Forgot Password
Pentax Camera Forums Home
 

Showing results 1 to 25 of 89 Search:
Forum: Pentax Full Frame 03-17-2016, 03:37 PM  
Pentax K-1 catalog (Require translation)
Posted By spade111
Replies: 5
Views: 1,780
Nice find, thanks!
Forum: Pentax News and Rumors 09-08-2015, 05:57 PM  
FF out in 4 months
Posted By spade111
Replies: 1,200
Views: 121,211
Maybe some garlic, and a stick of buttaaaah
Forum: Pentax News and Rumors 05-21-2015, 05:19 AM  
Service in Canada
Posted By spade111
Replies: 57
Views: 8,817
Oh, sorry - I meant the picture you posted of the coast. He sells chocolate too.
Forum: Pentax News and Rumors 05-20-2015, 09:31 AM  
Service in Canada
Posted By spade111
Replies: 57
Views: 8,817
Is this just around the corner from Middle Cove? Also - I would have to agree that Derek is a real champ, and there is no wonder that Ricoh agreed to build him a display :) Awesome to hear about the Z. Can't wait!
Forum: Photographic Industry and Professionals 11-06-2014, 01:46 PM  
Concept: Computationally generated DOF by zValue integration
Posted By spade111
Replies: 5
Views: 843
Here is an actual real world use of the technology. Pretty cool Microsoft.
While You Weren't Looking, Dell Made Android Tablets Interesting Again

---------- Post added 11-06-2014 at 01:50 PM ----------

Computational generation of out-of-focus rendering with this technology might finally kill the DSLR. :(

There is of course limitations to this technology, but it will allow the simulation of any lens. Banking the actual z data from the scene will do much more for the accuracy of the simulation than would artificial techniques via only 2d software.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 05-15-2014, 03:58 PM  
New Lytro Illum Superzoom
Posted By spade111
Replies: 15
Views: 1,366
Just reading more about the light field stuff - it seems that indeed the lens is indeed an f2.0 throughout the zoom range (just not a very good one by our standards... but apparently it doesn't need to be). Any aberrations / deficiencies can be (and presently are) corrected in software - however the quality of the refocusing array plays a large part in making this effective.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 05-12-2014, 09:18 PM  
New Lytro Illum Superzoom
Posted By spade111
Replies: 15
Views: 1,366
Based on the way the technology works - I'm not sure that this lens is truly F2.0 throughout the zoom range - or really anywhere near F2.0 - and besides - it wouldn't need to be. I thought the image was reconstructed from the incident information in front of and behind the imaging sensor to provide information about the OOF area. Essesntially the sensor records optical information - but in a way that is very different than the traditional. Ie: you cannot look at the light falling on the sensor and see what the sensor sees?
Forum: Pentax Camera and Field Accessories 03-14-2014, 06:49 PM  
Best bag for backpacking?
Posted By spade111
Replies: 28
Views: 2,082
Chest pack is the best bet for easy acess.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-13-2014, 04:56 AM  
Take anywhere camera
Posted By spade111
Replies: 45
Views: 3,587
What about the x100s?
Forum: Pentax Full Frame 03-08-2014, 05:57 PM  
Anyone wish for FF dedicated B&W
Posted By spade111
Replies: 38
Views: 2,589
Preface: sorry op for going off topic!
So what you're saying is that the raw output Bayer pattern of a 36mp sensor is interpolated to provide 36mp full resolution, rather than being made up of 36mp worth of 2x2 sub pixels? That actually makes some good sense. I should read more ;).
Forum: Photographic Industry and Professionals 03-08-2014, 11:38 AM  
Concept: Computationally generated DOF by zValue integration
Posted By spade111
Replies: 5
Views: 843
Here is a real time demonstration of microsoft doing iterative precision refinement. From 2011...
















You Tube



Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-08-2014, 11:29 AM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
Thanks Rupert - I think that you're just about right - and I'm in no way offended or amazed that you prefer the X-T1 to anything that I shoot with :) BTW - Mrs. Spade111 is the insane one. :) I hope she doesn't read this thread.

Your preference makes total sense - that camera is awesome to have in hand, and feels like a nice brick. I'm going to sell my D600 as soon as its back from the shutter repair as the d600 will get absolutely zero use. (on a side note - my d600 didn't get too much trouble from the oil issue. I had about ... actually not totally sure how many frames through it, and not even a smudge. Maybe 5-10k? A bit of dust maybe - but the arctic butterfly takes care of that np). As much as I hate to sell camera gear - i hate more to have it sit around the house all day. I think my next acquisition will be something from the fuji camp - but it might be the x100s. I think it has the same sensor as the X-T1? - or something similar?
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-08-2014, 08:20 AM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
Thanks Byrd, it's nice to get some first hand reports on the zeiss stuff - I haven't actually handled any of them yet. I'm also glad to hear that the nikkors are that impressive. The 135 is that good? I'm kinda pumped to get out and find a few old lenses that I will be able to run without worry. I might see if the camera shop has anything in stock (zeiss or AI-s) that I might play with, and I'll upload some pics when I can.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-07-2014, 03:45 PM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
I've got actually a nikon 20mm aF-d f2.8. Not too expensively, pretty decent, has aF, but not in league with the zeiss I'm sure.
Forum: Pentax Full Frame 03-07-2014, 03:40 PM  
Anyone wish for FF dedicated B&W
Posted By spade111
Replies: 38
Views: 2,589
Whoops, missed that post by Adam.

It stands to reason that removing the Bayer filter, and running pixels straight should increase the dynamic range somewhat, as temporally the "light bucket" is looking at all wavelengths in the visible spectrum (therefore a higher signal intensity) but is subject to the same level of background sensor noise. Since cutting out certain frequencies should ostensibly decrease the s:n ratio, the path to higher dynamic range should involve no pre sub-pixel color filtering no?

Though... It makes sense that the leica sensor would suffer from greater clipping. Greater signal intensity per channel, more quickly saturates the light bucket. If the sensor is tuned to a very high sensitivity, say goodbye to your highlight preservation. I'd assume though that the shadows pull very easily from the raw output on the monochrom. Maybe there needs to be some automatic attenuation for high intensity.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-07-2014, 03:24 PM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
Also Byrd, since you've had the zeiss stuff, have you considered picking up any of the zf.2 lenses? A few of them look quite attractive in terms of rendering and I'm thinking they might be fun to play with. They certainly have the build of the pentax limiteds, though I think they are a bit slower. Were the nikon lenses overall better that you chose not to go that way?
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-07-2014, 11:51 AM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
I've been thinking about that 50 ai-s. Sounds like you digt it! Have any shots with that one?


Also, awesome looking shots tuco!
Forum: Pentax Full Frame 03-07-2014, 11:01 AM  
Anyone wish for FF dedicated B&W
Posted By spade111
Replies: 38
Views: 2,589
You're absolutely right in the context of the electrical output/translation of subpixels on current sensors with the Bayer filter popped off. Would it not be possible to re engineer the sensor (and or the raw subpixel output) to provide luminance data from each subpixel? Even in most current sensors I believe the subpixels are essentially identical behind the color filter no?
Forum: Pentax SLR Lens Discussion 03-06-2014, 04:23 PM  
DigitalRev rates to 5 pancake lenses - Pentax in the list
Posted By spade111
Replies: 6
Views: 1,165
Yikes. Not sure why he thinks this lens suffers any shame.... The other lenses save the canon are designed for systems with similar "limitations".
Forum: Pentax K-3 03-06-2014, 10:52 AM  
Just What I Needed
Posted By spade111
Replies: 5
Views: 678
Beauty!
Forum: Photographic Industry and Professionals 03-06-2014, 06:50 AM  
Concept: Computationally generated DOF by zValue integration
Posted By spade111
Replies: 5
Views: 843
Here is another video showing a higher resolution iteratively corrected 3d scene. This one is the most impressive I've come across.
















You Tube



Forum: Pentax Full Frame 03-05-2014, 08:53 PM  
Anyone wish for FF dedicated B&W
Posted By spade111
Replies: 38
Views: 2,589
I think a full 14 bit, 36mp sensor could be pretty spiffy (though I would probably prefer something like 16-24). As a B+W chip - you could do away with the color filter (that is used to define the Bayer Matrix), so that the effective pixels you'd have available with a color 36mp sensor would actually be 4 times that (144mp). You'd be way waaaay beyond practical resolving limitations at that pixel pitch - so, in reality you could have much larger photosites, with extremely high S:N, and likely a crazy high dynamic range.

I think Leica did something cool like this a while back - their monochrome camera has incredible output. The register distance on those cameras is ridiculously short (like half that of the k-mount) - so you can essentially mount any piece of glass on it via an adapter. Noctilux f0.95? Yikes.

Astro would be the ultimate - I think the digital collectors on some telsecopes are BW - cooled via helium to nothing - so there is essentially no relevant noise.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-05-2014, 08:27 PM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
Louicio - Yes it does in fact have live view - with a very good focus peek for manual focus.

Reeftool - I think you are correct in that nikon was working at finding a new category to go after. I think there was an interview somewhere that said with the change in the photography industry (read: smartphones) - that they would begin to pursue higher margin / lower volume products, which hopefully means they are committed to higher quality - as much is evident with the Df.

jpzk - thanks for the kind words! Cheers!

Here are just a couple of quick photos for the sake of comparison. I don't normally make things for public consumption, these are horrible and I am embarrassed. Nonetheless - here are some different iso shots. I just shot like I felt like, with no rhyme. Raws SOOC with whatever color profile my spyder said was right. All just for you. This is getting weird again.


Iso 320


Iso 1600


Iso 6400


Iso 25k


A little note about that last shot there - the room is lit by my computer screen. I can't really make anything out in the viewfinder, and I focused on the little drawer rail in the middle without any difficulty. I'm not sure what you'd call it in here since I don't have a light meter... but hold on maybe I can work it out a sec. Based on the parameters: 1/25s, iso 25600, aperture 2.8 - the EV is between 0 and -1. Focus nailed on the first try. It won't focus very well on something with little contrast here however. (ie: the middle of the drawer).
Forum: Photographic Industry and Professionals 03-05-2014, 01:49 PM  
Concept: Computationally generated DOF by zValue integration
Posted By spade111
Replies: 5
Views: 843
One could indeed go buy a lytro already. Thanks for that.

---------- Post added 03-05-2014 at 02:04 PM ----------

The next step I think is actively being pursued by university (and likely industry) researchers. Fully mapped 3d environments using the point cloud data, with iterative improvements in precision through computational interference interpolation.
















You Tube




Ostensibly we could use this to generate accurate representations of any lens, any aperture, and any perspective within the scene. Although at this point... We are talking less about photography and more about a virtual environment suitable for consumption via the oculus rift or similar devices.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 03-05-2014, 01:20 PM  
Df mini review / impressions - in disorder. Seriously this review is crap.
Posted By spade111
Replies: 37
Views: 2,586
Thought I'd quickly (well when I started I thought it would be quickly) chime in on this camera.

Picked up a black Df a few weeks ago, with the kit lens that has a silver ring on it designed to look like an aperture ring (however functionally it does absolutely nothing). Disclaimer: I like nikon /canon stuff for the most part, but I'm emotionally invested in pentax.



Impressions:

- I think it looks cool. In black. The silver one kinda looks a bit too much like a zebra with the black flash mount protector in place. If I had the silver one I'd pop that thing out and throw it away.

-the fake aperture ring on the kit lens is kinda funny. It doesn't do anything but looks similar to what you'd find on an older AI-S lens. I kinda get that they weren't prepared to go full mental and ditch some of the greatest advancements we've made in photography (auto focus, auto aperture). But they could have designed a lens with auto/manual options. Or maybe repurposed an older 50mm 1.4D?. The fake ring is hard to understand. Unless it's a joke. It's either really insulting or a winking dad joke.

-really chunky and solid in the hand. I don't at all understand people calling this thing cheap feeling. All of the surfaces are nicely tactile, with a warmth that develops over a few minutes, and holds for a while. It's cold out right now.

-I like the control scheme. The dials have a really quality feel. You turn them one click and they chink into place and stay there. There is no slop. The precision of these switches and dials feels luxurious. I primarily use aperture priority mode, and chimp exposure with compensation if I need to, works a bit better with a flash commander this way. It feels nice to interact with the camera in this way.

-shutter sounds ace

-aF speed is fast with the center aF point. Faster than my d600 somehow(?), but I haven't used a d800 or d4 enough to miss the difference compared to those cameras. I'm sure they are much faster... But I don't really care. I'm mostly a focus recompose, and zone focus dude anyhow, so the tracking speed I haven't used enough to criticize. Destroys the k5 in low light responsiveness, and never really misses focus if it locks on. Better still than the k5ii. Certainly nothing like the old back/front focusing problems that have plagued my pentax k10d and k5 experiences.

-image quality is good, maybe a stop better noise wise than the d600. But, seriously ISO 200,000 is useless. 100,000 maybe ok in BW for taking ironic facebook pictures of a typewriter, but not for much else.... 25000 is the max I might turn to, but practically anything below 12800 is ok.

-don't miss the lack of video. Rx10 if that's your thing.

-I can bring it to a party and not be that weird guy with the camera. People are receptive to this camera in a way they are not to most other dslr's out there... Except maybe the Olympus,Fuji, and to some extent the weird and cool sony stuff.

-I wish my pentax limiteds fit on the front of this thing. The Df looks kind of mashup with a modern zoom lens on the front, I think it would look even weirder on the silver model. With a nice prime though looks cool. Problem is, nikon doesn't really have a lot of small high quality primes.

-For some reason this camera gets a lot of polarizing reactions from people on the internet. In real life people think it's cool across the board.

-I don't understand the logic that portends the Df is a bad camera because functionally for the same money there Is a better camera in nikon's stable (d800). I like to pick up and play with the Df, and it sort of encourages me to take pictures with it. The d800 is a maybe more functionally suitable for hours of work, and has way more pixels, and has a faster aF, and better... I don't know modern styling maybe... But it all just seems like a d800 is used to do work. I don't want to do any work with photography anymore, I want it to be fun, and encouraging, and maybe even entice a bit of a sense of humor about itself... With a fake aperture ring (I hope that was the point otherwise it's downright mental).

-I think it's ok that the Df is maybe a bit more about style and ergonomic enjoyment, than purely about making the camera disappear in your hands and become an extension of your personality... Because if that last bit were true, it would end up sitting in front of the computer all day. There is something to be said for enjoying style. Unless you're in the third phase of kierkegaardian development and style truly is a distraction.... The Df is enjoyable on many fronts.

-Nikon's horribly self righteous marketing campaign was a huge buildup for something that maybe isn't so much about pure photography. Pure profit margins by responding to market forces maybe.

-it's kind of expensive. If you were going to purchase a new ff camera, maybe you'd pick this one. Depends on what you want I guess. For the money It doesn't do as well I'd say practically as the d800 maybe, as that has a more complete feature set? It's also true that a 4x4 is more practical than an old motorcycle. Unless you live in a city where it never rains, and you don't ever need to drive someone home or pick up groceries. If all you care about is yourself and you survive on convenience store fare... Then the Df is for you? This got weird.

-if I could only have one camera... It might be the Fuji x100s. If it had to be a dslr, and I was on a limited budget, k3 no question. If I could have a bunch... One of them would for sure be a Df.
Search took 0.01 seconds | Showing results 1 to 25 of 89

 
Forum Jump


All times are GMT -7. The time now is 02:42 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top