Re: Calculator Lens Revisited
- From: "Jim Bliss" <jim@xxxxxxxxxx>
- To: <optacon-l@xxxxxxxxxxxxx>
- Date: Tue, 18 Jul 2006 08:12:00 -0700
As I recall it was a matter of timing. The calculator lens was designed
later and had other changes as well, e.g., the filter for reflected light
from ink was left out.
Jim
----- Original Message -----
From: "eggmann" <eggmann@xxxxxxx>
To: <optacon-l@xxxxxxxxxxxxx>
Sent: Tuesday, July 18, 2006 5:30 AM
Subject: Re: Calculator Lens Revisited
> Jim, this begs the question as to why a small disabling switch was not
> installed in the camera moduals of both the regular and magnification
> lens,
> thus negating the expense of the calculator lens.
>
> Doug: that water under the bridge--maybe it had fish in it!
>
> The part you move across the type is called the camera unit. It comes in
> two parts, a retina module and a lens unit. The two units can be snapped
> apart by push in and twisting. On the part of the retina module that was
> inside of the lens module are two contacts that mate with corresponding
> contacts inside of the lens module. These contacts conduct power to the
> lamps in the lens module. You need to break this circuit to turn off the
> lamps. You can do this by placing a small thin non conductor, such as a
> small piece of tape, on one of the contacts and re-assembling the retina
> module and lens unit.
>
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