Originally posted by y0chang The reason why there are no 645 1.4 primes nor 2.8 zooms is that the cost and size would be enormous because the elements would have to be enormous to cover the image frame of MF. The whole point of 1.4 and 1.2 lenses was to imitate that medium format look with a 35mm camera...well you don't have to imitate when you are actually using MF...
I know. It was a rhetorical question to stevebrot that said the reason to buy 645 was "Better S/N ratio and DOF (you know the usual stuff)." Actually you
don't get better DOF and S/N ratio on 645 because it doesn't have as large apertures available as FF will get. 645 also lacks shake reduction. So in my opinion the FF offering will have key advantages over 645. On the other side 645 will offer a different package with better resolution as the main selling point. Even f/1,4 lenses stopped down to f/2 cant resolve as much as the 645 on f/2,8. Or at resolution optimal apertures for that matter.
---------- Post added 06-27-2015 at 07:19 PM ----------
Quote: #1. Ricoh is going to open a factory service center in the US in 2016.
#2. The new full frame Pentax will have the Sony 42 MP sensor from the a7R II.
#3. Tamron will be adding new Pentax K mount lenses because of the above.
Originally posted by Pål Jensen I seriously doubt a Tamron rep knows anything about a Pentax FF apart from what he reads on this forum...
I think #1 and #2 is good guesses, but #3 might hold some genuine Tamron knowledge.