Difference between ef 2x and ef II 2x nedd answer fast

[BamaPhotoM]

I am trying to buy a canon 2x and I got a gu that wants to trade me a couple and non efII what the difference in them.

[Jimcolton]

By non EF do you mean FD mount?

[mbellot]

Check the TCon sticky in the lens forum, but (IIRC) the two major differences are:

1. The 2x Mark II is stackable with other TCons, the Mark I is not.
2. The optics were redesigned.

[malla1962]

I dont think the MK1 has weather sealing.:DDepending on what you put them on both crap!