Norman Chappell wrote:
Wondering what the groups consensus of opinion is on NON Canon extenders (probably 1.4x), mostly for use with 100-400 lens on an EOS30/Elan 7E, both as a simple focal length multiplyer for nature shots, or in conjunction with a 500D close up lens. I mostly do competition slide work and need to know how they compare to the Canon under these high enlargement conditions. Or do I need to spend over twice as much on the real thing? What are the pros & cons? Also, can anyone confirm for me that with the Canon, I would definitely lose AF @ 400mm on the EOS30, due to f8 maximum aperture. But that with a 3rd party extender which doesn't report the aperture, I may still retain workable AF under bright enough conditions, while suffering AF hunting if conditions are a little duller. Appreciate any and all input. TIA. _________________________________________________________________ The Tamron 1.4x SP Pro Teleconverter for Canon (beige) is the best for the buck at $189. Every bit as good as the Canon 1.4x. At F8 you will lose AF except for the EOS-3 & 1V. Note sure of the 7E. BTW, I use it with the 100-400IS and an EOS3 and central AF point is fine. It auto switches to the central point like the Canon as well. Peter K * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
