Joseph S Wisniewski

Joseph S Wisniewski

Lives in United States Detroit, MI, United States
Works as a Speech and sensor scientist
Has a website at http://www.swissarmyfork.com
Joined on Jul 12, 2002
About me:

I've been in love with photography for over 40 years.

My favorite form of photography is macro, and much of my gear is of my own design.

I've done professional photography on and off for over 20 years.
Taught 8 years at Midwest Photography Workshops.
Designed 3 scientific digital cameras and 6 lenses.

Author of mImage and (coming soon to the App Store and Google Play) ColorForEveryone.

Comments

Total: 519, showing: 21 – 40
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The picture showing the eye is either deliberately deceptive or totally misinformed. The radius of the eye is many times tighter than the Petzval surface of the eye's lens. That is why much of the retina forms a flat tension surface in front of the curved eyeball. The optical system, as drawn, would be substantially worse than a flat retina.

Eyeballs are round because eyes tilt and pan. That's all there is to it.

Direct link | Posted on Jun 18, 2014 at 05:47 UTC as 116th comment | 8 replies
In reply to:

MarcMedios: So... following Leica's journey from real camera to fashion accesory, Hasselblad --up until now the standard in large format photography-- has also become a fashion accesory and "certifies" cell phone cameras in an $11,000 cell phone. I don't know about the Swedes, but at least the Japanese had the inner strength to commit suicide when their dignity was lost.

I don't see where the GX645AF SLR ever became a rangefinder.

http://camera-wiki.org/wiki/Fujifilm_GX645AF

Direct link | Posted on Jun 11, 2014 at 01:50 UTC
In reply to:

MarcMedios: So... following Leica's journey from real camera to fashion accesory, Hasselblad --up until now the standard in large format photography-- has also become a fashion accesory and "certifies" cell phone cameras in an $11,000 cell phone. I don't know about the Swedes, but at least the Japanese had the inner strength to commit suicide when their dignity was lost.

Yes, it does. And the "baker" who keeps filling it with false information is too persistent to fight.

Direct link | Posted on Jun 11, 2014 at 01:19 UTC
In reply to:

Caleido: A brand selling out its name like this, is a chronicle of a death foretold.

Leica Camera still seems to be hanging in there.

The Zeiss Foundation is still around.

Direct link | Posted on Jun 10, 2014 at 01:08 UTC
In reply to:

MarcMedios: So... following Leica's journey from real camera to fashion accesory, Hasselblad --up until now the standard in large format photography-- has also become a fashion accesory and "certifies" cell phone cameras in an $11,000 cell phone. I don't know about the Swedes, but at least the Japanese had the inner strength to commit suicide when their dignity was lost.

Ah, but there is a Fuji to rebadge, the GX645AF series.

You note I'm "not specific about who did the engineering"? Did you miss this?

"It's easy to discover that Fuji designed, patented, tooled, and built every last bit of the H system, with one tiny exception. Hasselblad hired Teleca AB to create the interlock protocol that keeps Blad bodies from operating with "unapproved" digital backs such as Phase One."

I'm not sure how I could have been any more specific.

Direct link | Posted on Jun 10, 2014 at 01:06 UTC

It may be too little, too late, but in January, Blad's owners got rid of Dr. Larry Hansen, the guy who discontinued the V system, launched the Lunar, Stellar, and Solar, launched the Hasselblad botique store in Tokyo, set up Blad's Luca Alessandrin as the head of Blad's new design center in Italy, and set up this deal with Vertu.

Replacing him is Ian Rawcliffe, who so far has launched the CMOS digital back their first actual new medium format product since around 2005, and supposedly shut down the Italian design center and given Luca the old glutal boot.

Direct link | Posted on Jun 8, 2014 at 06:08 UTC as 2nd comment
In reply to:

masticina: Daring and well for the rich it is a status symbol. At least this one doesn't looks horribly wrong! Because it is mostly a mobile phone with some more expensive materials used.

Yeah Hasselblad is pretty much dead.

Such a shame such a shame. Well I do hope for those who own a medium frame hasselblad that they will retain support for those as long as possible.

But yes where would they go after this.. an Hasselblad GoPro?
Rocky has a good point, Venture Capitalists don't care about your brand or product only that they get their moneys worth. And it seems that such is the end.

Well join the other big guys that failed.. end of the era. Begin of another this is how things go.

You are correct. A pretty aggressive outfit called Vorndran Mannheims Capital (formerly Ventizz Capital Fund) bought them from Shriro in 2011.

Rumor has it that the Blad purchase is scheduled for reevaluation on June 30, and the most likely outcome will be the shutdown and write-off of whatever is left of Blad.

The last time Blad was owned by VCs was back when cinven and UBS bought them back in 1996.

It's gone from bad to worse ever since. In 2003, the VCs sold Blad to Shriro, Blad's Asia-Pacific distributor. (Shriro is more well known for distributing back-hoes and cranes, they had no idea what to do with Blad, LOL).

Then VMC.

Direct link | Posted on Jun 8, 2014 at 05:36 UTC
In reply to:

MarcMedios: So... following Leica's journey from real camera to fashion accesory, Hasselblad --up until now the standard in large format photography-- has also become a fashion accesory and "certifies" cell phone cameras in an $11,000 cell phone. I don't know about the Swedes, but at least the Japanese had the inner strength to commit suicide when their dignity was lost.

No to your "no", LOL.

Modern Blads really are 100% rebadged Fujis. I researched this quite thoroughly, in response to the truly absurd claims of several Blad fans.

It's very easy to patent search the respective companies, and that will give you a pretty thorough list of the design staff of both. The sad truth is that UBS AG and CINven fired virtually every Blad engineer back in 1996 during their buyout of the financially crippled Hasselblad.

It's easy to discover that Fuji designed, patented, tooled, and built every last bit of the H system, with one tiny exception. Hasselblad hired Teleca AB to create the interlock protocol that keeps Blad bodies from operating with "unapproved" digital backs such as Phase One.

"Hasselblad" reacquired some electronics engineering capability back in 2004 when Blad's then owner, Shriro of Hong Kong bought Imacon and placed Blad's remaining assets under the control of Imacon management, but Fuji still did all the work on everything but digital backs

Direct link | Posted on Jun 8, 2014 at 05:19 UTC
In reply to:

MarcMedios: So... following Leica's journey from real camera to fashion accesory, Hasselblad --up until now the standard in large format photography-- has also become a fashion accesory and "certifies" cell phone cameras in an $11,000 cell phone. I don't know about the Swedes, but at least the Japanese had the inner strength to commit suicide when their dignity was lost.

The "core business, MF cameras" has just been repackaging Fuji medium format gear for the last decade or so.

Direct link | Posted on Jun 7, 2014 at 04:32 UTC
On Lost 1960s moon photos recovered from analog tapes article (43 comments in total)
In reply to:

bobbarber: What strikes me, as a guy who was alive back then, is that we went to the moon in the first place. No, we didn't have cell phones, and the only computer in school was a massive apparatus in its own room which you had to program with terse text commands. But we weren't quite as backwards as it might appear to the current generation. Making it to the moon was a serious accomplishment. That, and the Beatles.

"The political arena is WORSE"

Remember Watergate, the JFK assassination, Nam, Kent State, the race riots of the 60s?

"Phone Bills are WORSE"

No, adjusted for inflation, they're not. My first phone line, back in 1976, cost $11 a month. That's $44.42, for either 50 or 100 local calls (can't remember which, but I do remember "local" was about 6 miles. Farther away was a "zone call". $$$)

Then there was "long distance"). My last cell phone bill shows 228 minutes of long distance. Back in 1976 when I got my first phone line, that would have been $45.60 just for the long distance. Adjusted for inflation, that's $184.

Today, $220 a month would get you unlimited phone, cable, internet, cell,and mobile data.

You have any idea what a mobile phone cost in those days?

Direct link | Posted on Apr 26, 2014 at 18:48 UTC
On Lytro announces Illum light field camera article (347 comments in total)
In reply to:

aliasfox: Sports is an obvious use case. Sports news is usually viewed on the web or newsprint, so 5MP is fine. With the Lytro, the photographer never has to wait for any kind of focusing - no PDAF, no CDAF, no focus lag whatsoever. As soon as Lebron jumps to make his basket, the photographer hits the shutter, focuses later for the perfect shot every time.

With light field, it should be possible to imitate a FF camera at F/2.8 - set the lens at 85mm equivalent and get FF style portraits anytime. An event photographer could use this to tweak images to clients' desires ("I want Mom over there to be in focus" or "Blur the background more, it's too distracting"). It essentially decouples the artistic (DoF) from the exposure (aperture) equation.

Obviously, neither of these are necessarily common use cases, and this field (no pun intended) still has a ways to go. But if they keep developing it, who knows. In 3-4 years we might have a high ISO, fast shooting FF model with 120 MR/16MP output.

"With the Lytro, the photographer never has to wait for any kind of focusing - no PDAF, no CDAF, no focus lag whatsoever."

And yet, the first Lytro had a focusing mechanism. A particularly slow and poorly performing one, at that.

You don't get an infinite range of refocusing. You get in the DOF range of an f16 equivalent, and can then move a narrower (f5.6 equivalent) DOF within that f16 range.

Since you brought up sports, let's shoot that lens at the 250mm equivalent long end. Say your subject is at 50 feet. If you nail the autofocus (something the old Lytro seldom could do), you can now refocus over the range from 44.8-55.6 feet. Not an inch more.

Direct link | Posted on Apr 23, 2014 at 05:59 UTC
On Lytro announces Illum light field camera article (347 comments in total)
In reply to:

AbrasiveReducer: For many years the emphasis was on getting everything sharp (f/64 if need be). If the background was distracting, you found a better background. For the last few years, people want minimal depth of field, even using sharp and expensive tilt lenses to get Lensbaby results. So the Lytro makes perfect sense. You can have as much sharpness or blur as you like, and even assign the location.

With focus no longer an issue and exposure both automatic and extended by HDR, the only thing that remains is for the camera to choose the subject and time of day.

No, you can't. With the lens array they have, information outside the focus range of the decimated array is simply gone. You can refocus a zone of f5.6 equivalent DOF anywhere within the f16 range of DOF where you actually have information. That's all.

Direct link | Posted on Apr 23, 2014 at 05:53 UTC
On Lytro announces Illum light field camera article (347 comments in total)
In reply to:

MASTERPPA: Here is my question. Can you make a image with it, that everything is in focus (within the range that is) Can you do macro with it? See where I am going here? For macro, this camera would be awesome.. No more macro focus rails..

Roland understands. ;)

Direct link | Posted on Apr 23, 2014 at 05:47 UTC
On Lytro announces Illum light field camera article (347 comments in total)
In reply to:

km25: The lens is faster then Sony's R10, but who makes it. How good is it? The LCD is a bit low res. The forty MP seems a lot for a 1" sensor. Even if it has a an F2 constant zoom lens, sound like it would noisy. It' s price tag is a high. It will appeal to the buyers who must have MPs at any cost.

*sigh* it does for a Lytro.

Direct link | Posted on Apr 23, 2014 at 05:43 UTC
On Lytro announces Illum light field camera article (347 comments in total)
In reply to:

Roland Karlsson: So - give me some facts! How many native pixels do the 1" sensor have? And how many "lytro" lenses do the camera have? That is all that counts.

Do the 1" sensor have 40 MP?

Do the camera have 5 million "lytro" lenses?

5 million pixels on a 40mp sensor would be a straight 8x decimation. That doesn't really work. 9x would work, a 3x3 matrix, but that's a final resolution of 4.4mp.

Makes sense to me. I figure the new camera has to have less than 5 million lenses, and is interpolating the picture back up to a higher resolution. Hard to get caught doing that at 4.4mp, unless someone examines the raw files. 3x3 would get the DOF range variable between over f5.4-f16 equivalent range.

Direct link | Posted on Apr 23, 2014 at 05:42 UTC
On Lytro announces Illum light field camera article (347 comments in total)
In reply to:

falconeyes: I am going to write a blog article about this. I figured out that Lytro light field and Canon dual pixel are just special cases of a more generic class of subpixel sensor cameras. Neither Canon nor Lytro have hit the sweet spot yet though ...

A side effect may be that Canon's patent on dual pixel AF is void.

Moreover, it does probably mean that Canon's dual pixel AF causes diffraction problems at very high fstops. Something worth to be studied ;)

"A 9-pixel (3x3) grid underneath each microlens could give you horizontal, vertical, and diagonal AF sensors."

So could a 4 pixel (2x2) grid.

Direct link | Posted on Apr 23, 2014 at 05:30 UTC
In reply to:

0MitchAG: And what is the relevance to photography here? This is not longer battery life; a solar charger for this battery would be useful though.

Lars, are you pushing the 30 pound 1,500 W charger on a cart, or are you expecting StarBucks to start offering charging stations?

Direct link | Posted on Apr 12, 2014 at 02:15 UTC
In reply to:

badi: i looked on their website, and it seems that they work into image sensor improvements too. I couldn't find much details but their state is:
"Image sensors utilizing this technology are 5 times more sensitive than existing sensors." (about this so called nanodots technology).
That would be something, right? :)

Every such announcement of "dots", "nano" gadgets, or "quantum" something's that increase sensors has turned out to be a total misrepresentation.

Remember Graphene?

Direct link | Posted on Apr 12, 2014 at 02:11 UTC
In reply to:

Expat Nomad: Interesting research.

Begs the question though, in terms of smartphone use, why are phone makers under-designing battery capacity?

5 years ago, you had phones that lasted 7-9 days on a single charge. My arcane BB still lasts 3-4 under pretty heavy use.

I'd be more interested in gains in energy improvements (for example like those in miniaturization for medical devices) that allowed me to charge my battery less.

There are currently 122 processes running on my S4. The thing is never really "off".

Direct link | Posted on Apr 12, 2014 at 02:09 UTC
In reply to:

AbrasiveReducer: If this could be adapted to an electric car battery it would be really be something.

Indeed. A Tesla uses a 53 kilowatt-hour battery pack. That's 190 megajoules. A 26 second charge at 90% efficiency would require about 8 megawatts.

It would be something to see.

From a healthy distance.

Or a bunker.

Direct link | Posted on Apr 12, 2014 at 02:01 UTC
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