E-M1 CAF compared to D800 question

steppenwolfer wrote:

Currently I own D800 and 80-200 2.8 D AF, mainly as action photography combo (read my dog photography).

Here is my flickr album with some examples: https://www.flickr.com/photos/93055168@N04/sets/72157633815940931

Current combo (d800 and 80-200) also struggle sometimes with my dog - it is smallish and very fast, so it is hard to keep AF point on it all the time. Biggest problem is C-AF when dog comes near me, since in that range lens has longer steps to focus and usually it just can not keep up.

I can't really answer your question, but I can tell you that a Nikon 80-200 D lens, which is the screwdrive version, and not the AF-S version, can't compare at all with the Nikon AF-S, ultrasonic focusing lenses. The 70-200 2.8 AF-S lenses, both  I and II, are lightning fast in focusing.

Lately I read that E-M1 with latest firmware is capable of excellent CAF. I also saw good examples from capable photographers. Mostly I see that those results were achieved with 40-150 2.8 lens.

I saw that currently Olympus offer cash back for Olympus 75-300, so I am considering purchase of that lens. How good is this lens for AFC on E-M1?

Is there anyone that used to have D800 and went to E-M1, so can compare C-AF?

I am currently on a kind of a crossroads what should I do. On one hand I have tried and true D800 for which I am considering new 70-200 f4 lens which has very good reputation and weight and size wise is near 40-150 f2.8.

On the other hand, E-M1 + 40-150 2.8 would be my entry to one system photography which in my opinion is better and more friendly to my pocket on the long run. Also my GF is now m4/3 photographer, so she could benefit from this also.

I also considered selling off m4/3 and get bridge camera RX10 or FZ1000 for light travel. But I suspect quality won't be up to standard that I am used to with m4/3.

I would be grateful for any input!

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http://www.flickr.com/photos/93055168@N04/