Copper core M58-M58 (36-90mm) focusing ring front and rear ports M58

Grafting of focal rings

 

Front and rear mouth: M58

Pitch: 0.75

The M58 threaded multi-threaded focusing ring is a very practical focusing ring,

designed to provide focusing function for various lenses attached to other bodies.

When we want to attach some classic old men (old copper heads, leather-cavity heads,

land-based heads, even movie lenses, etc.) to modern popular fuselages, adjust

 

The grafting of the focal ring becomes an indispensable step, and the use of this ring

can achieve a multiplier effect with half the effort. It can be used as a lens without

a focus system after changing the lens, or it can be added as a macro focusing adapter.

The telescopic rails of the front and rear barrels of the focusing tube are

made of pure copper, and the adjusting ring is made of aluminum alloy,

all blackened and matted. The barrel is thicker to withstand heavier lenses.