Very preliminary thoughts on the 40-150 F2.8

Just received it yesterday. Took a few of the dog (I'll spare everyone) and my son practicing soccer. Thoughts:

1. For me, it's big. I've never owned any F2.8 zoom so it is a big change and will take getting used to but I think it will be worth it.

2. It is very sharp.

3. Proper technique will be much more important than when using my Panny 45-150 F4 - 5.6. Several factors:

a. Hand holding is more difficult with a larger heavier lens. Motion blur from camera movement will be an issue.

b. Depth of field is very shallow at times when wide open. I can see that focusing on the wrong eye will go from no big deal to missed shot.

c. Tracking moving soccer players will be harder due to the size and weight. I'm used to a very light setup and this will required some practice.

4. It is a damn pretty lens.

5. Built like a tank.

6. I need to rethink my camera bags and straps.

7. I need to try out my tripods and heads to make sure they are up to the task.

8. Makes me want the E-M1 to get the better C-AF since photographing my son playing soccer was a big reason for the lens.