Specification & Models:
Step-Up Part Numbers
- SU22.5-25.5
- SU25.5-27
- SU25.5-30.5
- SU25.5-37
- SU25.5-46
- SU27-30.5
- SU27-37
- SU27-40.5
- SU27-46
- SU28-37
- SU30.5-37
- SU30.5-46
- SU34-37
- SU34-46
- SU35.5-37
- SU35.5-46
- SU37-43
- SU37-46
- SU37-49
- SU37-52
- SU37.5-46
- SU39-46
- SU40.5-46
- SU40.5-49
- SU42-46
- SU43-46
- SU46-49
- SU46-52
- SU46-55
- SU46-58
- SU49-52
- SU49-55
- SU49-58
- SU52-55
- SU52-58
- SU52-62
- SU52-67
- SU52-72
- SU52-77
- SU55-58
- SU55-62
- SU58-62
- SU58-67
- SU62-67
- SU62-72
- SU62-77
- SU62-82
- SU67-72
- SU67-77
- SU72-77
- SU77-95
- SU77-105
Step-Down Part Numbers
- SD27-25.5
- SD30.5-27
- SD34-30.5
- SD46-40.5
- SD49-46
- SD52-46
- SD52-49
- SD55-46
- SD55-49
- SD55-52
- SD58-46
- SD58-52
- SD58-55
- SD62-46
- SD62-52
- SD62-55
- SD62-58
- SD67-46
- SD67-55
- SD67-58
- SD67-62
- SD72-46
- SD72-55
- SD72-62
Step-Up Rings
- 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
Step-Down Rings
- 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)
Step adapter part numbers are made up of the lens thread size in mm and the filter size in mm. Ex: SU25.5-27; M25.5 (lens thread), M27 (filter thread) Available stock sizes are listed below.
