Step-Down Adapter M72-M58 Female Thread_M52 24 mm TV Distortion (%)

24 mm TV Distortion (%) -1

54 mm TV Distortion (%) -1

5 - SD82-77

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)

27 mm Rear Principle Point -18

Step-Down Adapter M72-M58 Female Thread_M52 24 mm TV Distortion (%)Step Down Rings by Midwest Optical Systems (MidOpt) Use smaller diameter filters on lenses with larger diameter filter threads The diameter of the filter or lighting to which step down rings are coupled will be much smaller than the diameter of the lens (often resulting in vignetting) Available sizes: SD27 25. 5 SD82 77 Commonly referred to as a thread adapter Larger diameter thread is male, smaller diameter thread is female. Adapter Properties Male