The Versalab Parallel Enlarger Alignment Gauge is fast and easy. Imagine, right in the middle of a printing session in the darkroom you become suspicious that your enlarger is not aligned. Just set the PARALLEL on the easel and turn it on, hold the reflector against the face of the lens (or remove the lens and substitute the reflector for the negative in the negative carrier) and the alignment is instantly verified! No squinting, no fiddling, no fussing!! The PARALLEL itself does not need to be carefully aligned or installed, simply placed close to the middle of the easel then moved around until the red laser dot reflects back onto the target. Your hands are now free to work on the equipment.
The PARALLEL is very accurate. The dot reflection system of the PARALLEL magnifies any misalignment. The output beam of the PARALLEL is factory aligned to within .015” over 20”. If a 35mm. negative stage is out of alignment by as little as the thickness of the film, the dot will miss the target aperture by over .04” (1mm.).
The PARALLEL consists of a small phenolic box roughly 3” x 4” x 1.5” with a metal lid and a switch on one end. The bulk of the inside of the box is filled with the rigid solid aluminum laser mount. Also in the box is a holder for the two AA batteries that power the laser (one set included).