ProfHankD

ProfHankD

Lives in United States Lexington, United States
Works as a Professor
Has a website at http://aggregate.org/hankd/
Joined on Mar 27, 2008
About me:

Plan: to change the way people think about and use cameras by taking advantage of cameras as computing systems; engineering camera systems to provide new abilities and improved quality.

Comments

Total: 1217, showing: 41 – 60
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Meh. I think the problem is that my favorite films aren't around now and digital has gotten VERY good. For critical stuff, I used to shoot Panatomic-X @25 souped in 1:100 Agfa Rodinal for B&W -- it told me Tri-X 400. For color, I used to shoot mostly Kodachrome 64, and it suggested two films I never heard of. Difficult to judge anything by little images in a WWW browser....

Link | Posted on Feb 10, 2017 at 02:17 UTC as 18th comment
On article Google AI adds detail to low-resolution images (150 comments in total)
In reply to:

Matthew Miller: > Eventually we might even be able to extract high-resolution images from low-quality security-cam footage a la CSI.

This is an incredibly dangerous line of thinking. These images are not reconstructed — they are _imagined_. It's even clear in these examples: look at the eyelines in the "ground truth" images vs. those in the "upsampled" ones. The constructed images clearly show the subjects looking in a direction they were not. They are, as apparently we say these days, alternative fact images.

The technique might be good for filling in backgrounds or for artistic purposes, but as photographers and technologists we have a responsibility to make it clear that they bear no relation to reality.

It's been easy to create a high-res version of an image for several years, for example, enhancing the image of a car license plate from just a few pixels. The problem is that the text on the license plate would match whatever you used in your training set -- not the one photographed. ;-)

Link | Posted on Feb 9, 2017 at 00:42 UTC
In reply to:

pkcpga: Awesome technology, can't wait to see a larger version. This would definitely help Sony phone sales, only issue is how much memory would your phone need for even just a few short films at 1000 fps and how long can it shoot continuously for. Can't wait to see the final product.

Revenant: I think this is a new fab process, but implementing the same functionality. Still a noteworthy step forward.

Link | Posted on Feb 8, 2017 at 11:21 UTC

#28 looks like what would happen if a clear-bodied Prius drove into a white dropcloth at 70MPH. Anyway, a car seems a bit off topic for DPReview... until one realizes that Toyota already ships an advanced electronics package that uses a bunch of cameras to create a stitched aerial view of the car and surroundings. Come to think of it, why hasn't DPReview done an article on that?

Link | Posted on Feb 8, 2017 at 02:13 UTC as 2nd comment | 1 reply

A new STF lens that can PDAF -- that's a new trick! This is a lens that Canon and Nikon can't touch -- like the Minolta 135mm STF, but AF with OSS and apparently also close focus (1:4). Wow.

Link | Posted on Feb 8, 2017 at 01:55 UTC as 30th comment | 4 replies
In reply to:

pkcpga: Awesome technology, can't wait to see a larger version. This would definitely help Sony phone sales, only issue is how much memory would your phone need for even just a few short films at 1000 fps and how long can it shoot continuously for. Can't wait to see the final product.

Sort-of negative wait time. Look at the last two RX100. Not exactly the same tech, but very similar, with 1000FPS 1080 (well, it records as 1080, but is actually from fewer pixels) thanks to a 1" sensor backed with DRAM.

Link | Posted on Feb 8, 2017 at 01:39 UTC
On article Leica Summilux-SL 50mm F1.4 sample gallery (368 comments in total)
In reply to:

mxx: Just so everybody knows: I've got nothing to say about this lens.

There, I've said it.

Meh.

Link | Posted on Feb 6, 2017 at 16:38 UTC

Very nice. A tad bizarre that on the right side of the article title it says:

"Buy on Amazon.com From $2,796.95"

What was that selling? ;-)
I don't think this was really about the camera they used.

Link | Posted on Feb 4, 2017 at 16:15 UTC as 49th comment

I had a pair of these with FC-E8 converters tethered to a laptop on a simple autonomous robotic platform to capture fisheye images that that were sent to a cluster supercomputer to stitch and present an interactive 360-degree pan/zoom display on a video wall. That was in our 1999 research exhibit at the IEEE/ACM Supercomputing conference. After that, one became the tethered camera in the ceiling of my machine room... and it's still there, but not running since our last major cluster build party. A shot from it is at http://aggregate.org/SENSORS/108AMARK/bignow.jpg . Last count was over 3,000,000 exposures and still ok.

Link | Posted on Feb 2, 2017 at 22:26 UTC as 46th comment
On article Sony SLT a99 II Review (1567 comments in total)
In reply to:

ProfHankD: An absolutely top-of-the-line camera that still gets little respect in the comments here and is getting reviewed a year after release....

BTW, the comments about lenses are simply incorrect -- if you actually go count how many AF lenses (new+old, but mostly old) are available in A mount it is literally MORE than are native for any other mount (e.g., based on actual counts from places like KEH and eBay). Basically, Minolta was the first with a "modern" AF SLR so everybody made lenses for it -- and they're inordinately cheap now because A mount is no longer as popular. Take a look at Dyxum for a well-maintained list of many of the A-mount lenses with reviews.

HFLM: the 5D IV problem might be triggered by the adapter (?), but the camera locking and SAYING the battery should be removed and reinserted is a demented response which is very clearly how it was designed to behave when it detected some sort of lens error. As for the A-mount lenses, old ones don't have a focus motor -- it's in the body, like Nikon also did -- so it's plenty fast, but noisy (i.e., not ok for video). As for 42MP, almost no lenses with designs older than 3 years were literally designed to handle that -- and certainly not most Canon nor Nikon lenses. That's fine. Being at or beyond a Nyquist sampling of lens resolution is largely a good thing.

Link | Posted on Feb 2, 2017 at 15:53 UTC
In reply to:

noflashplease: It looks fascinating and I might even buy one if it was a Lomography or MINT product. However, this is coming from a part of Eastern Europe without any obvious production infrastructure for this type of project. I'm also a bit concerned about the bellows material and I question just how the film extraction mechanism will work?

The prototype looks a little too slick and the best sample images don't look like the results you'd expect from an amateur meniscus lens. A little too good, if you ask me. Color me suspicious.

The lens is wide open at f/8 -- it doesn't take much to render at that print size when stopped down a bit. As for the manufacture, I think I could do nearly the whole thing (except the lens blanks) with a $350 laser cutter. This is easily in the range of quick builds in the workshop of a competent "maker" -- in fact, the ease with which competitors could duplicate/improve on this is probably the weakest aspect of the product.

The only thing that bothers me is the environmental claim. The instant film is not all that environmentally friendly.

Link | Posted on Feb 1, 2017 at 15:58 UTC
On article Sony SLT a99 II Review (1567 comments in total)
In reply to:

ProfHankD: An absolutely top-of-the-line camera that still gets little respect in the comments here and is getting reviewed a year after release....

BTW, the comments about lenses are simply incorrect -- if you actually go count how many AF lenses (new+old, but mostly old) are available in A mount it is literally MORE than are native for any other mount (e.g., based on actual counts from places like KEH and eBay). Basically, Minolta was the first with a "modern" AF SLR so everybody made lenses for it -- and they're inordinately cheap now because A mount is no longer as popular. Take a look at Dyxum for a well-maintained list of many of the A-mount lenses with reviews.

Incidentally, I now prefer Sony E-mount bodies (which, via adapters, can take and even AF more lenses than any other mount -- it can even AF many manual lenses using the LA-EA7). I have to add that I recently got a Canon 5D IV for my research and it is honestly driving me nuts -- it is a very "polished" design, but has all sorts of really serious dumb problems (e.g., locking-up and telling me to remove the battery just because it had a glitch taking to the chip on a manual lens adapter), and IQ is much better than older Canon chips but still not really in the same class as the Sony FF sensors.

Link | Posted on Feb 1, 2017 at 13:34 UTC
On article Sony SLT a99 II Review (1567 comments in total)

An absolutely top-of-the-line camera that still gets little respect in the comments here and is getting reviewed a year after release....

BTW, the comments about lenses are simply incorrect -- if you actually go count how many AF lenses (new+old, but mostly old) are available in A mount it is literally MORE than are native for any other mount (e.g., based on actual counts from places like KEH and eBay). Basically, Minolta was the first with a "modern" AF SLR so everybody made lenses for it -- and they're inordinately cheap now because A mount is no longer as popular. Take a look at Dyxum for a well-maintained list of many of the A-mount lenses with reviews.

Link | Posted on Feb 1, 2017 at 13:32 UTC as 247th comment | 11 replies
In reply to:

Prairie Pal: Those aren't girders laying on the floor. What we're looking at are storage racking and black storage boxes that fell from the walls. The exaggerated depressing lighting in the photo gives the impression of catastrophe. Tragic loss of lives aside, there really wasn't as much to overcome as Sony needs us to believe.

Beyond the work of reconstructing clean rooms and replacing/repairing specialized equipment, there is real danger in this level of destruction because of the extreme toxicity of some of the materials used in VLSI fab. I'm aware of fabs where the plan in case of accidental internal release of some materials was literally immediate and permanent sealing the facility (with the contaminated workers inside). Although that type of worst-case scenario doesn't seem to have happened, the potential for it can make repairs a much slower and more deliberate process than you might think... surprisingly like clean-up of a potentially-damaged nuclear reactor.

Link | Posted on Jan 28, 2017 at 15:38 UTC
In reply to:

role_of_72: Beautiful camera!
But on the bottom... is it scratched already? Is it that vulnerable (despite the coatings) or just a displayed item was (ab)used?

Glossy multi-layer (slightly different color layers) paint is fairly susceptible to showing minor injuries. More importantly, the marks don't look cool. My old Minolta XK's black paint has some worn spots and nicks that reveal the brass underneath it, but those battle scars actually give it what antique dealers would call "a nice patina."

Link | Posted on Jan 25, 2017 at 21:26 UTC
On article Sigma 85mm F1.4 Art sample gallery updated (94 comments in total)
In reply to:

zakaria: Great series of pictures. The lens is deserves every $.

Lots of good stuff there, but my test for 85mm is always how it does against the dirt-cheap Samyang with the top-notch bokeh. On the non-portrait stuff, I think the Samyang actually might do a little better... but much of the non-portrait stuff here is pretty bad. On the portraits, this looks at least comparable to the Samyang, but it seems to focus closer -- the Samyang has trouble making a tight portrait. The comparison in the post below certainly suggests this isn't as good overall as the Sony GM. We need to see a lot more to see where it really belongs in the fairly wide gap between those two. ;-)

PS: I can AF my Samyang using the LM-EA7, which also gives it closer focus.

Link | Posted on Jan 25, 2017 at 16:50 UTC
On article Fujifilm X100F pre-production sample gallery (235 comments in total)
In reply to:

J A C S: Very nice color. This reminds me of what one of the Fuji executives said recently - we are not a camera company, we are a photography company.

Fuji is very careful to keep a FujiFilm look to their shots, and these definitely have it. Pretty nice handling of the JPEGs in general (e.g., good balance of noise reduction and detail retention), although they let the blacks block-up too much for my taste (as other Fujis do to). Not sure why the last B&W shot is so coarse... trying to emulate pushed Tri-X?

Link | Posted on Jan 23, 2017 at 13:52 UTC
On article Leica M10 real-world sample gallery (345 comments in total)
In reply to:

JakeB: There's just a certain 'something' about those shots. An aura. A 'feeling.'

It would be ridiculous to suggest that any other manufacturer's camera/lens combinations costing a tenth of the price could create this 'look.'

It's almost like Leica sprinkled a little, well, let's call it 'pixie dust' into their cameras and lenses and that magic travels along the lens to the sensor and is captured along with the rays of light.

Or perhaps the sensor itself contains this pixie dust and thus imbues the image with the 'aura.'

No matter how it works, one can immediately spot this 'Leica look' that no other camera is capable of creating. It positively glows from each image.

Money well spent, I'd say.

Maybe "pixel dust" -- there's got to be some explanation for why shots as low as 1600 on a FF 24MP sensor have a gritty/grainy look. I have a sneaking suspicion that this sensor should always be shot at 100 and digitally pushed after the fact. Still, I suppose those who really want to own a Leica M are happy this wraps fairly modern guts in a Leica skin for just $6K....

Link | Posted on Jan 22, 2017 at 14:05 UTC
On article GIMP seeks funding for future advanced features (239 comments in total)
In reply to:

capanikon: Gimp is quite good and under appreciated by some.

I think very few really appreciate the role GIMP has had in getting new image processing technology out there. Lots of PhD theses and other academic research projects became real stuff by plugging-into GIMP, and the fork of CinePaint had a pretty significant role in the movie industry.

The catch is that you can't just build a major software tool and say "done!" Bit rot is real, and so is the need to add support for new things. It's happily shockingly common that people will donate years of effort to making free software (I have myself), but very few are willing to make one free program their life's work (I'm not). In sum, these are people passionate about the community service they are providing, and they deserve to be supported.

While we're at it, also think about the many other key bits of software that come out of such passion; e.g., Dave Coffin's dcraw. These folks are heroes.

Link | Posted on Jan 20, 2017 at 01:20 UTC
On article Leica announces M10 with new sensor, slimmer design (113 comments in total)
In reply to:

Kivivuori: Hmph,

"(....) M10 measuring just as thin as a film-era M4"

Not even close (M4: 33,5mm)

And just that`s why M4 feels much different - and better - in hand than M6TTL-models or any digital-M so far.

You know, I'd never notice the 4mm improvement that they had to sacrifice all the I/O ports for... but I think I'd notice the lack of I/O ports.

Link | Posted on Jan 19, 2017 at 03:43 UTC
Total: 1217, showing: 41 – 60
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