How to solve the NEX7 lens dilemma?

Note: There are several Canon EF/NEX "Smart" adapters, 2 from Metabones, and few from other producers, such as Techart or RJ.

Size and weight - approximately same. Both are rather big and bulky, if the size matter.

Metabones = 0, Sony = 0

Metabones Smart adapter allow slow AF only with some EF lenses, LA-EA2 - fastest AF with A-mount lenses, that you can achieve with NEX. Metabones = 0 - Sony = 1

Several Canon lenses have Image stabilization. Metabones can engage it. Very few A - mount lenses have image stabilization. Metabones = 1, Sony = 1

Metabones Speed Booster (new adapter from Metabones) allow use of the almost identical FL on FF and APS-C. In other words, 35mm f2 FF lens will result in a 25mm f 1.4 lens on APS-C, which after multiplying it with a 1.5 crop aspect, will result in a 37mm f2.1 FF equivalent. Using 35mm f2 lens with LA-EA2 will result in a 52.5mm FOV, f3 DOF - FF equivalent. Metabones SB =2, LA-EA2 =1

Canon EF lens range is much wider than A-mount lens range, including some unique solutions such as MP-E65 and TS-E 17. (no, I will not mention EF 1200 f5.6. It's too small for the NEX)
Metabones = 3, Sony = 1

Metabones Smart adapter cost 399 USD, Speed Booster - 599 USD without shipping. Sony LA-EA2 - 279 USD. Cheaper versions of EF/NEX smart adapters could be found for 212 USD including shipping. I would give a point here to Sony, because it is more probable to find used one LA-EA2 than EF smart adapter.

So, final - Metabones = 3, Sony = 2

But all that doesn't mean nothing, if you need AF.

If you have A mount lenses, LA-EA2 is the way to go.

Metabones, for those who comes from Canon is certainly interesting option.

If you don't have either, don't bother IMHO. There are many other, cheaper, smaller, IQ wise comparable solutions, including some native E-mount lenses. (I consider SEL 10-18, 24 f1.8, 35 f1.8 and 50 f1.8 - very good lenses, and probably best overall solutions in the respective FL for NEX system).

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