Upload & Sell: On
The 7D focuses OK with the Kenko 2.0x TC, it even manages it with stacked 1.4x and 2.0x although IQ is in the toilet!
Second hand I can get a Canon mkIII 2.0x TC for £300, a 100-400L is around £725... I'm convinced that as soon as I buy a 100-400 they'll announce the replacement I might have a look at the Sigma 50-500 as well, the 150-500 I had was OK for the money. I was hoping that the 7D/70-200/2.0x might be good enough for my invited needs, but I wasn't too happy with the results. Although I...Show more →
I kept buying the newest iteration of Canon's 2X because they kept telling me I'd love "the new one", that has not been the case. Canon's 2X III is just about worthless on the existing 100-400. They make reasonable, but expensive paper weights. Sigma has always been "ok for the money".
Rumor has it that the new 100-400 will be released this year, but I wouldn't put much stock in that, given their inability to bring the 200-400 to market.