Jon Shiu
Subscriber
Powerful grain focuser. Adjust the eyepiece so that the etched circle is in focus with your eye in place. Then it's calibrated for your eyesight.
This one is a little rough looking but works fine. I checked it against another grain focuser in the darkroom.
$25 plus postage.
This one is a little rough looking but works fine. I checked it against another grain focuser in the darkroom.
$25 plus postage.