:-)
Chuck Norcutt
On 6/21/2011 2:47 PM, Piers Hemy wrote:
> Oh *that* one (he said, pretending that he hadn't forgotten all about it).
>
> Piers
>
> -----Original Message-----
> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> Sent: 21 June 2011 18:00
> To: Olympus Camera Discussion
> Subject: Re: [OM] m43 adapter
>
> The DOF preview button on the OM lens.
>
> Chuck Norcutt
>
>
> On 6/21/2011 12:55 PM, Piers Hemy wrote:
>> All agreed until your final sentence, Chuck. What DoF preview button
>> do you have in mind? Is there such a button on any m43 adapter?
>>
>> Piers
>>
>> -----Original Message-----
>> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
>> Sent: 21 June 2011 17:48
>> To: Olympus Camera Discussion
>> Subject: Re: [OM] m43 adapter
>>
>> Not quite correct. OM lenses are normally wide open independent of
>> the aperture ring. The lens is closed to the pre-set position at the
>> time of exposure by the stop-down arm of an OM camera body. When you
>> have an OM lens on an adapter something has to take the place of the
>> OM body's stop-down arm. If you inspect the lens side of your adapter
>> carefully you will see some sort of pin sticking out from the inside
>> rim. The purpose of that pin is to catch the stop-down arm on the
>> lens and force the diaphragm closed when you move the aperture ring.
>>
>> Remove that pin and the lens will stay open all the time... just as it
>> is when it's not mounted on a body. Some people prefer to remove the
>> pin and force the lens closed at the time of exposure by pressing on
>> the DOF preview button.
>>
>> Chuck Norcutt
>>
>>
>> On 6/21/2011 12:28 PM, George Themelis wrote:
>>> The adapter that I have is a spacer with the correct ends for the
>>> connections. The aperture is controlled by the lens and stays where
>>> you put it. So you if you want to open it to focus and then close it
>>> to shoot, you just turn the aperture ring of the lens. Nothing to do
>>> with
>> the adapter.
>>>
>>> George
>>>
>> --
>> _________________________________________________________________
>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
>> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
>> Themed Olympus Photo Exhibition: http://www.tope.nl/
>>
> --
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|