DLUX-4 shutter

[jllbms]

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Anyone know what type of shutter the DLUX-4 has? I assume it's a "virtual" shutter.

 

?

 

thx,

John

[ho_co]

John--

Interesting question.

 

Since if you look into the lens you can see it move when you fire it, I doubt that it's 'virtual.'

 

I would guess it's a mechanical shutter combined with diaphragm. There's a name for that, but I've forgotten it.

 

A single unit that serves both as shutter and diaphragm is often used when dimensions are small and tight, as here. And I think there's a table in the instructions showing which shutter speeds can be combined with which apertures. That also makes me think the shutter and aperture may be one.

 

So that's my guesswork toward a good question.

[sdommin]

The tech specs section in the back of the manual says the shutter system is "electronic and mechanical".

[ho_co]

From an earlier thread on a different camera, but probably negating most or all of what I said above. (The original URL is no longer active):

 

Posted by Mark Norton:

Interline sensors have a built in shutter function where the electronics strobes the chip for a period set by the selected or AE calculated shutter speed. The process is exactly analagous to exposing film. The resulting signal level from each pixel depends on the light level and exposure time.

 

The reason why the D2 has any mechanical shutter is to cover the sensor up, not to expose it. While the captured image is being read out, the live preview has to be suspended and the sensor covered. The D2 shutter is a simple flap and when you hear it go click (not the shutter sound effect), the image has already been captured.

 

So, John, I think we're back to the "virtual shutter" idea.