OCT-18 lens to Canon EOS (EF) camera adapter for zooms 37mm clamps Such setup is great for

Such setup is great for portrait and macro shots

two of these can be used with the filter adapter screwed into the front and the filters mounted on the 3x afocal adapter so that filters can be changed without threading and treadling the filters

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and don't clear mirror and/or inner camera elements

Simple test is just to remove original canon lens and place your OCT-18 lens holding it in hands

OCT-18 lens to Canon EOS (EF) camera adapter for zooms 37mm clamps Such setup is great forThis adapter can be used to install some LOMO (Lenkinap, KMZ) lenses with OCT 18 mount (for turret Konvas) onto cameras with EF mount (Canon EOS). It allows infinity focus if you lens can physically fit it (read details below). This is simple adapter it holds mount of the lens so it can't rotate. This means that it fits zoom lenses perfectly (Foton, Lenar, OPF series). But most of OCT 18 primes needs to rotate in the mount in order to focus properly.