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Forum: Troubleshooting and Beginner Help
04-16-2021, 06:58 AM
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ProPhoto is designed to be a working profile; it's actually physically impossible for an RGB monitor to span it because it uses imaginary primary RGB values. Keeping your output profile sRGB is the best way to make sure your photos stay relatively consistent across platforms.
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Forum: Pentax KP
04-14-2021, 02:07 PM
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There is nothing unique about this phenomenon to the KP or any subset of Pentax DSLRs. The presence of a color filter array and the way that cameras and demosaicing algorithms try to mimic human photopic vision have some significance regarding the prevalence of magenta in these scenarios where every color channel is beginning to fully saturate, but the flare is first and foremost an optical phenomenon that will affect the imaging plane regardless.
The only thing noteworthy about the K-5 line in this context is that their photosites individually have a very high well capacity. Only the 645 DSLRs have more. They are harder to saturate to the point of the intense magenta or completely clipped white, but with overexposure it can be easily mimicked. Likewise, underexpose in the presence of high contrast/backlighting and you will avoid the intense magenta saturation, though in some scenarios a camera may not have the dynamic range for it to be feasible in one exposure.
As for Fuji: the magenta flare is no more specific to them than any camera that uses a filter array. There is an additional phenomenon where coarse(r) grid-like patterns may show in flares due to the arrangement of the X-Trans array, presumably a solvable (if not already solved) problem with changes in demosaicing logic.
They absolutely flare; it is just harder to achieve. See attached images with the HD D FA 28-105 wide open @ 28mm on the K-1. I literally just went outside and shot the sun through a tree. Today is cloudy where I am so this is even more diffuse / less contrasty than it could be.
Using a lens intended for a larger format is indeed at least an opportunity to invite more errant light into the system. You can even see this in action on the K-1 or K-1 II with the natively designed SMC Pentax 28/3.5 Shift - shift lenses must necessarily cover more area than the format they are designed for. Flares are much easier to achieve than with similarly coated SMC lenses, and hot spots may be more common on the edges of the frame than usual due to the relative lack of vignette on border photosites.
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Forum: Pentax SLR Lens Discussion
03-06-2021, 03:09 PM
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Not all, but at least 3 wavelengths will focus at the same point, with intermediate wavelengths generally being in better focus than with a less strict qualification (e.g. achromatic).
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Forum: Pentax News and Rumors
02-23-2021, 01:12 AM
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I’m pretty sure all of the limiteds except the 20-40 are screwdrive, which plays a part in keeping them small. And the FA line implies compatibility with film bodies; they’d be redesigned and rebranded D FA otherwise, like the macros.
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Forum: Monthly Photo Contests
02-02-2021, 03:36 PM
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I would like to nominate this photo
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Forum: Monthly Photo Contests
02-02-2021, 03:35 PM
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I would like to nominate this photo
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Forum: Monthly Photo Contests
02-02-2021, 03:35 PM
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I would like to nominate this photo
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Forum: Monthly Photo Contests
02-02-2021, 03:33 PM
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I would like to nominate this photo
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Forum: Monthly Photo Contests
02-01-2021, 11:44 PM
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I would like to nominate this photo
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Forum: Pentax Q
10-06-2020, 06:34 PM
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Indeed! I wasn't sure if I would like it any better than the M 50/1.7 at first, but they're very different and I feel like they both have a place.
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Forum: Pentax Q
10-05-2020, 05:48 PM
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I cry. I even managed to get my hands on a cheap K 50 / 1.2 that would be fun to try with this.
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Forum: Pentax SLR Lens Discussion
09-12-2020, 07:35 PM
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Forum: Photographic Industry and Professionals
09-10-2020, 08:51 AM
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That's not much different from Leica, really.
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Forum: Pentax Camera and Field Accessories
09-09-2020, 08:52 AM
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Those sensors are not curved. The effect you are referring to is likely due to the microlens array or possibly the sensor stack, not sensor curvature. Unless you have a source, I have no reason to believe this. Nothing I have read online points to the A7 or A9 cameras having curved sensors, which would absolutely be noteworthy.
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Forum: Pentax Camera and Field Accessories
09-08-2020, 09:03 PM
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Uh, as far as I know there are no curved sensor cameras on the market yet. Certainly no enthusiast / professional ILCs.
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Forum: Pentax SLR Lens Discussion
09-06-2020, 12:08 PM
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A plastic fantastic 35 / 2.4 could be a good, cheap place to start.
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Forum: Pentax News and Rumors
09-04-2020, 02:11 PM
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You're right that it is arbitrary, but flagship is generally used to mean a top of the line, feature-complete product for which most of their research and development is specifically conducted rather than repackaged pre-existing technology with minor iterative changes. With how sparse Pentax's release schedule has been though, yeah, the distinction doesn't necessarily mean as much to many people as the fact that they're releasing a camera at all. I'm not really complaining - I only have used equipment anyway ( this stuff's expensive!), and in general I'd like for healthier and more sustainable turnover in the tech industry. I suppose it's also a bit odd to people when you call your APS-C a flagship when you also sell a full-frame camera, and though the K-1 II isn't that old, there are things that people would have liked for then as well as some great tech advancements since. A K-1 successor/update that included a BSI sensor could be the bee's knees. I'd be unlikely to buy it on release anyway... but, you know, it would be cool.
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Forum: Pentax K-1 & K-1 II
09-01-2020, 07:12 AM
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I've had a used K-1 a little more than a month now and I only move it from ISO to turn wifi on. :lol: The dial is nice and clicky, so it didn't take too long to learn how to switch without looking. Exposure compensation could be convenient too, especially since it's right next to ISO, but there's already a reasonably convenient button on the camera for that...
But back to OP's question, my "third control wheel" is adjustable with just a thumb and a good bit of pressure, but it is rather stiff and more comfortable to adjust with two fingers, so I think Steve is right that your black one is probably "broken" (which is only a problem insomuch as it bothers you) and the silver is working as intended.
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Forum: Pentax Medium Format
08-31-2020, 09:34 PM
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The GFXs and digital 645s have the same sensor dimensions, and the 645 lenses are made to cover an even larger 6x4.5 negative — even the newer ones, I believe. They should cover the sensor just fine.
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Forum: Troubleshooting and Beginner Help
08-31-2020, 06:18 PM
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My K-1 does the same thing. It's generally not a big deal other than sometimes it dislodges a bit at the extreme end of the focus ring. But I've been shooting a lot with a big, heavy 200 / 3.5 Takumar mounted to it lately and it hasn't been a problem. To get the mount off, I'll either just unscrew it from the lens or put it in another mount that doesn't release when I go to unscrew the lens. I have a *ist DL, K1000, and two K-mount lens adapters for the Q that all securely hold the M42 adapter. I'm not sure why the K-1 doesn't.
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Forum: Pentax SLR Lens Discussion
08-26-2020, 04:40 PM
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I'd much rather it be labelled by f-stop for predictable depth of field. Having to take the shutter speed down a click is pretty much never going to ruin your image, and you can raise the ISO if need be.
I'd still love for manufacturers to publish t-stops in their specs, but unless it's at or better than the competition it doesn't really benefit them from a marketing standpoint - and often the pursuit of better image quality necessarily comes at the cost of t-stop performance.
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Forum: General Talk
08-26-2020, 03:35 PM
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Got my first Takumar in from Japan today: the 200 / 3.5. There are a handful others I'd like to try, but this seemed relatively unique between the preset aperture and (slightly unnecessary) 18 diaphragm blades, so when I found one with the hood and collar for a decent price, I sprung for it. :D
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Forum: Pentax SLR Lens Discussion
08-26-2020, 12:19 PM
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On the HD 10-17 (i.e. the newest version) you can remove the hood and get unblocked circular edges, which is nice.
The 17-28 is great if you specifically want to translate the 10-17 view on APS-C to full-frame, but it has issues. The minimum focus distance is not nearly as good, and the lens has a reasonably common (but repairable) problem with the distance scale and potentially focusing. Which reminds me that I got one for $30 that I need to repair.
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Forum: Pentax News and Rumors
08-25-2020, 11:06 AM
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"The Camera Formerly Known as K-3"
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