Unless you have unused image circle available to be blocked with the step down ring or unless the filter threads are far enough outside of the lens angle of view to accommodate the ring you will experience mechanical.
Step up ring adapter.
Step down and step up rings allow you attach different accessories to a lens that what the filter thread would normally allow.
The adapter ring s first number is the size of the male thread that screws on to the existing lens.
Adapter rings are labeled from the camera to the filter.
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This step up ring.
Knowing the size of your camera lens and filter is the critical factor when determining step up ring size.
As an example if you own three lenses one with a 52mm thread another with a 67mm thread and a third with a 77mm thread you want a filter to fit the widest diameter thread size in this case 77mm and a pair of step up rings 67 77mm and 52 77mm to.
Choosing camera step up rings.
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Filters used on step up adapter rings are typically circular polarizing filters or neutral density filters.
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Although step up adapter rings all serve the same purpose it s a good idea to consider a few things before purchasing.
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The starting point for configuring a step up ring system is to establish a pecking order from widest diameter thread size to the smallest.
A step down ring will allow accessories with a smaller filter thread to be used on your lens.
The second number is the size of the remaining thread a female thread.
Step down rings are also available but they seldom make sense.
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Adorama step up adapter ring 67mm lens to 77mm filter size.