Originally posted by LamyTax Sure, SDM is a pressing issue, too. With AF, there are a few things that need to be worked on before you adress the lens issues, though. No point in keeping a bug-free >two year old AF that's okay for mid range but nowhere near what the top range of the competition can do -- just to release reliable lenses. Especially considering that a lot of lenses do work just fine.
Have you ever tested the 5DIII's AF? Or "just" the 7D? Nikon's D4 can focus reliably at f/8.
SAFOX IXi+ AF-C is nowhere near that. Not in terms of speed, nor in terms of features.
Canon and Nikon also have some very slow lenses, especially the more affordable ones. Just think of the 100-400L for Canon.
The fact that almost every screw drive lens I own (and I own quite a few including non-Pentax lenses and FA ltds) and non-screw drive non-Pentax lenses (like Sigma HSM) out-perform the top of the line DA* lenses says a lot about the problem. A new body isn't going to fix this issue.
My guess is that the K5 replacement will no doubt have incremental improvements over the older bodies, but in my opinion, the DA* lenses (all SDM lenses, actually) are already further behind much of the competition than the body in terms of AF performance and they are keeping us from realizing the maximum potential of any body Pentax releases.
The DA* 16-50 and 50-135 lenses were released in 2007, soon to be 6 years ago, and it is a very hard sell to keep trying to convince buyers to pony up $1500 for a competitive top of the line semi-pro body (like the K5,of which I own 2) when the best semi-pro level zoom lenses Pentax offers are as slow as budget lenses from the competition or 20 year old screw-driven designs.
Let's see, since 2007 (top of the Pentax line only):
K10, K20, K7, K5, K-whatever is next
Same old slow and unreliable SDM technology.
A re-tool to replace SDM with something faster and more reliable is WAY overdue and had better follow hard upon the heels of a new body or anyone looking to upgrade is likely going to go somewhere else. Noobs looking at Pentax are going to be reading the same old complaints about not being able to track the toddlers and how Nikon is so much better.
I cannot count the number of threads, questions and complaints about Pentax AF(check the other forums), and there have been many defections related to AF as well (and yes, I know that the D7000 and other brands have problems too) but until the entire SYSTEM is re-tooled to be competitive in AF performance, Pentax/Ricoh will struggle to keep users and gain market share.
The bottom line is that after shooting Pentax since 1978 and owning all of the top of the line Pentax DSLRs and lenses, there is no doubt in my mind that the number one complaint about the brand is AF performance and the body is only one part of the problem. No other complaint even comes close.
If I were in charge at Ricoh, Pentax would have a all-hands effort to introduce a new body with improved AF at the same time as announcing a replacement for SDM, at least in the top of the line DA* products. Nothing else would matter until that issue was put to bed once and for all.
Ray