Jump to content

Diopter for my 17-40, do I really need one?

Recommended Posts

Hi all,


Been using a 17-40 on my 5D in Aquatica housing. Been hearing great things about using a B+W +4 Diopter on the lens for increased sharpness. First of all, is it really unsharp on the corners? Never thought so, but on the other side I always thought my 15mm pics looked sharper.

Second, does it loose depth of field and reduce the angle with the lens wide open (at 17mm)?





Thank´s, Nuno.

Share this post

Link to post
Share on other sites



  • Create New...