New Pentax 645D2014 also uses the 50MP Sony CMOS sensor!

derekkite · 02-13-2014, 08:00 PM

Red on the K3 is live view.

**filoxophy** · 02-13-2014, 09:12 PM

Originally posted by Roberts

No, there is not so much empty space in 645D behind the sensor. I don`t know about 645d II, but taking into account that 645DII has articulated screen, there is less space behind the sensor than in 645D.

Guess we're seeing the same thing and interpreting it differently. Most DSLRs have their rear LCDs crammed up against the back of the sensor.

noser · 02-13-2014, 09:23 PM

Originally posted by derekkite

Red on the K3 is live view.

Thx... I don't have a K3 so I wasn't sure how the modes work. I think I had in mind the red button from the K-01, which I heard was one-touch record or something.

It could very well be the 645D-ii would only be LV, if they recycle the K3 firmware (like the K7 > 645D).

It would still be nice for display on a large monitor in a studio situation though.

MadMathMind · 02-13-2014, 09:25 PM

Originally posted by tuco

Engineers over in metric countries must deal with the ambiguity all the time of what is mass for calculations vs weight/force when everything is called kilograms for both.

Only if the planet on which the object resides is unclear.

Otherwise, it is clear because kilograms are always mass. There's no ambiguity when you CALL kilograms "weight" because all the objects are assumed to reside on Earth, where the two quanities are simply related by a factor of 9.8. Every engineer who made it through his program would know kilograms are actually a unit of mass--they'd never pass a few core courses without knowing the difference between weight and mass!

I'd say the ambiguity is in the old USA. Most people don't even know the unit of mass (it's slugs, btw), since it is never used. When given some block on a spring problems (which need mass, not weight), many of my DE students--all future engineers--didn't realize they needed to divide pounds by 32 to get mass to make the problem work. They always equated pounds and kilograms as the same. If all they knew were kg, this wouldn't happen.

ElJamoquio · 02-13-2014, 09:47 PM

Originally posted by MadMathMind

kilograms are always mass.

...except when they aren't.

RonHendriks1966 · 02-13-2014, 10:05 PM

There is no video switch button!

**Digitalis** · 02-13-2014, 10:48 PM

After sitting here and comparing that image to my own 645D I noticed another thing: the AF point selector dial has been blanked as well. It is likely we will see a K3 style AF system used in the 645D as well, which will give the 645D MK II a boost in low light capability.

tuco · 02-13-2014, 11:01 PM

Originally posted by MadMathMind

Otherwise, it is clear because kilograms are always mass.

Yep. And the significance of the following escapes many: Weight = mass x gravity.

So find the mass of 1 kilogram-force of weight using that formula if weight and mass are equal.

Mass = 1 kilogram-force / 9.81 = 0.102

Oops it doesn't add up on more than one level. Need to convert kilograms (the weight) to something else or have some constant that makes the numbers numerically the same and get the units fixed.

In America we also have pounds-mass and pounds-force instead of the slug and the constant gee-sub-cee (gc) is the fudge factor that makes the units work out. In my field of engineering, the slug as mass is rarely used in computations.

mikemike · 02-14-2014, 07:12 AM

Originally posted by RonHendriks1966

There is no video switch button!

It has a standard issue "start recording" button.

D1N0 · 02-14-2014, 07:40 AM

Originally posted by mikemike

It has a standard issue "start recording" button.

I think he means there is no lever to switch between video and still, like on the K-3 where the video button doubles as liveview button in stills mode. So het red dot button is only for video. And liveview must be switched on differently I guess. Orrrrr the little bit of tape hides a LV sign and the AF selection controller has a video setting (since you would use Contrast detect AF in Video mode.

mikemike · 02-14-2014, 07:55 AM

It will be on that unlabeled dial behind the word 645D. It will have a still mode, 16:9 mode, and a 2.4:1 ratio. Framerate and resolution will still be menu driven though.

This is the ~~wild speculation~~ rumor section right.

jogiba · 02-14-2014, 12:19 PM

It looks like the delete/trash button.

Kunzite · 02-14-2014, 01:03 PM

Then the red dot and the microphone holes are there just to mislead us?

Zygonyx · 02-14-2014, 01:23 PM

ApparentIy nobody read or do believe in my first post here ....
it is clear for me that the "AF point" selector's indication have been erased because it will be the Video / Live view lever... and Ricoh decided to make up buzz about it....

nothemama · 02-14-2014, 01:31 PM

between the red dot and play buttons is a rectangular area that has been badly photoshopped. this is where the video rec icon will be.
red button is record.
as for video itself...
my guess is this camera will have the same internal processor as k3 with more buffer and will offer 1080p to sd card and pro res or RAW 4k to ssd or live hdmi out.

02-13-2014, 11:01 PM	#308
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,025	Originally posted by MadMathMind Otherwise, it is clear because kilograms are always mass. Yep. And the significance of the following escapes many: Weight = mass x gravity. So find the mass of 1 kilogram-force of weight using that formula if weight and mass are equal. Mass = 1 kilogram-force / 9.81 = 0.102 Oops it doesn't add up on more than one level. Need to convert kilograms (the weight) to something else or have some constant that makes the numbers numerically the same and get the units fixed. In America we also have pounds-mass and pounds-force instead of the slug and the constant gee-sub-cee (gc) is the fudge factor that makes the units work out. In my field of engineering, the slug as mass is rarely used in computations. Last edited by tuco; 02-13-2014 at 11:26 PM.

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02-13-2014, 08:00 PM	#301
derekkite Pentaxian Join Date: Sep 2011 Location: Nelson B.C. Posts: 3,782	Red on the K3 is live view.

02-13-2014, 09:12 PM	#302
filoxophy Site Supporter Join Date: Jul 2012 Location: Albuquerque Posts: 1,132	Originally posted by Roberts No, there is not so much empty space in 645D behind the sensor. I don`t know about 645d II, but taking into account that 645DII has articulated screen, there is less space behind the sensor than in 645D. Guess we're seeing the same thing and interpreting it differently. Most DSLRs have their rear LCDs crammed up against the back of the sensor.

02-13-2014, 09:23 PM	#303
noser Senior Member Join Date: Jan 2007 Location: Calgary, AB CA Photos: Gallery Posts: 292	Originally posted by derekkite Red on the K3 is live view. Thx... I don't have a K3 so I wasn't sure how the modes work. I think I had in mind the red button from the K-01, which I heard was one-touch record or something. It could very well be the 645D-ii would only be LV, if they recycle the K3 firmware (like the K7 > 645D). It would still be nice for display on a large monitor in a studio situation though.

02-13-2014, 09:25 PM	#304
MadMathMind Veteran Member Join Date: Dec 2013 Location: Houston, TX Photos: Gallery Posts: 1,717	Originally posted by tuco Engineers over in metric countries must deal with the ambiguity all the time of what is mass for calculations vs weight/force when everything is called kilograms for both. Only if the planet on which the object resides is unclear. Otherwise, it is clear because kilograms are always mass. There's no ambiguity when you CALL kilograms "weight" because all the objects are assumed to reside on Earth, where the two quanities are simply related by a factor of 9.8. Every engineer who made it through his program would know kilograms are actually a unit of mass--they'd never pass a few core courses without knowing the difference between weight and mass! I'd say the ambiguity is in the old USA. Most people don't even know the unit of mass (it's slugs, btw), since it is never used. When given some block on a spring problems (which need mass, not weight), many of my DE students--all future engineers--didn't realize they needed to divide pounds by 32 to get mass to make the problem work. They always equated pounds and kilograms as the same. If all they knew were kg, this wouldn't happen.

02-13-2014, 09:47 PM	#305
ElJamoquio Veteran Member Join Date: Feb 2011 Posts: 4,873 Original Poster	Originally posted by MadMathMind kilograms are always mass. ...except when they aren't.

02-13-2014, 10:05 PM	#306
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	There is no video switch button!

02-13-2014, 10:48 PM	#307
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	After sitting here and comparing that image to my own 645D I noticed another thing: the AF point selector dial has been blanked as well. It is likely we will see a K3 style AF system used in the 645D as well, which will give the 645D MK II a boost in low light capability.

02-14-2014, 07:12 AM	#309
mikemike Inactive Account Join Date: Apr 2010 Location: New Orleans Photos: Gallery Posts: 3,053	Originally posted by RonHendriks1966 There is no video switch button! It has a standard issue "start recording" button.

02-14-2014, 07:40 AM	#310
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	Originally posted by mikemike It has a standard issue "start recording" button. I think he means there is no lever to switch between video and still, like on the K-3 where the video button doubles as liveview button in stills mode. So het red dot button is only for video. And liveview must be switched on differently I guess. Orrrrr the little bit of tape hides a LV sign and the AF selection controller has a video setting (since you would use Contrast detect AF in Video mode.

02-14-2014, 07:55 AM	#311
mikemike Inactive Account Join Date: Apr 2010 Location: New Orleans Photos: Gallery Posts: 3,053	It will be on that unlabeled dial behind the word 645D. It will have a still mode, 16:9 mode, and a 2.4:1 ratio. Framerate and resolution will still be menu driven though. This is the ~~wild speculation~~ rumor section right.

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02-14-2014, 12:19 PM	#312
jogiba Banned Join Date: Sep 2006 Location: Millstone,NJ Posts: 6,491	It looks like the delete/trash button.

02-14-2014, 01:03 PM	#313
Kunzite Pentaxian Join Date: Apr 2007 Location: Romania Posts: 15,132	Then the red dot and the microphone holes are there just to mislead us?

02-14-2014, 01:23 PM	#314
Zygonyx Pentaxian Join Date: Jun 2011 Location: Ile de France Posts: 4,033	ApparentIy nobody read or do believe in my first post here .... it is clear for me that the "AF point" selector's indication have been erased because it will be the Video / Live view lever... and Ricoh decided to make up buzz about it....

02-14-2014, 01:31 PM	#315
nothemama New Member Join Date: Feb 2014 Posts: 1	between the red dot and play buttons is a rectangular area that has been badly photoshopped. this is where the video rec icon will be. red button is record. as for video itself... my guess is this camera will have the same internal processor as k3 with more buffer and will offer 1080p to sd card and pro res or RAW 4k to ssd or live hdmi out.