My Lumen project http://ginetteclement.com
The single lens board from the Durst 184 fits the Durst 138 condenser head. What does not work with the TRIPLA is a recessed lens cup often required for shorter focal length lenses. Minimum bellow on the 138 limits the shortest lens focal length to about 100mm. This needs to be considered when using the 138 with smaller film formats like 35mm, solution is use a specific recessed Durst lens board giving up the rotating turret feature when projecting small film formats like 35mm.
The three lenses that were used on the Durst TRIPLA back in the day:
105mm EL Nikkor on recessed Durst cup _ 35mm, removed or install as needed.
135mm EL Nikkor _ 6x6 to 6x9
180mm APO Nikkor _ 4x5
9-1/2" APO Artar _ 5x7 & 13x18cm
Matching condenser sets required.
Bernice
It's a reasonably recent one since it has the removable turret. I'd guess 1980's vintage. The early ones had a fixed turret and a different bellows. I'd get a Unipla lens board and ditch the turret. Always hated turrets.
I've printed 35 mm with an 80 mm lens and the Laratub-N lensboard. Never saw a need for a 50 mm lens since I don't print huge. All said, it's a great enlarger. L
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