Homebrew PCBs

There is one point about working distance that isn't immediately
obvious, wasn't to me anyway.
The working distance added to the length of the optics is the eye
height above the work.

The worst combination is short working distance, short optics with
severely angled eyepieces, and a low base.
This forces the user to crouch his head down while looking forward at
an angle, very uncomfortable in the neck if you are tall.
Many of the cheap imported stereo scopes are exactly like that.

I haven't actually ever had a clearance problem with short working
distance, but ergonomics is another issue.

ST


On Thu, Sep 27, 2012 at 8:58 PM, AlienRelics <alienrelics@...> wrote:
> They also sell an adapter that halves the power, while giving you twice the working distance and of course twice the field of view. I just ordered the adapter, 8 inches of working distance.
>
> You can also order them via Amazon.com if you have an Amazon card or other credit card. I think Amscope's store only takes Paypal.
>
> Steve Greenfield AE7HD
>