Step-Up Adapter M34-M46 Format Monofocal_1/1.8″ The diameter of the filter

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)

Male Thread M55 Female Thread M72 Manufacturer Midwest Optical Systems

Can be used in conjunction with a filter

3 mm Angle of View @ 2/3″ 185° x 185° Back Focal Length 9

Step-Up Adapter M34-M46 Format Monofocal_1/1.8″ The diameter of the filterStep 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 order 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