Z Coming soon. Hmmmm....

Started Apr 2, 2014 | Discussions
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waxwaine
waxwaine Contributing Member • Posts: 981
Re: Z Coming soon. Hmmmm....

"Zo", FF is what you want Pentaxians???...

paulkienitz
paulkienitz Veteran Member • Posts: 5,217
Re: So, it's not a full frame dslr?

VaLeX wrote:

It's sad, because my FF k-mount lenses won't work on the 645D

Or, will they? What's happening if I put my K mount 31mm Ltd on the 645D? The sensor will be cropped, but to what amount? How many megapixels will be used? Not to mention that you get a round image that you can crop as you wish: 4/3, 3/2 etc. Or keep it round

What a great idea for Pentax! To use the 645D as a full frame with ff-K mount lenses, via an adapter that makes auto-focus possible

How will you get the 31 Ltd into the 645's mount flange so it's at the correct registration distance?  With a hammer?

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VaLeX Senior Member • Posts: 1,067
Re: So, it's not a full frame dslr?

paulkienitz wrote:

How will you get the 31 Ltd into the 645's mount flange so it's at the correct registration distance? With a hammer?

Anything that works!
Anyway, I don't have a clear grasp on what's the registration distance and how this varies between K-mount and 645D mount. From what you say, I assume it's the distance between mount (or last element of lens?) and sensor? And the registration distance for 645 is bigger than that for k mount?

However, my commentary was not supposed to be taken seriously

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James O'Neill Veteran Member • Posts: 4,107
Re: So, it's not a full frame dslr?

VaLeX wrote:

paulkienitz wrote:

How will you get the 31 Ltd into the 645's mount flange so it's at the correct registration distance? With a hammer?

Anything that works!
Anyway, I don't have a clear grasp on what's the registration distance and how this varies between K-mount and 645D mount. From what you say, I assume it's the distance between mount (or last element of lens?) and sensor? And the registration distance for 645 is bigger than that for k mount?

It's the distance between the back of the lens (when focused at infinity) and the image. If you measure the distance between the image and lens mount on a K3 all the way back to the M an K series film cameras it's the same, but less than 6x7 and 645 cameras. So you can mount their lenses on a K mount camera with a spacer (with MF mount one side and K mount the other side).

To put a K mount lens on a 645 it would have to mount inside the body to focus at infinity (might work for close ups though).

ozdean
ozdean Forum Pro • Posts: 23,188
Re: Z Coming soon. Hmmmm....

In lieu of FF? New format so not a 645 MF.

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ozdean
ozdean Forum Pro • Posts: 23,188
Re: Z Coming soon. Hmmmm....

No maybe just the new 645d - no other intro for it on the site.

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Regards Dean - Capturing Creation
N.B. All my Images are Protected by Copyright

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Roland Karlsson Forum Pro • Posts: 25,046
Re: So, it's not a full frame dslr?

James O'Neill wrote:

VaLeX wrote:

paulkienitz wrote:

How will you get the 31 Ltd into the 645's mount flange so it's at the correct registration distance? With a hammer?

Anything that works!
Anyway, I don't have a clear grasp on what's the registration distance and how this varies between K-mount and 645D mount. From what you say, I assume it's the distance between mount (or last element of lens?) and sensor? And the registration distance for 645 is bigger than that for k mount?

It's the distance between the back of the lens (when focused at infinity) and the image. If you measure the distance between the image and lens mount on a K3 all the way back to the M an K series film cameras it's the same, but less than 6x7 and 645 cameras. So you can mount their lenses on a K mount camera with a spacer (with MF mount one side and K mount the other side).

To put a K mount lens on a 645 it would have to mount inside the body to focus at infinity (might work for close ups though).

The registration distance for K-mount is 45.46 mm, and for 645 it is 70.87 mm.

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solarider Veteran Member • Posts: 4,453
Re: So, it's not a full frame dslr?

With special adapter, 645 lenses can be mounted on K mount cameras, though AFAIK not the reverse.

VaLeX wrote:

It's sad, because my FF k-mount lenses won't work on the 645D

Or, will they? What's happening if I put my K mount 31mm Ltd on the 645D? The sensor will be cropped, but to what amount? How many megapixels will be used? Not to mention that you get a round image that you can crop as you wish: 4/3, 3/2 etc. Or keep it round

What a great idea for Pentax! To use the 645D as a full frame with ff-K mount lenses, via an adapter that makes auto-focus possible

solarider wrote:

What's so sad about much-fuller-than-so-called-35mm? 645 is a whole lot bigger than FF. Pentax 645 is over and well above any FF out there.

VaLeX wrote:

So sad!

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The intuitive mind is a sacred gift, the rational mind is a faithful servant.
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Comments, criticism, suggestions: it goes without saying!

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The intuitive mind is a sacred gift, the rational mind is a faithful servant.
We have created a society that honors the servant and has forgotten the gift. - Albert Einstein
________________
Science... became Scientism, which means it didn't just pursue its own truths, it aggressively denied that there were any other truths at all... Ken Wilbur
__________
Coincidence is God's way of remaining anonymous - Albert Einstein

samhain Senior Member • Posts: 1,162
Re: Z Coming soon. Hmmmm....

ozdean wrote:

No maybe just the new 645d - no other intro for it on the site.

It's a 645d with a cmos sensor.

samhain Senior Member • Posts: 1,162
Re: Z Coming soon. Hmmmm....

It would be pretty funny if they teased a fake FF model for April fools day

justin23 Veteran Member • Posts: 4,347
Re: Z Coming soon. Hmmmm....

samhain wrote:

It would be pretty funny if they teased a fake FF model for April fools day

That has been done for many years, several times people fell for it.

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