I can't accept m43 mount.

I have an M43 mount: EM5, along with my E3, E330, and E1. I also have a ZD 35-100. The combination looks something like this:

Note that I do have the grip installed - without it, handing is awful. With the grip, handling is pretty decent, the grip makes the EM5 + HG/SHG quite manageable.

Do I hang this from my belt? Of course not, way too heavy. But... when I put the 35-100 on my E3, do I hang that combination from my belt? Of course not, way too heavy. The 35-100 is a handful, whether it's on the EM5 or E3. Teleconverter? The MMF adapters are as stoutly built as the TC's, so a TC and the converter is about the same as stacking TC's. And I wouldn't use a TC with the 35-100, I'd break out the 50-200.

I bought the 35-100 about two months ago, specifically to use on the EM5. Why? Because I've seen too many gorgeous shots taken with it to pass up the chance to get one. Because the Panny 35-100 is an overpriced, mediocre rendering lens at $1500, while I picked up this absolutely mint beauty for $1200, thanks in no small part to people claiming that 4/3 is dying. Most if not all of them have never used HG or SHG on an EM5. For that matter, I bought the EM5 specifically to use with my HG and SHG glass, to get the greatly improved sensor.

You can talk yourself into believing that a future M43 body that will AF ZD glass quickly is a bad idea. In which case, the only alternative you have is to sell off HG and SHG, and go to FF.

Or, you can combine the best ZD lenses with the best sensor, and see what happens when the weakest link in 4/3, the somewhat mediocre sensor, is replaced.

From someone who has used the combination extensively since last April, I believe the main objections to HG/SHG on a larger M43 body are based more on entrenched thinking, not technical shortcomings. Even with the slower AF, I love HG and SHG on the EM5 - M43 has nothing like this, and won't get it in a smaller form.

Here's one quick effort with this combination, the cattail that the E3 kept locking on the wrong target. It is only with the EM5 RAW's ability to manipulate highlights and shadows that I could get that level of DR and darken the background that much without losing detail on the highlights or have artifacts appear. RAW out of the E3 couldn't even get close to that, and I tried.