Step-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.
|Manufacturer||Midwest Optical Systems|
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