Canon EF 70-200mm f2.8 + SpeedBooster vs Zuiko 150mm f2

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faunagraphy Contributing Member • Posts: 609
Canon EF 70-200mm f2.8 + SpeedBooster vs Zuiko 150mm f2

Every now and then, I get a mild case of GAS and the siren song of the Zuiko 150mm f2 starts drawing me in.

I own a Canon FD 300mm f2.8L which is a great lens, but hardly used ever since I got the 300mm Pro. I have it paired with a Mikaton Zyongi focal reducer for times when I need f2. Honestly, it affects the IQ but the Metabones FD-MFT SpeedBooster costs more than the 300mm f2.8 itself!

Oddly enough, the Metabones SpeedBooster for EF lenses is cheaper and provides the advantage of AF.

So here's a question: what if a nice lens like the 70-200mm f2.8L or its Sigma/Tamron equivalents in EF mount were paired with the Metabones?

Advantages I can see are:

  • 49-140mm f2 lens, with the flexibility of a zoom, instead of a 150mm f2.
  • Cheaper lens. With the SpeedBooster, this is still cheaper than the Zuiko 150mm used. Adapter can of course be used with other lenses.
  • Lighter than the Olympus by around 300 gm.
  • Can AF reasonably fast on non-PDAF bodies.


  • Bokeh perhaps not as good (whatever).
  • IQ not as good as the prime (but still great).

Do you see a problem with this? Would the 70-200 + Metabones be a better option than Zuiko 150mm?

Is there a catch?

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 faunagraphy's gear list:faunagraphy's gear list
Olympus OM-D E-M5 Olympus PEN E-PL6 Nikon D500 Olympus E-M1 II Olympus Zuiko Digital ED 50-200mm 1:2.8-3.5 SWD +23 more
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