Originally posted by joe.penn Dave, thanks for posting those. I will be purchasing a 2x DG TC sometime this week and will give it a go on the 300 2.8.
Ya, same here, it seems to do the same thing with my combo of this, Another thing I noticed with the combo using the 1.4 TC is the bokeh is kind of, well, horrendous - I am guessing the extra elements in the TC is the reason for this.
It is a great lens, my only gripe is the weight of it, I can hand hold it for maybe a minute or so but after that I need a rest. It's hard as I shoot from watercrafts most of the time (kayak and pontoon) and can't really use a support system as most of the time the kayak or pontoon is moving up and down and side to side. When I am in blinds, I do use a shooters bi-pod with a ballhead, the bi-pod setup is great as it allows me to lay on the ground and use it, a really good setup that I can recommend to anyone who shoots wildlife (and even sports) from the ground or even at knee level.
I think @Lowell Goudge is right on though about the use of TC's and different lenses, some lenses just weren't made for TC's or designed with performance in mind when using TC's.
The weight is not a problem for me, but that`s maybe because I`m used to dragging around cilinderheads, pistons and stuff for a living. Shooting from watercrafts is indeed a challenge, especially on open sea.
Regarding the 300 F2.8...I`m sad to say it`s postponed. While the funding was there, the need for another car was more urgent. Can`t have both
Originally posted by maverickh Yep, that`s a sharp picture (maybe a tad oversharpened). The detail is awesome.
Originally posted by iittoo Use with Sigma 1.4x Apo Ex Dg
Those are very nice exemples with the 1.4, my compliments. While the bear lens doesn`t suffer from CA, it does produce some with the TC.