On Wed, Mar 10, 2010 at 3:48 AM, Cotty <[email protected]> wrote: > On 9/3/10, jtainter, discombobulated, unleashed: > >>http://www.dpreview.com/news/1003/10031002pentax645d.asp > > One thing confuses me. It's a 645D - yet the sensor size means that it's > really a 433D or thereabouts. So existing 645 lenses will be crippled by > the same 1.5x crop factor that the K-7 and it's earlier siblings have? > > So a serious landscape photographer who had what once was a fabulous > wide angle on his film Pentax 645 will now have a fabulous not-so-wide > and have to buy an even wider lens to compensate if he/she wants more of > the same? > > Sure, things open up in the telephoto end, but for 'MF' digital, surely > the wider end is more important? > > -- > > > Cheers, > Cotty
It's a 1.3x crop factor, pretty much standard for MF Digital. There's only one 645 Full-frame sensor on the market, the 60MP sensor in the PhaseOne P65+ back and the last I'd heard that was a custom job for PhaseOne and not available to other vendors, even if it was, it would probably have doubled the cost of the 645D. Everyone else except Leica is using either 1.3x or 1.1x crop sensors, depending on availability and cost (every back maker switches between the two sizes). Leica is using their own, slightly smaller 3:2 aspect format. Given that the 645D-FA lenses remain able to cover 645, I expect Pentax to move up to full-frame sensors when there are economic options available. I'd expect Pentax to launch a 28mm lens for the 645 if body sales are robust. -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
