Step-Up Adapter M25.5-M46

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Step-Up Rings by Midwest Optical Systems (MidOpt) Use larger diameter filters on lenses with smaller diameter filter threads Often mandatory for shorter focal length lenses in orde r to prevent vignetting Available sizes: SU22.5-25.5 - SU77-105 Commonly referred to as a thread adapter Step-Up Rings are most commonly used to adapt a larger diameter thread on items such as ring lights and filters to a smaller diameter thread (generally the thread on the lens). Smaller diameter thread is male, larger diameter thread is female. Adapter Properties Male Thread M25.5 Female Thread M46 Manufacturer Midwest Optical Systems Step-Up Ring Downloads Show more