Step-Down Adapter M30.5-M27Step 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

Permits viewing at a 90° angle

1 μm Weight 90 Grams Mount C-Mount Filter Thread M30

Male Thread M49 Female Thread M48 Manufacturer Midwest Optical Systems

57° Front Principle Point -100

Male Thread M46 Female Thread M58 Manufacturer Midwest Optical Systems

526 mm Exit Pupil Position -35

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

5 CU700-25

Swivellink AFSB-3-12

Swivellink AFSB-552XS-K-IVG

Filters included in the FS100 have a surface quality of 60/40

02 mm Entrance Pupil Position -26