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Forum: Pentax News and Rumors
04-30-2019, 05:49 AM
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That settles it! I'm predicting the introduction of an HD Pentax-D FA* 85mm F2.8 Soft LS with both defocus control and leaf shutter!
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Forum: Pentax News and Rumors
04-29-2019, 10:19 AM
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Great info, thanks.
Also confirms -- Pentax should make a portrait lens with a leaf shutter! :D
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Forum: Pentax News and Rumors
04-29-2019, 05:45 AM
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Not to abandon my love of the leaf shutter ... but I was perplexed that the lowly Nikon D70 used a hybrid shutter with mechanical first curtain and electronic final curtain shutter. It had an official flash sync speed of 1/500 and with manual flashes could sync up to 1/8000.
Not sure why this is no longer possible? Presumably the move from CCD to CMOS prevented using a hybrid shutter like this?
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Forum: Pentax News and Rumors
04-26-2019, 06:25 AM
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You understand that offering leaf shutters inside one or two lenses does not mean getting rid of the focal plane shutter inside the camera right?
You can investigate how LS lenses work on the Pentax 67s to see this in action. The 67 lineup included 90mm and 165mm leaf shutter lenses. Some folks are even using them on the 645D/Z.
All that has to happen for leaf shutters to work on focal plane SLRs is:
-- the camera fires the focal plane shutter at a speed that is slower than the leaf shutter and slow enough to expose the whole frame at once (i.e. the trailing curtain doesn't start moving before the first curtain has completely opened.)
-- the lens receives a trigger from the camera to fire the leaf shutter.
Given the current state of electronic communication between camera body and lens, this whole process could be completely seamless and invisible to most users. If you mounted a theoretical modern leaf shutter lens, the camera would automatically set the appropriate focal plane shutter speed (i.e. 1/8 second) and communicate the correct shutter speed to the lens (between Bulb and 1/500 or 1/1000.) If a shutter speed above 1/500 were selected (by the user or by the Program mode) the camera could simply leave the lens-based shutter open and use the camera's focal plane shutter.
This is the kind of photographer-friendly feature that Pentax is already known for (like weather sealing, IBIS, the 645D/Z line). Does everybody need this? No. But for some photographers (fixated either on absolute sharpness without shutter shock, or on achieving best-in-class flash sync speeds for portraits) having a leaf shutter lens available in the lineup could be a deciding factor to invest in a Pentax K-1 iii.
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Forum: Pentax News and Rumors
04-25-2019, 07:56 AM
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xandos and Rondec,
Lower ISOs are provided by attenuating the output in some manner.
Nikon D750: ISO range 100-12800, expandable to 50-51200
Nikon D800: ISO range 100-6400, expandable to 50-25600
Canon 5D Mk IV: ISO range 100-32000, expandable to 50-102400
Results from these "Low" or 50 ISO settings look great and provide flexibility if you need to lose a stop without using an ND filter.
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Forum: Pentax News and Rumors
04-25-2019, 06:41 AM
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LOL, amazingly I shoot daylight fill-flash all the time at ISO 160 (Portra) and with leaf shutters that top out at 1/500 (Bronica.)
Having lower ISOs makes daylight fill easier and more flexible, especially to get large apertures and shallow DOF. The Pentax K-1 already goes lower than Portra (ISO 100) and it would be trivial for Pentax to add ISO 50 to a Pentax K-1 iii.
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Forum: Pentax News and Rumors
04-24-2019, 06:22 PM
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The other reason I love leaf shutters is having universal flash sync (with real, full power flash.) That makes daylight flash photography into a very useful and creative option, especially for portraits.
I would love to see a full-frame K-mount 85mm with leaf shutter — in exactly the same way that one or two leaf shutter lenses were available for the Pentax 67. With electronic lens control, it’s definitely achievable. That would make the K1ii/iii an irresistible portrait machine.
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Forum: Pentax News and Rumors
04-24-2019, 09:41 AM
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Shutter shock is just part of process, since the invention of the focal plane shutter. You can't throw mass in one direction without generating force in the other. Camera makers can make the problem worse by having camera bodies without adequate mass (for damping) or having a body that seems to ring at a resonant frequency to the shutter.
I'm sure in the vast majority of photographs it makes little difference. But it is one reason I enjoy shooting medium format with leaf-shutter cameras. Regardless of shutter speed, the leaf shutter in a Bronica, or Rollei, or Fuji GW, has no impact on resolving details. I loved my Pentax 67 but went back to Bronica because of the shutter type.
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