think this is correct.
But if you try to manually focus an AF lens without switching the camera to MF also
this can strain the AF mechanism - but you will notice it yourself because the MF ring
is hard to turn.
All the best!
Raimo
photos at http://personal.inet.fi/private/raimo.korhonen
-----Alkuper�inen viesti-----
L�hett�j�: K.Takeshita <[EMAIL PROTECTED]>
Vastaanottaja: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
P�iv�: 02. tammikuuta 2001 20:40
Aihe: Re: Newbie question: Using a Manual Lens
>on 1/2/01 10:56 AM, Delano Mireles at [EMAIL PROTECTED] wrote:
>
>> Hi all,
>>
>> this is probably a stupid question but here goes:
>>
>> I just received my first non-AF lens and I want to make sure I use it
>> correctly. I guess my basic questions is whether I need to switch my camera
>> to the MF setting BEFORE attaching the lens to the camera? I know that I
>> can cause damage by to the camera or lens by not switching on an AF lens if
>> I try to focus manually but not sure of the danger on a MF lens. Please
>> excuse the 'newbieness' but just want to keep my camera out of the repair
>> shop.
>
>Hi Delano,
>
>This response is from another "newbie" ;-) So more authoritative answer
>might come from gurus.
>
>I do not think you will damage anything when you are just attaching an MF
>lens to an AF camera. AF cameras have a spring loaded drive shaft, about
>the size of a lens mounted electrical contact, which will engage with the
>counterpart of an AF lens. It is spring loaded because whenever you attach
>"any" lens (AF or MF), lens mount surface will have to "run over" the shaft,
>pushing it down flush with the mounting surface. In the case of AF lenses,
>when it is properly mounted in position, the drive shaft from the camera
>body will engage with the counterpart in the lens mount.
>In the case of MF lenses, there is no matching engagement, so that the drive
>shaft from the camera body stays pushed down and does no harm.
>
>I do not think the shaft will rotate with an MF lens mounted as the auto
>focus won't function anyway (I do not know if the drive shaft is disengaged
>when it is pushed down. Probably is).
>
>However, when the camera body is set to MF position, it retracts the drive
>shaft slightly below the mount surface (probably disengaging from the drive
>motor as well). So, if it makes you comfortable, you can set the camera
>body to MF setting so that the mount surface of any lens, MF or AF, won't
>even touch the drive shaft.
>
>Hope above is correct.
>
>Cheers,
>
>Ken
>
>
>
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>
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