size of nd filter for 50 mm stm canon

[echoyjeff2221]

Trying to look at nd filters for my 50mm stm that I bought recently
http://www.amazon.com/Canon-50mm-1-...pebp=1441144420743&perid=18Z1JSKNWCCRMJF594HS

what size mm nd filter should I get for this lens?

 

[480sparky43 42]

When I google photos of that lens I see a "ø49" on it. My guess is 49mm filters.

Look inside the lens cap. The number may be there.

If all else fails, RTFM.

 

[echoyjeff2221]

When I google photos of that lens I see a "ø49" on it. My guess is 49mm filters.

Look inside the lens cap. The number may be there.

If all else fails, RTFM.

got it, i see 49 mm too. didn't know that was for the filter