Tele-converter - a newbie question

[lensmen]

Hi

I loved snapping tightly cropped photos of birds, insects and animals plus the occassional humans.

Sample shots (http://photobucket.com/albums/v258/Snoopy88/?start=all)

Owned the 100-400L and was wondering would a 1.4X or 2X be a worth while investment ? I still want the IS function

Also, what about non Canon telecon. Any good ?

Will be in HK next week and would be time to have a look at the telecon and the 70-200L F4.

Comments appreciated.

Cheers

[tommykjensen]

Have a look here:

http://photography-on-the.net/forum/showthread.php?t=41922

[lensmen]

Have a look here:

http://photography-on-the.net/forum/showthread.php?t=41922

Thanks Tommy, this is great help.

Still keen to hear from the forumers who used the 100-400L + TC setup.

Anyone ?

[RichardtheSane]

OK, you will loose AFon your 300D if you stick either tele convertor onto the rig, but you will still benefit from IS.

[lomond]

Still keen to hear from the forumers who used the 100-400L + TC setup.

Anyone ?

You will retain IS but loose auto focus.

If the bird, insect or animal is stationary and you have time to focus manually I found it OK.
I would stick with Canons TC.

[lordjim]

The new Tamron SP AF 1.4X is very good but relatively expensive for a third party extender (although about 40% cheaper than the Canon). Not used with a 100-400 but with a 70-200 F4L. Works well but you loose some sharpness and about 10% in image quality. I imagine the results should be similar with 100-400 although you can not avoid loosing AF with a 100-400 (well actually it seems that you can avoid loosing AF by taping some of the pins but this is not recommended). Hope that helps.