• Front side - M40.5x0.5 male thread
• Rear side - M39x1 male thread
• Max. diameter - 44 mm
• Distance between flanges - 4 mm
• Weight - 10 g

This adapter allows using lenses with M40.5x0.5 filter thread (like Rodenstock Rogonar-S 4.5/60mm) on M39x1 camera mount in reverse direction for macrophotography purposes.

Made of anodized aluminium.

Compatible lenses are:

• EL-Nikkor 4/40mm N
• EL-Nikkor 2.8/50mm N
• EL-Nikkor 2.8/63mm N
• EL-Nikkor 4/75mm N
• EL-Nikkor 5.6/80mm N
• EL-Nikkor 5.6/105mm N
• Old EL-Nikkor 2.8/50mm
• Old EL-Nikkor 3.5/63mm
• APO-EL-Nikkor 5.6/105mm
• Rodenstock Rogonar-S 2.8/50mm
• Rodenstock Rogonar-S 4.5/60mm
• Rodenstock Rogonar-S 4.5/75mm
• Rodenstock Rogonar-S 4.5/90mm
• Rodenstock Rogonar-S 4.5/105mm
• Rodenstock Rodagon 4/35mm
• Rodenstock Rodagon 2.8/50mm
• Rodenstock Rodagon 4/60mm
• Rodenstock Rodagon 4/80mm
• Rodenstock Rodagon 5.6/105mm
• Rodenstock Rodagon 5.6/135mm
• Rodenstock Rodagon-WA 4/40mm
• Rodenstock Rodagon-WA 4/60mm
• Rodenstock Rodagon-WA 4/80mm
• Rodenstock APO Rodagon-N 2.8/50mm
• Rodenstock APO Rodagon-N 4/80mm
• Rodenstock APO Rodagon-N 4/105mm
• Rodenstock APO Rodagon-D 4/75mm
• Rodenstock APO Rodagon-D 4.5/75mm
• Rodenstock APO Rodagon-D 5.6/120mm
• Schneider Componon-S 5.6/100mm
• Schneider APO-Componon HM 5.6/120mm
• Vintage Schneider lenses - Componar 135mm, Componon 135mm, Comparon 150mm.