Re: How does a TC work? (Was: DOF with and without 2x TC)

Kelvin Ang <[EMAIL PROTECTED]> writes: > What I meant to ask in the original post is that yes > I'll be composing the shot similarly, but in one case > I'll be using a 50mm f1.4 with TC and another case > without. Of course, with the TC the lens is > effectively 100mm f2.8, although the lens is w

RE: How does a TC work? (Was: DOF with and without 2x TC)

> My impression of a TC (I don't know if I'm right), is > that it takes the middle portion of the image formed > by whatever lens it's attached to, and magnifies that > portion. . . . . > > That being the case, wouldn't the "100mm f2.8" lens > have the same DOF as the original 50mm f1.4?

Re: How does a TC work? (Was: DOF with and without 2x TC)

Hi, Thanks for the replies. What I meant to ask in the original post is that yes I'll be composing the shot similarly, but in one case I'll be using a 50mm f1.4 with TC and another case without. Of course, with the TC the lens is effectively 100mm f2.8, although the lens is wide opened at f1.4.