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Forum: Pentax Q 07-11-2020, 04:14 PM  
Let's share shots with Q!
Posted By Sykil
Replies: 6,512
Views: 1,025,805
Spoopy
Forum: Mini-Challenges, Games, and Photo Stories 07-28-2020, 03:26 PM  
Dedicated to the lovers of bicycles
Posted By Sykil
Replies: 1,972
Views: 225,056
Lomography Color Tiger 200 / Pentax auto 110
Forum: Pentax News and Rumors 09-04-2020, 02:11 PM  
Product Stories of New APS-C
Posted By Sykil
Replies: 501
Views: 42,233
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.
Forum: Pentax K-1 09-01-2020, 07:12 AM  
Tight knob issue
Posted By Sykil
Replies: 6
Views: 615
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.
Forum: General Talk 08-26-2020, 03:35 PM  
Your latest acquisition
Posted By Sykil
Replies: 21,698
Views: 1,565,002
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
Forum: Pentax SLR Lens Discussion 08-26-2020, 04:40 PM  
Half-Step Aperture Value Incorrectly Labeled!
Posted By Sykil
Replies: 34
Views: 1,433
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.
Forum: Pentax News and Rumors 08-25-2020, 11:06 AM  
New APS-C is
Posted By Sykil
Replies: 1,045
Views: 73,665
"The Camera Formerly Known as K-3"
Forum: Pentax K-1 08-17-2020, 03:24 PM  
Question about compatibility of APSC-designed lenses with K-1
Posted By Sykil
Replies: 16
Views: 1,499
There are pros and cons to smaller and larger pixel pitches, but a full-frame sensor trumps APS-C in image quality whether when you hold either megapixel or pixel pitch equal. It has either better data or more data with which to construct an image, respectively. Larger sensors cost more to source because they're made on wafers, like CPUs, and split up. Larger area means fewer sensors means you're paying a premium to Sony or whoever is manufacturing your sensor.


DSLRs are not primarily designed for astrophotography where pixel pitch is important because it is, in a sense, extreme macro photography. Dedicated astrophotography cameras also tend to use smaller sensors / image circles so that lenses have longer reach.
Forum: Pentax SLR Lens Discussion 08-17-2020, 11:16 PM  
Physical diameter of the lens
Posted By Sykil
Replies: 35
Views: 1,632
The lens doesn’t change; you’re just capturing a crop of it that represents a smaller field of view. The 50mm medium format lens is still a wide-angle lens.

Assuming a rectilinear lens, field of view of the image captured by the sensor can be determined by the sensor dimensions and focal length. From that you have rough categories of focal lengths that you can call wide, normal, narrow or whatever relative to that format. These are conventions that have developed over time mostly relative to the 35mm film format.

But wide, normal, telephoto, etc. are properties of the lens. A rectilinear 25mm designed for Micro 4/3 (e.g. image circle diameter just enough to cover the sensor diagonal) is not a wide angle lens. Ever. Not on a smaller sensor, where the image circle is cropped to a smaller field of view, and not on a larger sensor, where not only does it not cover the entire sensor — it is fundamentally not designed to capture light from that wide of an angle.

When the lens is specifically designed for that format, defining wide/normal/narrow by focal length relative to sensor dimension and by focal length relative to image circle diameter are basically the same thing. But, yes, that falls apart when you look at lenses in general across different formats and designs. In photography full-frame is often assumed, but formats are pretty diverse now in the enthusiast still photography world. More generally, those definitions refer to the lens because there are unique design considerations based on the angle you’re capturing, not only in terms of just capturing a rectilinear image of that angle, but also controlling aberrations and distortion, which is particularly tricky for a wide angle.
Forum: Troubleshooting and Beginner Help 08-13-2020, 12:53 AM  
Is there a body with Manual Focus Length setting of 60mm?
Posted By Sykil
Replies: 12
Views: 840
Not helpful, but the Q lets you do increments of one. I was surprised when I got my K-1 and it couldn't. Ultimately it's just for sensor stabilization so as long as you're in the ballpark it's fine.
Forum: Pentax Q 08-05-2020, 04:20 PM  
Now you can order a Metabones K to Q Speedbooster!
Posted By Sykil
Replies: 108
Views: 7,060
That adapter isn't a telecompressor; I believe the only reason it has an optical element is because the flange distance between F and K mount is basically the same, so an optical element is necessary for infinity-focusing if your adapter is adding distance between the lens and focus plane. If it shrunk the image like a telecompressor, you'd end up with heavy vignetting and a smaller usable frame.
Forum: Pentax Camera and Field Accessories 08-01-2020, 10:47 AM  
Adaptist PK+MM installation and usage
Posted By Sykil
Replies: 114
Views: 8,385
What a shame! That hay bale photo is really lovely otherwise.

Actually, those clouds look weirdly more in focus than the nearer trees. But that may just be contrast playing a trick on me.
Forum: Pentax DSLR Discussion 07-19-2020, 05:44 PM  
The Six-Megapixel Club
Posted By Sykil
Replies: 2,107
Views: 182,008
I was taking a picture of our dying rose when I spotted this guy.
Forum: General Talk 07-19-2020, 09:52 PM  
Your latest acquisition
Posted By Sykil
Replies: 21,698
Views: 1,565,002
IKR, digital! You can't even put film in an M10. Junk. (Srsly though, what weirdos.)


Got my first K-mount wide-angle prime off eBay. Hoorah! SMC M 28mm/3.5. It's actually in much better condition than I expected.
Forum: Pentax DSLR Discussion 07-22-2020, 09:36 AM  
645D advantages over K3II?
Posted By Sykil
Replies: 18
Views: 1,269
I think so. An APS-C sensor is little more than a quarter of the size of a 645D sensor. There are certain advantages to such a large sensor that can be imitated, but not replicated. That said, even the newer APS-C sensors handle light much, much better, and that is one of the distinguishing factors between the 645D and 645Z in terms of bottom-line image quality: high ISO and dynamic range improvements that are appreciable to the eye. Another thing to consider: the K3II has much better continuous shooting speeds – 8.1 vs 3.1 and 1.1 frames per second for the K3II, 645Z and 645D respectively. I think the K3II still has the highest continuous shooting speed of any Pentax DSLR so far, but I could be wrong about that. Certainly not relevant to everyone's photography, but it's a large enough difference to be worth noting.


Here are some spec comparisons that may be helpful:
Pentax 645D vs Pentax K-3 II
Pentax 645Z vs Pentax K-3 II
Pentax 645D vs Pentax 645Z

And here are some studio scene comparisons from DPReview. They changed their test scene between the 645D and Z, but I tried to pick some contemporary cameras for each that could be helpful points of reference:
Old DPReview Studio Scene: 645D vs K-01 vs K5II vs K5IIs
New DPReview Studio Scene: 645Z vs K1II vs K3II vs KP


There are a lot of considerations. Beyond the physical capabilities of each camera model, each one processes images differently. For example, in the new studio scene, there's a mole or freckle near the crease of the upper right East Asian woman's left nostril (our right) that only the 645Z and K3II capture. I've been comparing that spot in particular with different cameras from various manufacturers; I think many newer cameras may throw it away as noise.

I'd also consider lenses. The 645 is a smaller and potentially more expensive ecosystem of lenses, and you have even fewer options in terms of adapting (if that matters to you).

If the bottom line is image quality, I think the 645Z wins hands down. I do really like colors of Pentax's old CCD sensors, but the cost of a 645D is hard to justify against the other image quality advantages of a comparably priced K-1 – to say nothing of the lens ecosystem or other features.

Edit: Bleh, the old studio scene doesn't want to preserve those camera selections for linking. You can just put in the cameras I mentioned or whichever you prefer.
Forum: Pentax Q 07-19-2020, 05:42 PM  
Let's share shots with Q!
Posted By Sykil
Replies: 6,512
Views: 1,025,805
Found a friend today.
Forum: General Photography 07-16-2020, 09:41 PM  
COVID-19 in San Francsico
Posted By Sykil
Replies: 12
Views: 1,236
Sleater-Kinney have a song inspired by this called "Light Rail Coyote."
Forum: Pentax News and Rumors 07-18-2020, 03:41 AM  
What Pentax Values Most in Future Cameras
Posted By Sykil
Replies: 363
Views: 25,859
Hoya sold the camera division to Ricoh, full stop. Hoya continued to manufacture Pentax-branded products, but not cameras.
Forum: Photographic Industry and Professionals 07-17-2020, 08:50 AM  
Thoughts about DSLR lens value in times of mirrorless cameras
Posted By Sykil
Replies: 14
Views: 1,240
Q shooters know the value of a good lens, no matter the mount or even intended function. :)
Forum: Pentax DSLR Discussion 07-11-2020, 12:18 PM  
The Six-Megapixel Club
Posted By Sykil
Replies: 2,107
Views: 182,008
Oo cool spot.

Macro is hard. FA 80-200 with a M 50/1.7 coupled in front. Missed him in the first one but then I kinda liked the composition of him walking out of frame with the web bokeh behind. I got this *ist DL to fool around with infrared and have a cheap APS-C body to throw my lenses on for now. Honestly, the image quality is much better than expected. Edge detail is a lot better compared to the Q10 I've been using (which also fringes like mad in high contrast scenes) despite half the resolution. But being able to get such strong telephoto FoV from cheaper lenses is a huge plus, so they complement each other.
Forum: Pentax Film SLR Discussion 07-09-2020, 02:42 AM  
:cool: Lets see those ''film'' shots
Posted By Sykil
Replies: 21,995
Views: 2,791,677
Hoorah, recently got back my first roll of fim. Besides disposables as a kid, that is. I was pretty pleased with the results!

K1000, Ilford HP5
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