There are a variety of applications which require threaded spacer rings. They can be used with reversing rings to increase magnification, or for mounting accessories to lenses where there is a front obstruction. They can be screwed together to make longer extensions. Used in conjunction with stepping rings, they can be used to make adaptor tubes. Each one of the rings listed has an effective extension of about 6mm.
There are a variety of applications which require threaded spacer rings. They can be used with reversing rings to increase magnification, or for mounting accessories to lenses where there is a front obstruction. They can be screwed together to make longer extensions. Used in conjunction with stepping rings, they can be used to make adaptor tubes. Each one of the rings listed has an effective extension of about 6mm.
