Originally posted by Anvh You're forgetting the new users like me who only or for the most part have DA lenses, it would mean that if i go to FF that i need to buy new lenses.
It's then very easy for me to go to Nikon or Canon and they offer a big range of FF lenses.
The same logic applies to present-day owners of other non-FF systems, though, or even those who swap FF systems. It's a consideration, obviously, but it's not necessarily a complete blocker.
Originally posted by Anvh Pentax need to start up a whole FF line with lenses so that will take at least 4 years before they have something respectable.
The only market Pentax have now directly available are the people who have a nice collection of Pentax film lenses.
How many of those will buy a FF dslr... 10% depending the price?
That's quite another matter, and what constitutes "respectable" depends on the market needs. Growing a new system does happen elsewhere, too, and you'd have to expect it would be a limitation. This one has been argued out elsewhere ad infinitum.
Originally posted by Anvh I doubt the FF market will be profitable for them and if they come to the same conclusion they won't make a FF since it's a company and they need to make a profit.
Of course, that may be what happens, too. However, I would expect that Ricoh's deeper pockets means that they have a better chance of turning a low margin market entry (or even an initial loss leader) into a profitable line as the business grows. Again, this scenario has been argued over here, many times.
None of this necessarily makes it "too late" for Pentax, but there's no denying they are late to enter this part of the market. Considering the early setback with the MZ-D, they did well to come back with the *istD, but they adopted a single-product strategy for too long after that, and I believe that era put them behind the 8-ball. Nonetheless, they have evolved in the APS-C segment with strong products that put them in good stead for further expansion. Growing a new sensor line will take time, undeniably, but it isn't an impossible task, just a Herculean one.