M42x1 female to M58x1 male thread adapter for focusing helicoids

• Front thread - M42x1 female thread
• Rear thread - M58x1 male thread
• Thickness - 5mm

Made of high quality aluminium alloy.

This adapter allows using M42 lenses on M58 helicoids.

Shoulderless design means absence of extra light path that may be necessary to keep ability of infinity focus for some lenses.