Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-23-2009, 09:02 PM   #1
Veteran Member
mattdm's Avatar

Join Date: Feb 2007
Location: Boston, MA
Photos: Gallery
Posts: 2,964
new roadmap update (645 Digital)

Interchangeable Lenses : Digital Cameras : Imaging Systems Division : PENTAX

I know it was too much to hope to see the DA★ 30mm back on the list. Oh well. Instead, there's an un-detailed 645 ultra-wide, plus a 55mm f/2.8 (which presumably will be the normal lens?).

Meanwhile, the DA★ 60-250 f/4 is still "Spring 2009" good luck with that. And there's still the vague "DA Super Telephoto".

03-23-2009, 09:08 PM   #2
Veteran Member




Join Date: Feb 2008
Location: Toronto
Posts: 3,915
so what this is saying that we can expect at most 2 new 35mm lenses (60-250 and Super Tele) between now and the 645D launch in 2010
03-24-2009, 12:42 AM   #3
Veteran Member
Steelski's Avatar

Join Date: Jan 2008
Location: Varna
Posts: 468
Not really, How long did it take for them to get the 15mm limited to market?
they announced it not too long ago and it was available fairly quickly.
03-24-2009, 12:46 AM   #4
Veteran Member
RawheaD's Avatar

Join Date: Dec 2008
Location: MA, USA
Photos: Gallery
Posts: 831
OK, so I know next to nothing about MF, but isn't 80mm considered the "normal" lens? I.e., an FOV equivalent of 50mm lens on FF/135 camera bodies?


If this 55/2,8 is going to be the "normal" lens, as opposed to a wide-angle (that's what, e.g., CZJ Flektogon 50, CZ Distagon 50, etc., are considered, no?), does that mean this is going to be like a "cropped" medium format? Kind of like what APS-C is to FF?


In which case, I must ask, what's the effin point?

03-24-2009, 12:55 AM   #5
Veteran Member




Join Date: Jan 2009
Location: Gnesta, Sweden
Posts: 373
Still this is good news...showing that pentax continue develope things while the market is like today...

I think it is a brave move.

More lenses to come surely!
03-24-2009, 01:39 AM   #6
Pentaxian
thibs's Avatar

Join Date: Jun 2007
Location: Belgium
Photos: Albums
Posts: 5,267
QuoteOriginally posted by RawheaD Quote
OK, so I know next to nothing about MF, but isn't 80mm considered the "normal" lens? I.e., an FOV equivalent of 50mm lens on FF/135 camera bodies?


If this 55/2,8 is going to be the "normal" lens, as opposed to a wide-angle (that's what, e.g., CZJ Flektogon 50, CZ Distagon 50, etc., are considered, no?), does that mean this is going to be like a "cropped" medium format? Kind of like what APS-C is to FF?


In which case, I must ask, what's the effin point?
Yes it is cropped, it has always been but it still is way bigger than FF.
BTW, all other competitors (Mamiya & co) are cropped as well.
I think it is around 1.3x from base 645 area.
03-24-2009, 04:12 AM   #7
Veteran Member
falconeye's Avatar

Join Date: Jan 2008
Location: Munich, Alps, Germany
Photos: Gallery
Posts: 6,863
QuoteOriginally posted by losecontrol Quote
Still this is good news...showing that pentax continue develope things while the market is like today...
Actually, it means that the people having a heart for the 645D project are still on board -- and never gave up...
03-24-2009, 09:55 AM   #8
Veteran Member
RawheaD's Avatar

Join Date: Dec 2008
Location: MA, USA
Photos: Gallery
Posts: 831
QuoteOriginally posted by thibs Quote
Yes it is cropped, it has always been but it still is way bigger than FF.
BTW, all other competitors (Mamiya & co) are cropped as well.
I think it is around 1.3x from base 645 area.

Ah. OK. So let's see, if I remember correctly, 135 is about a 1.5x crop of 645? So I guess this 645D is more like the "APS-H" of MF?


I guess that means something. God knows I'd happily take an APS-H K30D :-)

03-24-2009, 10:07 AM   #9
Pentaxian
thibs's Avatar

Join Date: Jun 2007
Location: Belgium
Photos: Albums
Posts: 5,267
QuoteOriginally posted by RawheaD Quote
Ah. OK. So let's see, if I remember correctly, 135 is about a 1.5x crop of 645? So I guess this 645D is more like the "APS-H" of MF?


I guess that means something. God knows I'd happily take an APS-H K30D :-)
Not quite... 24x36 has a diagonal of 4,33 centimeters.
Cropped 645 would be 5,4 centimeters.

In terms of surface (considering probable 45x30 sensor):

645D: 13,5 square centimeters
24x36: 8,4 square centimeters

Quite a difference, quite a number of pixels you can squeeze there

REmember that you multiply dimensions when calculating surface. It is almost two times as much area as FF 24x36 sensor.
03-24-2009, 02:26 PM   #10
Veteran Member
GoldenWreckedAngle's Avatar

Join Date: May 2008
Location: Abilene, TX
Posts: 341
I grow weary of maps - Show me a road.
03-25-2009, 12:41 AM   #11
Forum Member




Join Date: May 2008
Location: Madison WI U.S.A.
Posts: 60
645 film is 41.5 x 56
135 film is 24 x 36

The standard DMF has been 36 x 48, though one of the newer backs (I forget which one) is 41.5 x 56, and I think the new leica is 30 x 45. In case you're wondering 36 x 48 is twice the area of 135. It would be very unlikely that Pentax would move away from the 3/4 ratio of standard 645.

In my film days I shot Mamiya 645 and a 55mm lens was the equivalent of 34mm on 135. I'm not sure what the equivalent for a 55mm would be on a 36 x 48. Perhaps someone can figure out the ratio with the above numbers.
03-25-2009, 02:50 AM   #12
Senior Member




Join Date: Jun 2007
Location: London, UK
Photos: Gallery
Posts: 214
QuoteOriginally posted by GoldenWreckedAngle Quote
I grow weary of maps - Show me a road.
Well played, sir! That said, the super-telephoto might be interesting
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
pentax news, pentax rumors
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Digital back for Pentax 645 ? sir_bazz Pentax Medium Format 11 01-18-2011 02:54 PM
60MP 645 digital back... MrApollinax Pentax DSLR Discussion 8 07-15-2008 11:05 PM
Upcoming DA*, DA Ltd. Macro, Digital 645 tux08902 Pentax News and Rumors 26 01-24-2008 07:22 AM
Picture of the new 645 Digital TankSlapper Pentax DSLR Discussion 8 02-22-2007 01:11 PM
Pentax 645 Digital Announced! Adam Pentax News and Rumors 24 02-14-2007 05:42 AM



All times are GMT -7. The time now is 03:47 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top