M42-M42(36-90) M42 To M42 Mount Lens Focusing Helicoid

Features:

Suitable for M42 mount lens without focusing ring.

Can be used as a macro extension tube.

No electronic , manually controls aperture and focusing.

Aluminum alloy material, precision machining, durable and sturdy.

Easy to install and simple to use.

Specifications:

Material: Aluminum Alloy

Lens Compatibility: M42 screw mount lens

Length: 17mm-31mm/ 25mm-55mm/ 36mm-90mm(optional)

Packing List:

1 * Adapter Ring

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