I am a ranch manager on a 20k acre ranch in deep SW Tejas. We have three miles of live ( kinda running [of late] ) water. ie bird and wildlife central. I enjoy shooting wildlife and obviously have abundant opportunities. :smile: My photography urge is high these days. It ebbs and flows if you know what I mean. It's been slowly building last couple of years and if past performance is an indication I will get a couple years out of this 'photo maximum'. Plus my times of changes are behind me and I may stay with this job and this location till I croak. I'm 62. I'm over 20 miles from the nearest wide spot in the road and 4 hours from a city. What else am I gonna do out here besides work, hunt, fish and photo? So much for the intro. I really like m4/3 and will likely stay with it. But my history is one of changing formats, tools, and approach readily in response to the quarry. Right now I need long glass for the critters. Lately I have been bugging resident denizens by PM who are doing amazing work with m4/3 and big legacy telephotos to get their perspective on the genre. I spent two days immersing myself in the market place and am ready to strike at a moments notice. $2K? Phaa! You can't take it with you and I am footloose and fancy free. Kindasortamostly. But something is not letting me pull the trigger. I already have figured out that it is a safer bet to invest in a better example of the required lens: Canikon 400mm or 500mm manual focus so that in the event the bottom drops out of my wanna, I can sell it easily. Or say I get so into it I decide to sell my boat and buy a Nikon D800 and 600mm AF lens to go with it. Part of what has me treading water is my fear that I won't be able to focus the old stove pipe. I understand telephoto photography. Heavy Gitzo, gimbal head and patience already in the garage. Some experience banked. The other thing hesitating my mind I guess is the unknown. What am I missing? Although given my plan to buy a good piece that I can remarket with most likely only the hassle of fleabay ... PITA that it is ... still I feel I must be overlooking .... something. For anybody wanting to chime in: I'm pretty sure 400mm is enough for me. I have my ways of getting pretty close to our fauna out here. Also I've already decided that if a m4/3 shooter wants to go this route it is a waste of time to mess with any legacy glass of the second or third order ... given my readiness to risk capital and having no great care as to cost . ( Before you judge me know that I spend money on living rather than health insurance and yes I know that this may kill me. Meh! ) i.e. I'm not of the 1%. As an aside: I wonder if legacy telephoto shooting with m4/3 cameras might deserve its own niche somewhere hereabouts ?