The last one is the sort of bird shot I might attempt. Another thing to think about is that new lenses may be technically better but will they still be working in 30 years time? I suppose the more mechanical modern lenses will still be useable long after their AF circuitry has crumbled away but the trend now is more for fly by wire lenses and I guess that when the electronics dies you wont be able to AF them? Dunno. I have electronic gear that's 30 years + old but I've kept it going myself and that's something that I wont be able to do with a modern lens as the surface mount tech and printed connection leads etc probably aren't realistically fixable on the dining room table plus I'm getting old too. I did think about costs and longevity and the possibility of switching systems when I bought the A7 and that's partly why I still only have three native lenses, the kit lens which I never use and was on reflection a waste of money and the excellent 35mm f2.8 and 55mm f1.8. All my other lenses are manual and will still hopefully be useable on some future Sony or Nikon in another 30 years time.