One is a mirror, the one at the top is the focus screen. The image is
reflected by the mirror onto the surface of the screen. That is what
you see when you look through the eyepiece. The sensor in a digital
camera is placed where the film would otherwise be.
B is a shutter speed, found in the manual mode of the camera. It stands
for "Bulb". Shutter stays open as long as the release is held down.
This was used by photographers many (MANY) years ago for either allowing
the long exposure needed by low speed film or glass plates or
synchronizing the exposing of the film (glass plates) to flash powder or
whatever was used in those times.
___________________________________
John Hermanson
Camtech Photo Services, Inc.
21 South Lane, Huntington NY 11743
631-424-2121 | Olympus OM Service since 1977
http://www.zuiko.com | omtech1 AT verizon dot net
Scott Peden wrote:
> Wow, I didn't even recognize the parts you were talking about. Obviously I
> don't know the parts names.
>
> I have an E-500 and I keep hearing about bulbs, but I think all I have is an
> electronic timer and a remote.
>
> When you take the lens off, there is a small mirror, when I looked up from
> there, there is another reflective surface and that is what has all the
> hairs and lint on it, and how it got there beats me.
>
> The vibration thingy apparently isn't powerful enough to clean the crap off
> of it.
>
>
> -----Original Message-----
> From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
> Of Winsor Crosby
> Sent: Thursday, February 22, 2007 11:38 AM
> To: olympus@xxxxxxxxxx
> Subject: [OM] Re: cleaning sensors
>
>
> I don't know of a camera where you can see two mirrors from the lens
> opening.
>
> The sensor is behind the mirror and behind the shutter curtain in a
> DSLR. Generally you access it from the bulb setting for the shutter
> with a fully charged battery and a locking shutter cable, or from a
> special cleaning setting on the menu with a plug in power supply.
> Each option flips the mirror out of the way and opens the shutter so
> you can get to the sensor.
>
>
>
> Winsor
> Long Beach, California, USA
>
>
>
>
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