Step-Up Adapter M46-M52Step 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

70 mm Chief Ray Angle Not Specified Front Principle Point -37

Male Thread M49 Female Thread M52 Manufacturer Midwest Optical Systems

526 mm Exit Pupil Position -45

1° Back Focal Length 12

526 mm Exit Pupil Position -102

526 mm Exit Pupil Position -191

Male Thread M72 Female Thread M58 Manufacturer Midwest Optical Systems

HF25SA-1 suggested replacement is HF25XA-5M

This lens series has been discontinued and has been succeeded by the HF16HA-1S

Repeat the same cleaning method to the other side of the lens or filter

HF16SA-1 suggested replacement is HF16XA-5M

55 mm TV Distortion (%) -0