...What typically happens with heavy use and/or lack of proper lubrication is that the rail becomes worn in one area, which results in the focusing becoming loose in that area...If you add tension to the focus mechanism to compensate for the wear, focusing becomes excessively stiff in the other areas...

... When making big enlargements, accurate focusing can be difficult when you cant reach the focus knob while keeping your head near the surface of the easel to check focus...For owners of LPL and Jobo/LPL 4x5 and 7700 enlargers, and Saunders/LPL and Omega/LPL 4x5 and 670XL enlargers, this Flexible Focus Extension can make focusing much easier...

...The majority of enlarger focusing aids require that they be placed directly under the enlarging lens because the small mirrors cause the image to vignette as soon as you begin to move it away fro...

...onnections White Light Focusing Lamp Replacement Black And White Printing Polycontrast Paper Auxiliary Filtration Accessories ...