Deliberating between the 300 F4 and 100-400 - used both?

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Gary from Seattle Veteran Member • Posts: 4,107
Deliberating between the 300 F4 and 100-400 - used both?

I have upgraded my body to the EM-1 II and find the AF much faster and better than the EM-1 I; currently using the 75-300. If you have used both, how do you compare them?

1) With the 75-300, my lens, the IQ is pretty good throughout but my keeper rate on birds is probably 30-40%. So, how about the relative IQ of the 300 and 100-400? I am aware the 100-400 falls off at 400 some. Also, is there substantial sample variation - I'd expect little with the 300?

2) AF accuracy; any difference here?

3) AF acquistion speed and CAF fidelity with the EM-1 II body? With my 75-300 and my body I really can't acquire focus quickly enough when birds are fast moving.

4) Zoom stiffness and some mount issues I am aware of with the 100-400. That is not an issue as I will only buy a lens I have tried out, particularly with the 100-400.

5) I realize the flexibility of the zoom and the presumed (see above) high IQ of the 300.

6) Finally, image stabilization. I am aware for fixed subjects that ISO and SS are tied to aperture and that the advantage there goes to the 300.

What are your experiences with both of these lenses, or if you have one or the other, what would you say about these lenses? Is the image quality and keeper rate quite good or would you say excellent?

 Gary from Seattle's gear list:Gary from Seattle's gear list
Olympus E-M1 Olympus M.Zuiko Digital ED 75-300mm 1:4.8-6.7 Olympus M.Zuiko Digital ED 60mm F2.8 Macro Panasonic Lumix G X Vario 35-100mm F2.8 OIS Olympus 12-40mm F2.8 Pro +1 more
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