On Sat, 22 May 2004 21:10:13 +0200, Willem-Jan Markerink wrote: >On 22 May 2004 at 14:00, Rob Chandler wrote: > >> Hi >> >> If I use a 1.4x tele-converter on a 400mm lens, does the depth of field >> behave like a 400mm or a 560mm lens? > >560mm. >Note though that aperature 'shrinks' along with it, so there is no >netto gain in terms of a decreased DOF > >And the only thing a teleconverter basically does is enlarging the >center of the image....that is also why it works so nicely in >combination with the TS-E lenses, where the optically most critical >parts are on the edges, with a near-perfect center....so enlarging >that center still allows good quality. >-- >Bye, > >Willem-Jan Markerink >
Thanks for the info. I'll be using a 400mm with a 1.4x TC tomorrow. Rob * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
