Step-Down Adapter M58-M46Step 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

Includes the following Extension Ring

45 mm Distance Between Principle Points -22

Fixation Kit is NOT Included

6 - ƒ/22 Image Size Not Specified Image Circle Diameter Not Specified Imager Format 2/3″ Light Spectrum Visible Resolution (MP) 1

95 Operating Temperature Range -10 to +50°C Dimensions 29 mm × 29 mm × 29

overwhelming ambient light conditions

526 mm Exit Pupil Position -64

01 Operating Temperature Range -10 to +50°C Dimensions 51 mm × 51 mm × 76 mm Angle of View @ 2/3″ 6

Focal Length: 25mm

NK100 Sizes & Part Numbers

Educational material on optical filters and technical specs for each filter

HF16XA-5M Technical Specifications: