Unless you have a camera lens with an aperture value of f/2.8 you had better plan on manually focusing your lens with a 2x teleconverter.? With the Canon 7D, 40D, 50D etc... you cannot auto focus any lens unless its maximum aperture is f/5.6.? You will have to get a 1D series camera in order to autofocus up to f/8, but they are quite spendy, which is why I don't have one yet!

I would stick with a 1.4x teleconverter, I use it almost full time with my 500mm f/4 and my 7D.? It retains sharpness quite well, about the only time I have it off is when I'm on a pelagic, or if the light is really really dim (early morning/late afternoon).

All my recent photographs on my flickr site, which includes many photographs from a recent trip to Mexico, were taken with the 1.4x

www.flickr.com/photos.shyalbatross

Cheers

Ryan Shaw
Tacoma, WA
rtshaw80 at hotmail.com
>Hi, after thanking everyone, I got a flurry of new emails, with some great
photos, and I am going to get the doubler after all. I have an ebook on
Exposures, and several other books on photography, that I think will really
help me with all the stuff I am still learning. I have seen some fantastic
photos, and great ones, with the same camera set up I have, adjusting to light,
as well as some that did not need to adjust their photos at all.Larry had a
great day yesterday at Bottle Beach! I guess you can teach an old dog new
tricks; they get bored with the old ones!


Vicki Biltz
Bonney Lake, Wa
vickibiltz AT msn.com