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Project 7AB:  Currently our Type 2 is designed for Nikkor-N 5cm F1.1, and is patent pending for approval.  We are now considering if this magnificent design can also be applied to Leica lenses with 58mm and 60mm. 

Very few lenses were made with 58mm diameter filter size - Project 7A

Noctilux-M 50mm F1 (I) (1975-1978) - 58mm

Summarex 8.5cm F1.5 LTM (1942-1954) -58mm

Nikkor 8.5cm F1.5 LTM (1952) ​- 58mm 

60mm Lens Hood fit on the following high speed lenses - Project 7B

Noctilux-M 50mm F0.95 ASPH (2008 to present) - 60mm 

​Noctilux-M 50mm F1 (II) (1978-1982) - 60mm

​Noctilux-M 50mm F1 (III) (1982-1992) - 60mm

Noctilux-M 50mm F1 (IV) (1993-2008) - 60mm 

Summilux-M 75mm F1.4 (1980-2007) - 60mm 

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