400 mm+
 

I shoot a lot of nature and have been using my long Nikon glass with a converter. Unfortunately, I have to manually focus and set exposure, and sometimes I'm just to slow for a quick moving subject. I'm told the Lumix 100-400 will focus and set exposure with the LS300, but I wonder if there is a way to get auto focus and exposure for a longer length. I'd certainly consider teleextenders and even a custom mount if that would get me greater focal length and auto focus and auto exposure.

Re: 400 mm+
 

I have several Nikon lenses I use with my LS-300 and would love to have auto focus and camera controlled aperture. But I have not heard of an active F Mount to MFT converter. I believe they exist for Canon lenses and possibly others. As far as I can tell Nikon glass users are stuck with manual focus and aperture.

Re: 400 mm+
 

Autofocus is hit or miss with the LS300 and the Metabones adapter for EF lenses. Mostly miss...

Re: 400 mm+
 

Nope, not gonna happen. Neither Panasonic nor Nikon will divulge the proprietary trade secrets engineered into their lenses. JVC's hit-or-miss problems with reverse engineering MFT electronic lens protocols is evidence of how difficult a challenge it can be.