Fotodiox DLX Stretch Lens Adapter - Compatible with Leica R (LR) Mount Lens to Canon RF Mount Mirrorless Cameras with Macro Focusing Helicoid and Magnetic Drop-In Filters Lens Mount_Nikon S-Mount Composition screen has dovetail tracks

Composition screen has dovetail tracks for various focusing accessories

where increased haze threatens to make your photographs indistinct in color and clarity

• Do not operate in environments near flammable gasses or volatile liquids as this may increase the risk of explosion/fire

This is far more desired than the close-up lenses which are added to the front of the lens via filter thread

Fotodiox DLX Stretch Lens Adapter - Compatible with Leica R (LR) Mount Lens to Canon RF Mount Mirrorless Cameras with Macro Focusing Helicoid and Magnetic Drop-In Filters Lens Mount_Nikon S-Mount Composition screen has dovetail tracksDescription Specs Compatibility Notes Product Highlights: Mounts vintage Lenses to Canon RF Mount Mirrorless Cameras; infinity focus or beyond allowed Built in focusing helicoid provides macro focus for any lens as well as correction for back focus Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter Precision all metal construction with chrome plated brass mounts for secure and solid fit Limited 2 Year