Step-Down Adapter M40.5-M37Step 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

3 mm Angle of View @ 2/3″ 23

High Peripheral Light Transmission allows for stable imaging

guarding against movement due to shock or vibration

Male Thread M82 Female Thread M72 Manufacturer Midwest Optical Systems

Male Thread M77 Female Thread M62 Manufacturer Midwest Optical Systems

63 mm Distance Between Principle Points -11

13 mm Distance Between Principle Points 29

BP505-27 Cyan Bandpass Filter

Made In Japan

Product Line / Series HF-XA-5M Lens Type Fixed Focal Length IP Rating Not Specified Focal Length 35 mm ƒ/N ƒ/1

DF6HA-1S Technical Specifications:

30 mm Distance Between Principle Points 42