Originally posted by normhead With them about to release a new 70-200 with an image circle big enough for in body image stabilization in an FF, you could be wrong. As far as I know, there is nothing like the FA*250-600 in Canikon land to this day, so I guess it depends on your perspective.
Norm, your response is indicative of why Pentax is a weak solution for the sports and wildlife shooting market.
-The fabled 70-200 is not a real product being sold. What was shown at Photokina was a prop: a real looking lens case sealed under glass with a vague caption. Probably had a couple of mason jars inside.
Comparing a prop to say the Canon 70-200mm f2.8 II IS, which is considered the best zoom ever made, is, well both an act of faith in Ricoh, and just silly string.
Both Sigma and Tamron have discontinued their 70-200mm f2.8 offerings in K-mount. That doesn't send a particularly strong message of confidence to potential brand changers.
-RE: the 250-600mm, sheesh, this hasn't been made in over 20 years. While nostalgia for the glory days of Pentax is a fun exercise, it doesn't help get actual new and modern functioning product into shooters' hands.
To answer your question, well both the Tamron 150-600mm (which I own) and the forthcoming Sigma 150-600mm in two versions (which are offered for pre-order on retail sites) encompass that focal range quite well. Having used the FA 250-600mm I'll say that the optics are good, but at 12 pounds it's a tripod only affair which limits real-life sports and BIF use.I've handheld the Tamron for 90 minutes of soccer and over a 4 mile birdwatching hike. Also, power-zoom is a charming concept from 20 years ago that simply cannot keep up with active sports, BIF and modern predictive AF systems.
Instead of a heavy, storied and very expensive relic from that past, I think most Pentax shooters would be better served by simply having access to a modern 400mm affordable prime and a superzoom in the 100-400mm range. That may also make the brand more attractive to "defectors."
M