Bresser Explore Scientific Special T2-Ring Canon 1,5Mm Light-Path Clearance

This Special T2-Ring For Canon Dslr Camera Offers A Extreme Short Light-Path Of Only 1,5Mm. Regular T2-Rings Needs A Light-Path Of About 11-12Mm And If You Have A Close Backfocus Situation These Certain Millimeters Are Making The Difference To Reach The Focus.