Wow... spectacular results re the 135 f/2... much better than I expected. I bought it for the extra IQ and extra stop vs the 70-200 2.8 at 135mm. Seems that adding Kenko 1.4x and 2x TCs results in slightly better performance vs the equivalent 70-200 setup 2 stops down (189mm f/5.6 and 270 f/8), and slightly lower performance vs the 70-200 one stop down (189mm f/4 and 270mm f/5.6). Not bad for an investment of $240 I can spread out across multiple lenses!
