i have a sigma 70-200 f2.8 EX HSM and a Sigma 135-400 f4.5-5.6.
to cut down on space used in my bagpack i was thinking of replacing the 135-400 with 2 x Converter for the 70-200.
Has anyone used a 2x converter on the 70-200? How is the quality of photos taken with it? I guess noone will have a 70-200 with a 2x converter and a 135-400 and can email me some test shoots. IS there a shop in london where one can rent a sigma 2x converter for a day to test it?
Any help would be appreciated.