70-200 f/2.8 IS L II -VS- 135 f/2 L + 70-200 f/4 IS L

[KreutzerPhotography]

I am looking at print level. I always have bounced flash between 1/4 and 1/1 which gives be the power to shoot at 1/40-1/60th. Depending on the light and size of the room ISO 200-800. Always worked for me!

Canon 50D w/ 70-200 f/4L IS / 580exii (1/2 power)
Canon XTi w/ 16-35mm 2.8L ii / 480exii (1/1 power)

 

[Mt Spokane Photography]

Does anyone have experience with the Kenko dgx tele converters? I will probably go with canon but was curious about the kenko as it can be used with non tele lenses.

The Kenko is excellent. Its also a good buy. You have a 30 day return window at Adorama, if you decide its not what you expected.