Well that's okay. My manual focusing is fast enough for bird photography:-). Paul On Nov 21, 2006, at 7:40 PM, Bob Sullivan wrote:
> Too slow Paul... > > On 11/21/06, Paul Stenquist <[EMAIL PROTECTED]> wrote: >> Will it work with the A400/5.6, or is that lens too slow? >> On Nov 21, 2006, at 5:23 PM, John Francis wrote: >> >>> >>> On Tue, Nov 21, 2006 at 07:56:25AM -0700, Joseph Tainter wrote: >>>> With >200mm lenses, however, the AF is not good for anything but >>>> fine-tuning your manual focusing. >>>> >>>> ----- >>>> >>>> Thanks, Jostein. You may have just saved me some money. For bird >>>> photography, my manual focusing just isn't fast enough. I need AF. >>>> >>>> Joe >>> >>> The problem with using the AF adapter with long lenses is that it >>> only covers part of the range - you have to pre-focus to somewhere >>> in the approximate distance of your subject. >>> >>> Most of the time I use it on the back of my 300mm, and have had >>> no problems with the limited focussing range. In fact I see it >>> as an advantage; if the camera guesses wrong on the focus, and >>> winds all the way to the end stop before going back the right way, >>> this is much quicker with a restricted focussing range (after all, >>> the high-end lenses from other manufacturers have switches for >>> this). >>> >>> But if you can rough-focus to where you expect to be using the >>> lens the AF is fast - often faster, in fact, than a real AF lens. >>> I've found it to be perfectly satisfactory. This (*ist-D) shot: >>> >>> http://panix.com/~johnf/temp/justin.jpg >>> >>> was taken with the AF adapter on my 300mm/f2.8 Note the lack of >>> DOF (even at an effective shooting aperture of f10), but the auto- >>> focus was quite capable of doing its job. >>> >>> A drawback, admittedly, is that you are restricted to only the >>> central AF point. This may, or may not, be a problem for you. >>> But if it would work for you I recommend getting one; it's the >>> best bang-for-the-buck item in my camera bag. >>> >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
