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Electronic circuit in D5 lens turret
My D5 lens turret (purchased used) has a 5 wire cable with din plug. In the square acrylic piece surrounding the lens opening, there appears to be 9 sensors of some sort. I assume this was some sort of autoexposure device. Sound right?
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Re: Electronic circuit in D5 lens turret
I can't get a real clear view of those supposed sensors, but they don't really look like such. Moreover, 5 contacts for 9 sensors would be an interesting puzzle, given the likely fairly simple circuitry that would be in integrated in such a module at the time this was engineered.
Can't this 'simply' be an electronic shutter, and the 'sensors' the pivoting points of 9 shutter blades?
Re: Electronic circuit in D5 lens turret
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Re: Electronic circuit in D5 lens turret
Quote:
Originally Posted by
koraks
I can't get a real clear view of those supposed sensors, but they don't really look like such. Moreover, 5 contacts for 9 sensors would be an interesting puzzle, given the likely fairly simple circuitry that would be in integrated in such a module at the time this was engineered.
Can't this 'simply' be an electronic shutter, and the 'sensors' the pivoting points of 9 shutter blades?
I don't think so. Looking closely at the inside edge of the circular opening, I don't see anything remotely "movable". Three layers: topmost being clear acrylic/plastic material, a thicker layer of black acrylic/plastic material (into which I believe these sensors are embedded), any finally another layer of black acrylic/plastic/phenolic material.
These photos might give a better sense than my description.
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Re: Electronic circuit in D5 lens turret
sensors... where? there are only 4 wires connected... red n green as power, the other 2 says on off most likely.
my guess, iris n shutter control or a focusing control. youd have to go in further to see where it goes.
Re: Electronic circuit in D5 lens turret
Quote:
Originally Posted by
Paul Ron
sensors... where? there are only 4 wires connected... red n green as power, the other 2 says on off most likely.
my guess, iris n shutter control or a focusing control. youd have to go in further to see where it goes.
I tried to show what I think is a sensor it the photo in my post #4. There are 5 wires connected, one wire is black so did not show well in the initial photo.
I'm still betting on some type of exposure control used is a commercial lab.
Re: Electronic circuit in D5 lens turret
yeah i see it now. can you get a picture from the other side of the board? ... the back. black can be a common of an on off on switch.
exposure control is possable but it may just be a shutter blade hooked to a timer controled by a solenoid.
Re: Electronic circuit in D5 lens turret
Quote:
Originally Posted by
HMG
I tried to show what I think is a sensor it the photo in my post #4. There are 5 wires connected, one wire is black so did not show well in the initial photo.
I'm still betting on some type of exposure control used is a commercial lab.
I see what you mean now. The supposed sensors are still hard to see, but this is logical given the fact that they're below a layer of acrylic. I agree there doesn't seem to be much space for the leaves of a leaf shutter, which would have been my guess. Quite honestly, in your place, I would have gotten busy with a spanner and some screwdrivers by now to figure out what's inside that sandwich ;)
Re: Electronic circuit in D5 lens turret
Throw it away before you get in too deep!!
OK I have no idea, maybe for switching RGB filters for additive filtration for color???
Simmons had a cool dual filter system for Varigam VC papers, Five wires is a lot of possibility.
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Re: Electronic circuit in D5 lens turret
At first I thought it might be the shutter for the Omegalight, but I did find a picture and it is certainly different. Again, making it appear you have a unique device.
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