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02-13-2014, 09:11 AM   #286
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Are there any cine lenses for 645 format out there?

02-13-2014, 09:11 AM   #287
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doesn't matter as much about the card write speed, there's two ways around that..
1) have it record to memory card in 1080 p, BUT have 4k hdmi out so film makers can record to external recorders
or
2) have a HUGE internal buffer or ssd drive.

The 645d would have a lot of extra space inside to accommodate an extra battery and an ssd drive...
02-13-2014, 09:39 AM   #288
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QuoteOriginally posted by mikemike Quote
Even with 64 GB, how quickly will that card fill up?

Better have dual or quad card and make them hot swappable.
Get a 256GB SDXC card.

Lexar 256GB SDXC Memory Card Professional Class LSD256CTBNA600
02-13-2014, 09:47 AM   #289
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Damn! The mic/speaker holes always pointed towards video, but I'm still having trouble believing it! There is definitely tape in that image, covering up whatever symbol applies to the Play button. Also, the AF point selection dial is unlabeled...seems strange that they would move that function elsewhere. Who knows. Ricoh sure knows how to string us along!

Edit...

Now I see that AF point selection is performed a la the K-3--press the button with the 4 arrows on it, then use the 4-way controller. So that could free up the old AF point dial for a stills/video switch. Still leaves the mystery of the taped-off label...

02-13-2014, 10:37 AM   #290
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The sensor plane on this is really far foward compared to pentax's normal APS-C cameras. Was the original 645D that way too?
02-13-2014, 11:07 AM   #291
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QuoteOriginally posted by mikemike Quote
The sensor plane on this is really far foward compared to pentax's normal APS-C cameras. Was the original 645D that way too?
Yes. A cutaway view reveals a lot of empty space in there. A result of keeping the form factor of the old 645 with its film inserts.
02-13-2014, 12:48 PM   #292
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QuoteOriginally posted by filoxophy Quote
Yes. A cutaway view reveals a lot of empty space in there. A result of keeping the form factor of the old 645 with its film inserts.
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.


Last edited by Roberts; 02-13-2014 at 01:02 PM.
02-13-2014, 03:53 PM   #293
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A mirrorless MF camera with the right flange distance could allow FF lenses to be used in Crop Mode for a FF experience and this would allow a transition to MF, over time, for people with legacy glass. If it's good enough for Sony and Leica to develop adapters then I don't see why Pentax should limit themselves.

02-13-2014, 04:23 PM   #294
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QuoteOriginally posted by bossa Quote
A mirrorless MF camera with the right flange distance could allow FF lenses to be used in Crop Mode for a FF experience and this would allow a transition to MF, over time, for people with legacy glass. If it's good enough for Sony and Leica to develop adapters then I don't see why Pentax should limit themselves.
Yawn. SSDC.

It isn't the mount or the camera that matters. It is the lenses. Adapting FF lenses misses the point. You have to mount 645 lenses. So how is the MIL 645D Camera any smaller once the adapter is mounted?
02-13-2014, 04:24 PM   #295
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I'm not at all an optics specialist, but wouldn't a short flange difference on an MF system require quite specialized lenses to cover the sensor area? The image circle has to widen after the last element, and the longer the distance the more dramatic the angles would need to be.

Does this show up at all on native A7 lenses from Sony?
02-13-2014, 04:37 PM   #296
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QuoteOriginally posted by interested_observer Quote
As, I understand - there is a basic architectural difference between Canon, Nikon and Pentax in terms of the image processing hardware. Canon's image processing chip allows for multiple parallel processing paths, while Nikon/Pentax's do not. Both Canon and Pentax use variations of the Fujitsu Milbeaut, while Canon uses a version of Texas Instruments OMAP. Unlike Fujitsu Milbeaut, Digic (Texas Instruments OMAP.) supports multi-processor configurations and can also execute external programs. The ability to support and execute external programs enables the Canon's ability to have third party capabilities like CHDK.

Thanks for the information, Ricoh/Pentax might have to to alter the architecture to allow for a degree of SIMD parallelism or even task sharing across two cores on the same die.The storage and computational requirements for 4K video are substantial. It would be very interesting, (however unlikely) if Ricoh could get someone like NVIDIA or AMD to produce a processing chip with sufficient capabilities to handle 4K video and data storage in a single platform.
02-13-2014, 04:51 PM   #297
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QuoteOriginally posted by derekkite Quote
I'm not at all an optics specialist, but wouldn't a short flange difference on an MF system require quite specialized lenses to cover the sensor area? The image circle has to widen after the last element, and the longer the distance the more dramatic the angles would need to be.

Does this show up at all on native A7 lenses from Sony?

If that is the limiting factor then the lens designers can add a 'hollow tube' to the end of the lenses in order to maintain focal length. Long focal length lenses are already designed this way.

A short registration distance allows easier design of wide angle lenses.

In the extreme case the image circle doesn't widen after the last element - this is the definition of telecentricity. In theory this is required by the M4/3rds standard (which requires telecentric lenses).
02-13-2014, 04:56 PM   #298
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Do we know

Do we know when there will be some official information?
02-13-2014, 04:59 PM   #299
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02-13-2014, 07:05 PM   #300
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QuoteOriginally posted by Digitalis Quote
Recent images have revealed that the 645D might have video/ live view - if this is the case than be prepared for a frenzy of cinematographers. Especially when one takes into account that there is no similarly priced alternative for MF video from either RED or black magic.
Hey, what's that red button for? "Record" ?
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