I have a K10D and a KM (K2000) body. I also have a 55-300 zoom I use for wildlife photography.
In the last year I have got generally very good to great pictures of:
- Great Horned Owl(s)
- Barred Owl
- Northern Hawk Owl
- White Tail Deer (lots)
- River otter
- Fisher (1..a blur of speed)
- Wood Chucks
- Pileated Woodpeckers
- Ducks and Geese- all sorts of wild ones
- Bald Eagles
- Others to numerous to name
I go for walks in Boreal Forest , Canadian Shield, Prairie areas...mostly fall, winter and spring.
A lot of the areas I walk through are fairly bushy...lot's of branches which sometimes will defeat the automatic focus as the branches get in the way of me and subject.
No problem though, when going through the bush I set my K10D to manual focus. I also set the K10D to shutter preference and try to set the shutter speed to around 1/500th of a second or higher, which sometimes means I need to jack up the ISO to 400 - 800.
Other wildlife I've got are Buffalo, American White Pelican.
I find the K10D, KM combined with the 55-300 a great wildlife combo. Now I've found that fast moving birds in flight are sometimes difficult to capture....I need more shutter speed. I wonder about the new KX...has ISO that goes quite a bit past my K10D, which could give me faster usable shutter speed and I think, don't know the AF might be faster then my K10D.
On the Pentax digital SLR the 300 mm is the equivalent to about a 462 mm on a 35 mm SLR I believe.