Filters

[bdv]

I am new to the DSLR game and had a question about filters specifically, and attachments in general. When sizing, do you always go 2mm larger than the lens size? Thanks in advance for any light shed.

[VegasMike]

I don't think so. Usually it is marked on the lens itself. I know my kit Canon lens is a 18-55mm and the lens takes a 58mm filter. For my 70-200mm it takes a 77mm filter. I also use a step down ring for my largest(77mm), expensive filters to fit my 17-70mm that takes a 72mm filter.

Mike

[dcclark]

The lens should indicate its filter size -- get exactly that size, or it won't fit!

The most common sizes are 52mm (usually for small lenses, especially kit lenses), 72mm, and 77mm.

[OsmosisStudios]

Or, get all your filters in the 77mm size (which is the most common, Pro size and often the largest) and simply get step-up rings for each lens. This minimizes the total number of filters you buy and, while more expensive per filter, will save money in the long run

[bdv]

Thanks ya'll. Would that be the number on the bottom of the lens?

[dcclark]

Maybe. What number do you see?

On my Nikon lenses, the filter size is indicated by a 0 with a slash through it, and then the number in millimeters, like this:

∅72