I have the 70-200 IS2 and just ordered the Canon 1.4x teleconverter, should be here next week some time. I looked at the chart shots of this combo at http://www.the-digital-picture.com/ and liked what I saw. However, the shots are only at 200mm plus the converter. I read the info on the converter and it says its only compatible with 135mm and longer.
So my question is what to expect out of this pairing when zoomed under native 135mm? I am assuming it will not be very good on the short end. Is that what owners of this combo have found? Or is it still good IQ even on the short end with the converter?
Of course I'll find out for myself next week, but knowing what to expect will help me evaluate if its a good copy, so thanks in advance for sharing what you know.
For the converter being only compatible, it is with Lenses 135mm and longer (I THINK it works with some of the TSE and other specialty lenses). The lens + TC becomes a 100-280mm. The IQ should stay the same throughout the zoom range with a little loss (depending on if MkII or III).
Sort of. Traditionally, Canon TCs are compatible with zooms starting with 70-xxx and with primes at 135 and above. That said, people have used TCs on the TS-Es and TDP has reported that Canon TCs can be used on the 70-300L and the 28-300L past a certain focal length.
The 70-200 f/2.8 L IS II works well with TCs and it can be used over the entire range as RMC33 noted. Just be sure to AFMA the lens + TC combination (i.e. don't expect the AFMA for the lens to be carried to the combo). The bare lens will be better than the TC, but the 1.4x gives good results compared to the bare lens that you won't notice much of a difference.