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09-10-2014, 07:00 AM   #46
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The constraints on medium format lens speeds are by and large a function of the size of glass and/or number of elements needed to make such a lens, and in leaf shutter lenses, with the additional girth of a leaf shutter that will handle full diameter of the light cone when fully retracted added on top of that.

On the Q, the added bulk, of any, necessitated by such a shutter would be trivial. On a 645, it's a whole different story.

As far as the OLY goes, the considerations are somewhat different, since on a fixed lens camera, the leaf shutter can be integrated into the camera body, whereas on an ILC like the 645, the entire mechanism typically has to be built into the lens, unless you build it into the body as the main shutter as in the Topcon mentioned above by gazonk, or as in the later DKL Kodak Retinas, which also integrated the aperture control ring into the camera body as well. Of course such an approach is out of the question at least for this generation of the 645!


QuoteOriginally posted by lytrytyr Quote
With a leaf shutter?

---------- Post added 09-10-14 at 08:54 AM ----------



My Olympus 35SP ("full frame") had an f/1.7 lens with a leaf shutter.



Last edited by dcshooter; 09-10-2014 at 07:14 AM.
09-10-2014, 07:08 AM   #47
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QuoteOriginally posted by gazonk Quote
My first SLR, acquired at the age of 14, had a leaf shutter behind the lens mount


There's got to be some major disadvantage right? Why don't they make SLRs with leaf shutters? Strobists would sure dig it.
09-10-2014, 07:13 AM   #48
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Focal plane shutters have a higher top speed (without strobe, obviously), and in my experience generally require less service over time. Since they are the full size of the film/sensor frame, they also mitigate the constraint that a round leaf shutter can put on maximum aperture.

QuoteOriginally posted by konraDarnok Quote
There's got to be some major disadvantage right? Why don't they make SLRs with leaf shutters? Strobists would sure dig it.
09-10-2014, 07:29 AM   #49
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QuoteOriginally posted by konraDarnok Quote
There's got to be some major disadvantage right? Why don't they make SLRs with leaf shutters? Strobists would sure dig it.
Well, one disadvantage for sure was that the fastest shutter time was 1/500, and I guess the placement of the shutter in front of the mirror box put some restrictions on lens designs (I only owned a 50mm f/2 for it).

09-10-2014, 07:34 AM - 1 Like   #50
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QuoteOriginally posted by dcshooter Quote
(...) on a fixed lens camera, the leaf shutter can be integrated into the camera body, whereas on an ILC like the 645, the entire mechanism typically has to be built into the lens, unless you build it into the body as the main shutter as in the Topcon mentioned above by gazonk, or as in the later DKL Kodak Retinas, which also integrated the aperture control ring into the camera body as well. (...)
Yo can add Pentax Auto 110 to your list .
09-10-2014, 11:10 AM   #51
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I don't really beleaf this rumour, but I might be wrong.
09-10-2014, 02:50 PM   #52
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Well, all my 4x5 lenses have such shutters.
I don't understand why there'd be anything hard to believe in this.
Pentax DID have a couple leaf shutters lenses, why wouldn't they have modern ones?
09-10-2014, 03:11 PM   #53
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QuoteOriginally posted by Uluru Quote
I am more amazed that if this is true, will more likely lead to revamp of the (entire?) 645 lens series, in order of depletion of the old stock. So when an old lens is gone, a new one but with a leaf shutter will jump in?
Which is unbelievable, considering that it is ok to redesign 645 lenses, and semi-publicly announce it, but not ok to finally introduce a pair of kit lenses for the K-mount with a decent motor? I wonder how many billions of screw drive 18-55 they have produced they can't exhaust the stock?
I don't follow this reasoning. If the 645z is designed to support both in-camera focal plane shutters and in-lens leaf shutters, then why is there a need to redesign or revamp anything? Maybe this represents just one or two new special purpose lenses.

The traditional Pentax 645 lenses will still work and be well suited for many situations, while people who want or need the characteristics of leaf shutters will have a couple of new options. That's good!

09-10-2014, 03:14 PM   #54
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QuoteOriginally posted by Quicksand Quote
I don't follow this reasoning. If the 645z is designed to support both in-camera focal plane shutters and in-lens leaf shutters, then why is there a need to redesign or revamp anything? Maybe this represents just one or two new special purpose lenses.

The traditional Pentax 645 lenses will still work and be well suited for many situations, while people who want or need the characteristics of leaf shutters will have a couple of new options. That's good!
That's not good, Uluru said so. Can't you get this?
09-10-2014, 03:29 PM   #55
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No yeah, you're right. Those leaf shutter guys were probably pulled off the FF project and the motorized kit lens project. Probably the electronic aperture control project too, and the free pizza for everyone project. Dang.
09-10-2014, 03:42 PM   #56
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No! Not the free pizza for everyone project! Tell me it isn't true!
09-10-2014, 04:19 PM   #57
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To be fair, the leaf shutter team didn't poach ALL of the free pizza team. The rest of them were pulled away by the body color combination team.
09-11-2014, 02:14 AM   #58
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Do you think that supposedly rumoured not existing lens is a JK manufactured rebranded to Pentax.
I can feel it. So wrong, so wrong.


xD
09-11-2014, 07:04 AM   #59
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Interesting conundrum.

MR himself states in the LL forum for MF that this is simply a rumor.
09-11-2014, 07:24 AM   #60
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How to create free buzz for your website... and/or to loose any credibility for the future...

Last edited by Zygonyx; 09-11-2014 at 12:18 PM.
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