Durst's premium enlarging lens — the Optar 50mm f/2.8 for quality 35mm printing.
The Durst Optar 50mm f/2.8 is an enlarging lens from Durst, branded as the Optar — a designation also used by Graflex for their camera lenses. This Durst-branded version is an enlarging optic for 35mm negative darkroom work.
The lens provides 50mm at f/2.8 with a flat-field enlarging formula for 35mm negative projection, and Durst enlarger mounting thread.
The f/2.8 aperture class is useful for darkroom composition brightness. This Durst Optar should not be confused with the Graflex/Wollensak Optar large format camera lenses which share the name but serve a different purpose.
Verify this is a Durst-branded enlarger lens (not a camera lens). Check element clarity. Test aperture ring. Confirm Durst thread compatibility.