Step-Up Adapter M25.5-M30.5 ƒ/N Max_ƒ/1.8 45 μm Weight 185 Grams

45 μm Weight 185 Grams Mount C-Mount Filter Thread M49-0

75 Minimum Object Distance 900 mm Front Diameter 51 mm Focus Control Manual Iris Control Manual Flange Back in Air 17

75 mm Chief Ray Angle Not Specified Front Principle Point -35

50 mm Chief Ray Angle 7

Step-Up Adapter M25.5-M30.5 ƒ/N Max_ƒ/1.8 45 μm Weight 185 GramsStep 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