EF 100-400 F4.5-5.6 W/ 1.4 TC

[soylentgreen]

I was considering upgrading the 100-400 also, but the 4.5-5.6 gets me. That is pretty slow to begin with and the 1.4x or 2x TC will only make it worse. People swear by the lens though. I do nature photo with as much natural light as possible so will probably use it straight up without the TC. My 1.4x is curretly married to my 70-200 f/2.8 L IS and they work extremely well in tandem. Will throw ont he 300 f/4 L IS w/ 1.4X TC if I need more reach, but IQ suffers unless I stop down to like f/8 or more. Best have a tripod handy, IS really struggles at 420mm.

 

[The_Caper]

Thank you very much all:

I think I will start with the 100-400 using it straight up. Later when I have more cash I will invest in the 300 F4L IS with 1.4 X TC

Cheers all.