Step-Up Adapter M40.5-M49Step 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

01 mm Entrance Pupil Position -13

9° Back Focal Length 17

HF6XA-5M Technical Specifications:

Often mandatory for shorter focal length lenses in order to prevent vignetting

22° Front Principle Point 1

5 Minimum Object Distance 100 mm Front Diameter 39 mm Focus Control Manual Iris Control Manual Flange Back in Air 17

HF25SA-1 suggested replacement is HF25XA-5M

526 mm Exit Pupil Position -36

smaller diameter thread is female

75 mm Chief Ray Angle 11

BP800 Near-IR Bandpass (745-950nm)

02 Operating Temperature Range -10 to +50°C Dimensions 33 mm × 33 mm × 53