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Forum: Pentax K-1 & K-1 II
01-21-2019, 11:58 AM
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For me, pixel shift is fun to try but never made any meaningful difference vs single exposure. There's more value into Astrotracer and 36Mp FF for under 2K. Dynamic pixel shift is more value for me, because I remember traveling and wanting to photograph some architectural thing at dusk and lack of tripod was a problem; with DPS I could have bumped ISO and get away with a good picture. And since this is a thread about the K1 II, I'm happy that the K1 II is free of shutter shock, for me that's a great improvement (I don't know if the improvement came from a firmware change , like a slight delay between mirror/shutter or something fixed on the K1 II shutter mechanism).
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Forum: Pentax K-1 & K-1 II
01-21-2019, 11:07 AM
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For all in focus landscape, I defined my own rule of thumb for aperture settings on the K1, and in that case, FL longer than about 35mm do not benefit of pixel shift. Obviously are other cases such as photographing of a flat surface such as a painting, or photographing objects with a lots of blurred background.
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Forum: Pentax K-1 & K-1 II
01-21-2019, 12:02 AM
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K1 II users have to be aware of the purpose of single exposure, pixel shift and dynamic pixel shift:
- some parts of the image I see in the viewfinder may move within 1 seconds (2x4x1/4th) or more: I use single exposure mode
- what I see in the viewfinder doesn't move during at least 1 sec. or total exposure time, I have a tripod with me: I use pixel shift
- what I see in the viewfinder doesn't move during at least 1 sec. or total exposure time, I don't have a tripod with me and the scene doesn't require fine tone curve correction: I use dynamic pixel shift
I've seen Sony A6K in camera stacking more for low light shooting without tripod: ISO is set high enough not to induce image blur, multiples noisy frames are captured and then stacked to reduce the noise.
The K-1 II does a better job by stacking images but also eventually using slightly displaced frames as oversampling technique also having the potential to render a little more detail depending on lens sharpness and aperture, so it works best at medium high ISO. And generally, pixel shift or dynamic pixel shift won't render more details at aperture f8 and smaller due to diffraction, only noise will be reduced.
Typical case where PS or DPS bring better image quality: wide angle lens , 20mm , aperture f4.
Beyond 35mm FL [for landscapes type of shots], for all in focus frame, PS or DPS won't bring more sharpness.
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Forum: Pentax K-1 & K-1 II
01-18-2019, 12:24 PM
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The question become irrelevant when there is no shutter shock.
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Forum: Pentax K-1 & K-1 II
01-18-2019, 10:29 AM
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With my copy of the Pentax K-1 Mk II, I don't have the shutter shock issue at any shutter speed, I'm afraid I can't confirm your experience.
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Forum: Pentax K-1 & K-1 II
01-17-2019, 04:58 PM
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You didn't use 50kg rig when you stacked your shots. So your conclusion that shutter shock is the root cause of stack blur is invalid. K1 pixel size is 4.85um, you have to prove that the camera didn't move by more than 0.01um between frames of the stack, if you can prove that, I accept your conclusion that stack blur comes from shutter shock. If you used a 50kg tripod, was there any seismic activity from the deep ground in your area when you recording image frames? was the atmospheric air moving causing slight displacement of the tripod? How long was the capture of all the frames used in the stack?
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Forum: Pentax K-1 & K-1 II
01-17-2019, 12:56 PM
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Well, I haven't bought the K1 II for showing others the difference in 800x600 pixels images. I bought the K1 II for myself. First impression is good. Ideally I would post comparisons, although I'm starting to fatigue with online stuff. Time to log out and go outdoor for some time.
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Forum: Pentax K-1 & K-1 II
01-17-2019, 11:11 AM
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What I'm referring above is an increase of image rendering when looking at the entire image (no pixel peeping). Loss of sharpness of K1 II over K1 is a lab thing, I don't see it practically when shooting hand held.
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Forum: Pentax K-1 & K-1 II
01-17-2019, 07:27 AM
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From what I can see with the copy of K1 and K1II I have, the images I get with the K1 Mk II are like the K-1 image but a bit better: more microconstrast, less noise. And the K1 mk II is a bit faster to operate compared to K1 for some of image processing options such as skin tones and clarity.
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Forum: Pentax K-1 & K-1 II
01-17-2019, 06:58 AM
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Received a K-1 II today, performed some quick tests to check that the camera is working fine. I can also say that it's very refined camera. The images render even better than the K-1, no issue with shutter shock (as opposed to what I can see on my K-1). And hand held pixel shift works great, images are gorgeous. What I can see if more like that Ricoh said when they released the Pentax K-1 II, and I don't see the negative things related to criticism of the reviews and all the fuzz reported here. To me the K-1 II, as far as my experience with it, is a very fine camera, I'm very happy with this new purchase.
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Forum: Pentax K-1 & K-1 II
01-15-2019, 05:30 AM
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Bad mouth here. Stacking multiexposure without alignement between frame abviously will cause blur because of any slight displacement of the camera or sensor between each frame. Stacking frames without alignment isn't a measure of shutter shock impact at all. I really don't like your incorrect statement above.
---------- Post added 15-01-19 at 13:32 ----------
Yes, you are correct.
---------- Post added 15-01-19 at 13:47 ----------
For the time being, mirrorless models to the level of the Pentax K1 , are more expensive, and those mirrorless models bring no advantage for still photography, those MILC even have issues nicely put under the carpet by promoters of mirrorless. Currently, mechanical shutters of MILC cameras are usually lower quality compared to what's designed in DSLR, eventually produce more shutter shock do to light weight MILC bodies, and because the idea of MILC is to rely primarily on electronic shutter feature of the image sensor in order to simplify shutter actuation. The downside of electronic shutter and even EFCS is that it create some amount of distorsion on moving subjects, the Sony A9 partially addresses that, but not the other models. When using full mechanical shutter on the MILC camera, even the best models, generate more shutter shock that DSLRS. Evidence is the sharpness of the Nikon Z7 (brand new model) using mechanical shutter compared to the D850 with the same settings: reviewers have reported better sharpness with the D850, and test shots have shown the the Z7 suffer of a significant shutter shock when using its mechanical shutter. But obviously, promoters of mirrorless will nicely forget to refer to those issues, because mirrorless is the new thing to general business by making people switch from DSLR and renew their lenses as well.
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