I plan to use the 100-400 S more for larger mammals and video work, and also it's much lighter to carry hiking than the 180-400 TC14.
The 400 f4.5S is ideal for birding and more paired with the 800 PF.
Yet another explanation is it's wise to have Redundancy especially on a trip if a lens breaks.
The 100-400 is the SwissArmy knife lens
The 400 f4.5S is ideal for birding and more paired with the 800 PF.
Yet another explanation is it's wise to have Redundancy especially on a trip if a lens breaks.
The 100-400 is the SwissArmy knife lens
Bumpity, because I just got a 100-400, which I'm using alongside the 400 4.5 for the next few weeks to make the determination which one works best for me. I love the 400 4.5, it's all you could ask for in a lens, but it isn't really bringing anything to the table because for my birding, 99% of the time I'm using the 800PF. One weakness of the 800PF is when I'm working w/ birds that approach under that 16' MFD. Yes, the 400 4.5 and it's ~8' MFD give some more flexibility, but often times even that isn't enough, and that's where the short MFD of the 100-400 comes into play. This lens will allow me to get shots that I am not able to get w/ either the 400 4.5 of 800PF, and not just for birding: I think it'll open up other types of photography as well.
One hesitation about selling the 400 4.5 is the idea of using it as a minimal travel/birding kit w/ the 1.4 TC, especially w/ the Z8 coming sometime in the near future. Yet, the 100-400 isn't that far off weight/size wise, and having a zoom for that purpose seems like common sense.
So yeah: 400 isn't my primary focal length, so it makes more sense to cover that range w/ a zoom, while also gaining a ton of versatility. Having owned and immensely enjoyed the Canon EF 100-400 II in the past, I think this is the right move for me.