Originally posted by MetteHHH This sums up my situation better than anything I could have expressed. Actually, I sometimes do feel convinced that I picked the wrong system: Bird photography is my main interest, and slow / imprecise AF, lacking of tracking and shortage of affordable long tele lenses all tell me I should have picked another brand. On the other hand, I LOVE my DA* 300mm f4 for its solidity, sharpness and pretty bokeh - it's just too short. My current compromise is using a 1.7x TC and cropping more than I ought to. My immediate roadmap is upgrading the house until the AF kills fewer opportunities and cropping begins to hurt less (I think the optical limitations of my 300mm are less of an issue than the limitations of the k5 sensor at the moment).
Bird photography is something I started to take seriously just this year, and I am feeling the same problems that you describe. I bought the Sigma 500mm f/4.5 APO EX DG to help, but would rather have bought a lighter Pentax WR lens.
I too like the DA* 300mm f/4, and bought mine with the expectation that I would supplement it with the 1.4x Teleconverter on the roadmap. I wish ....
Originally posted by Andi Lo I really like the idea of "set of compromises". It really describes the situation much better than any of the metaphors we had so far
AFAIK the situation with longer glass in other mounts are the same, it's also about $$$ / mm. At the moment the best crop bodies with high FPS from both companies are already 4 years old (7D and D300), so you'd be wise to wait before switching. For AF you will gain considerably over the K-5 but not in anything else, long glass in canikon is still expensive anyway, but perhaps you'd do better with getting any particular lens you want in the used market as there are more floating around.
Perhaps Pentax will release a really good TC or an affordabe DA 400, and the chirstmas camera has great af
For me, a really good 1.4x Teleconverter would make my 300mm f/4 into
an affordable 420mm lens - because I already have the 300mm lens! And if Pentax launches a camera before Christmas that has "great AF", (fast, accurate, several points near the middle), and isn't worse than the K-5IIs in any respect, I will buy it.
But more fps, (for example, switchable between 5 fps and 10 fps), and more pixels, (because I sometimes crop up to half the pixels and still want to print at A3+ or larger and would like more headroom), would make that a super camera.