PhotoNotes site navigation. About. Dictionary. Articles. Reviews. LOOKUP | FORUM | DONATIONS

 

The PhotoNotes.org Dictionary of Film and Digital Photography.

-----


Step ring.

A simple metal ring used to adapt a filter to a lens when the two have different filter thread diameters.

For example, let’s say you have a 58mm filter and you want to attach it to a 52mm lens. (that is, the lens has a filter diameter of Ø 52mm - not a focal length of 52mm) You could use a simple step ring to do it, which could be very convenient if you want to save money and camera bag space by buying only one set of filters.

There are two types of step rings - step up and step down. Step up rings are used for attaching larger filters to smaller lenses. Step down rings are used for attaching smaller filters to larger lenses.

There can be vignetting problems (darkening around the edges of a picture) caused by step rings, however. First, if the ring is very tall the additional distance of the filter from the lens may cause vignetting problems, particularly with wide-angle lenses. And second, adapting a small filter to a large lens with a step-down filter is rarely a good idea unless you don’t mind the vignetting effects that are likely.

Finally step rings can interfere physically with many lens hoods, especially if a very large filter is used on a smaller lens. (77mm filter on a 52mm lens, for instance)

cf. filter, filter threads, vignetting.

Entry last updated 2002-04-24. Term 1174 of 1487.


Previous term: step down ring.

Next term: step up ring.

 


-----

This document is copyright © 2002-2014 NK Guy, PhotoNotes.org. This information is provided with neither warranties nor claims of accuracy or completeness of any sort. Use this information at your own risk. All trademarks mentioned herein belong to their respective owners.

You may copy and print this document for your own personal use. You may not, however, reprint or republish this work, in whole or in part, without prior permission from me, the author. Such republication includes inclusion of this work in other Web sites, Web pages, FTP archives, books, magazines or other periodicals, CD-ROM and DVD-ROM compilations or any other form of publication or distribution. Please do not frame this site within another.

Please send comments or error reports using the feedback form.

-----