All step up or step down rings do is adapt the diameter of the filter to match the lens diameter.
Step up step down rings photography.
Step up rings are the most commonly used form of filter adapter ring and enable photographers to use filters designed for lenses with larger filter thread sizes on lenses that normally accept smaller filters.
Fotasy anodized black metal filter step down ring set stepping lens adapter rings 82 77mm 77 72mm 72 67mm 67 62mm 62 58mm 58 55mm 55 52mm 52 49mm step down rings 4 5 out of 5 stars 181 9 49.
There are usually used to mount accessories.
For example they allow you to attach a 52mm filter to a lens with a 72mm thread size.
They adjust a larger lens thread to accommodate a smaller filter.
They enable you to adapt filter and lens accessories with smaller thread sizes to lenses with larger thread sizes.
Step down rings do the exact opposite of a step up ring.
1 things worth knowing about step up step down rings.
The opposite of step up rings are step down rings which essentially do the reverse.
Stepping ring screws onto camera filter screws onto stepping ring.
A ring that is larger on the filter side than it is on the lens side is known as a step up ring while a ring that is larger on the lens side than it is on the filter side is known as a step down ring.
Basically the corners are getting less light because of the tunnel that is created.
Step down ring top and step up ring bottom.
They don t have any glass or electronics so they have no bearing on the optical quality or features like autofocus.