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: 615, showing: 341 – 360
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In reply to:

NancyP: kewl. Walk-in lens.....at least that beats the equivalent in my general line of work, the walk-through model COLON, a promo gimmick for colon cancer screening.

Flashback to Patrick Stewart and "the visible rectum" on SNL many years ago.

Link | Posted on Sep 7, 2012 at 21:48 UTC
In reply to:

offertonhatter: Nice lens and great focal length.
Anyone who has used a 55mm on film and APS-C (such as the Takumar 55mm range and the Mamiya 55mm) will have found it a great lens to use.

The only fly in the ointment for Zeiss is the plentyfull supply of Tak 55mm's M42 lenses out there, and with an adapter, work superbly on DSLR's. Even if most are F1.8 and F2
Still, they are producing mirrorless versions of them and on an EOS-M, MFT etc, will provide the tog a great versatile lens.

Kudos to Zeiss for bringing back this focal length back.

Great on APS., but not on FF.

Like some people like square formats, despite over 90% of photographers avoiding them like the plague. That's what 55mm and 58mm lenses are. All the camera companies tried them in the late 50s or early 60s, and they all failed.

Link | Posted on Sep 7, 2012 at 21:47 UTC
In reply to:

Baxter Bad: Only m4/3 and NEX are open spec, right? If so, isn't it likely those are the only systems Zeiss will support?

u43 is the most tightly locked down system of all.

I don't know if Sony will let Zeiss have Cosina make "Zeiss" E-mount lenses, when they already pay Zeiss for the name to put on lenses built elsewhere (I believe by Tamron).

I see this announcement as a response to Canon entering the mirrorless market, and Fuji expanding their offerings.

Link | Posted on Sep 7, 2012 at 21:44 UTC
In reply to:

JackM: 55 seems like a random number for full framers.

And how is the DSLR version distinct from the existing Planar 50/1.4?

It's a cursed number for full frame. From a physics standpoint, it's a "good" focal length. All the major camera companies made 55-58mm f1.4 lenses back in the late 50s or early 60s. It's the shortest length for a pure symmetrical f1.4 Planar or double Gauss on a FF SLR that needs to leave 39mm clear for a swinging mirror.

Photographers hated them, and stayed away in droves. It's an awkward focal length, too long to be a "normal", which is closer to 43mm for FF, and too long for a pleasing "telephoto effect". So, the camera companies "split the difference" and tried 50mm f1.4 designs. Optically, they're compromised, and inferior to 55-58mm offerings, but photography is about "photographs", not "image quality".

There was a resurgence in the 55-58mm length fueled by APS, where it's a pleasant 85mm equivalent. Voigtlander brought back a 58mm f1.4, Pentax a 55mm f1.4, and used Nikon 58mm f1.2 NOCT climbed to insane prices in the used market.

Promoting this as FF is pure fail.

Link | Posted on Sep 7, 2012 at 21:39 UTC
On article Canon announces EOS C100 professional video camera (99 comments in total)
In reply to:

Jogger: How come DPR did not post the Sony EA50 NEX camera that was just released. Not to mention the 18-200 power zoom. Maybe if they had issued a press release under the CANON name, they would have made it.

Considering that the top items on dpReview right now are the Sony NEX-5R announcement AND the dpReview hands on of same, I'd say your CANON "would have made it" conspiracy theory is indicative of some personal problems, which you really should not be airing in front of other people, especially in a large online community.

Link | Posted on Aug 29, 2012 at 15:32 UTC
In reply to:

Camediadude: To do before I croak: Watch a 4k movie (can you imagine a movie like say Avatar 2 in 4k, wow...)

Imagine, or remember?

The first Avatar was 4k.

Link | Posted on Aug 29, 2012 at 13:18 UTC
On article Canon announces EOS C100 professional video camera (99 comments in total)
In reply to:

shaocaholica: Most of the key feature list can be added in firmware to existing and future Canon DSLRs. Thousands of dollars for a measly few lines of code is not cool.

How do you add a faster processor with "a few lines of code"Q

It's the same price as a 1DX (hey, what happened to the "thousands of dollars"?) and it's faster. Cameras that do cost less than this one, like a 5D III, also have substantially less processing power.

C100 - 249 mp/s
1DX - 217 mp/s
5D III - 149 mp/s

Sorry, but it's your post that "is not cool".

Link | Posted on Aug 29, 2012 at 13:13 UTC
On article Canon announces EOS C100 professional video camera (99 comments in total)
In reply to:

dbo: Hm.
Sensor is fine.
FHD is ok, but only 30p?
SR 4:2:0?
SD cards only

7.999,- ?

Sorry, that's a bit too few features for too much bucks.

Are you complaining about the lack of CF, because that's not a "feature". It's a video camera. At the same speed, large SD cards cost less than half of what CF cards do, and you can easily fill 20 64 gig cards in a day's shooting. That much CF costs more than the camera.

And it's easier to deal with large numbers of SD cards.

There's the added bonus of being able to change cards in the field without worrying about a grain of sand in a CF card's connector breaking one of the 60 tiny pins in the camera's CF connector and disabling the camera.

Link | Posted on Aug 29, 2012 at 13:03 UTC
In reply to:

Birch_Tree: I always thought Android was a resource hungry operating system. Which would mean battery life, Performance or bulk would suffer. Probably better operating systems out there to use in a camera.

@Birch_Tree, you might want to look up what a "fact" is.

Link | Posted on Aug 22, 2012 at 13:37 UTC
In reply to:

RedMangrove: why does everyone want to call people with their camera?

Because people want to carry just one device. It's what killed the PDA market, and is starting to erode the nav market and the market for small gaming devices. It's why Swiss Army knives have sold so well for so long, and why Leatherman tool knockoffs abound.

It's what killed the camcorder market. Maybe the P&S cameras couldn't do video quite as well as a dedicated camcorder, but a vacationer wants to carry one device, not two; one charger, not two; one kind of media, not two; one case, not two...

The bigger question is, why did you even need to as that?

We'll defer for another day the fact that the S800c doesn't have GSM or CMDA transceivers and can't actually make a phone call.

Link | Posted on Aug 22, 2012 at 13:21 UTC
In reply to:

vFunct: At this point there should be no non-Android camera from now on.

What good is a camera that doesn't let you instantly publish your photos?

Not sure Apple would agree. And iOS is the best "smart device" platform to program imaging apps on.

And don't count out microsoft. They got a pretty big win with Nokia.

Link | Posted on Aug 22, 2012 at 05:38 UTC
In reply to:

Birch_Tree: I always thought Android was a resource hungry operating system. Which would mean battery life, Performance or bulk would suffer. Probably better operating systems out there to use in a camera.

It's really pretty efficient. Where did you grt the idea it wasn't ? That's just frutist propaganda.

Link | Posted on Aug 22, 2012 at 05:33 UTC

Third Android phone announcement. But unlike the polaroid SC1630 or Agio A8, this one is probably going to make it. I knew there was a reason I downloaded that Android SDK. This is going to be fun.

Link | Posted on Aug 22, 2012 at 05:31 UTC as 96th comment
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

AngryCorgi: This is probably a big deal to the 5 people who actually bought a Lytro.

@AC, More than 5 people bought them. I looked the other day, and 10 people were trying to unload "like new" Lytros on ebay. So, I would hope that they sold at least 11, and there's at least 1 person, somewhere, who likes theirs and is keeping it.

Link | Posted on Jul 27, 2012 at 13:51 UTC
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

guif: Sad sarcastic comments, tomorrow all cameras will be plenoptic ... Just as all cameras are now digital, back in the times the same stupid pepple were saying "that is not a camera yada ... Yada ... " and the same crowd cries after the performances of the new canikon toy ..

"Single-lens 3D could be created by automatically taking two exposures; the first recording data for one eye, and then the lenses reorganize to capture data for the 'second' eye."

You're failing to grasp a fundamental concept. You need to take those two exposures from locations fairly far from each other. For convincing 3D of things 6-10 feet away, that distance is approximately human eye spacing, around 60mm. The standard rule in 3D work is 30:1, you want to shoot 3D of action 20 feet away, you set the lenses up with a 200mm separation.

Lytro can already do as much ray selection as is possible behind its tiny lens. Problem is, with a 22mm lens, you've got the ability to create your "pair of eyes" 15mm apart, which is a fraction of what is needed for general photography. That's why the examples are shot so close.

There is good reason why humans do our 3D with two small eyes, instead of one giant eye the size of our faces.

Link | Posted on Jul 27, 2012 at 13:47 UTC
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

guif: Sad sarcastic comments, tomorrow all cameras will be plenoptic ... Just as all cameras are now digital, back in the times the same stupid pepple were saying "that is not a camera yada ... Yada ... " and the same crowd cries after the performances of the new canikon toy ..

"You continue to make the biggest, and worst assumption of all: that what is is what will be."

You continue to stuff words in my mouth, and it is most unpalatable. I commented on what is possible, given the physics of this particular universe.

"I'll I'm saying is that the technology technically exists"

You are incorrect. Your analogy with cloud-gel windows is false, because lenses do not scatter light, they redirect it. Your knowledge of history is incorrect: flat screens were quite common ten years ago in civilian use (they were more common back then, than your own smart windows example is today).

"you lack the ability to dream big. You lack creativity, Joseph-San."

Oh, jean-chan, you really have no idea who you're talking to. I have dreamed bigger than you ever will, and will continue to do so. You're without dreams of your own. You read a bit of highly skewed marketing literature, full of contrived demos, and think that breathing that second hand smoke is dreaming.

Link | Posted on Jul 27, 2012 at 13:33 UTC
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

guif: Sad sarcastic comments, tomorrow all cameras will be plenoptic ... Just as all cameras are now digital, back in the times the same stupid pepple were saying "that is not a camera yada ... Yada ... " and the same crowd cries after the performances of the new canikon toy ..

"I could come up with a long list of famous inventions for which there was no need, but sold like crazy. Flat-panel TVs..."

Flat panel TVs are an excellent example of an invention for which there is a massive need (space saving, weight saving, power saving, decreased cost, increased size, higher resolution, reduced radiation) so that pretty much defeats your argument. Are you aware of the decades of research that went on at places like Sarnoff or SRI to bring the microtip emitter plasma display to fruition? The billions pumped into LCDs by Sharp, NEC, or Samsung?

"But you'r assuming not only that this technology will never improve,"

No. I'm stating that it will not improve to the point where, as guif asserts "tomorrow all cameras will be plenoptic". Rather than stuff words in my mouth with your version of what I'm "assuming", why don't you read what I wrote?

You can't turn off microlenses (now, that's a massive assumption) so this will never be a general purpose camera.

Link | Posted on Jul 26, 2012 at 12:59 UTC
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

guif: Sad sarcastic comments, tomorrow all cameras will be plenoptic ... Just as all cameras are now digital, back in the times the same stupid pepple were saying "that is not a camera yada ... Yada ... " and the same crowd cries after the performances of the new canikon toy ..

jeangenie, poor little greenie, I've made no "massive assumptions". I've drawn from Ng's own published papers and my own knowledge of computational optics and volumetric algorithms.

"what if the second or third generations of these sensors could create single-lens 3D video?"

Now, that's a massive assumption. There is something in single perspective point 3D image processing called the occlusion problem, which means that you do not have the information needed to fill in what is occluded by foreground objects in one eye's view, but is not occluded in the other eye's view. Single point 3D looks contrived. You'll notice that most of the 3D examples you see presented by plenoptic researchers are at macro distances. At such distances, you can select rays to create a small stereobase multiple point view, but that base is limited to 1/2 the aperture diameter.

In short, the Lytro can make great 3D images, of stuff about 18 inches away.

Link | Posted on Jul 26, 2012 at 12:57 UTC
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

Peiasdf: Why a tripod? Long exposure night shot?

Like dpReview said when they reviewed it: "Explorable output tends to require contrived compositions."

Tripods are a natural part of a highly contrived style of photography.

They also pointed out its high ISO weakness, another reason you'd want a tripod.

Link | Posted on Jul 25, 2012 at 15:36 UTC
On article Lytro Light Field Camera now works with Windows (39 comments in total)
In reply to:

guif: Sad sarcastic comments, tomorrow all cameras will be plenoptic ... Just as all cameras are now digital, back in the times the same stupid pepple were saying "that is not a camera yada ... Yada ... " and the same crowd cries after the performances of the new canikon toy ..

I find it interesting that you went from saying "There is nothing inherently bad in his invention" to somehow counting it among "great inventions".

I'd define a "great invention" as one that provides a "great benefit". Ng's invention appears to be, at best, a novelty. I see no greatness in that. Yes, it has some great physics and great math, but all that greatness was directed towards a mediocre concept.

Oh, and as a physicist, you should understand the difference between "available technology" and physical limits. There will never be enough sensor resolution to make good on gulf's claim that "all cameras will be plenoptic". To say otherwise is to make what you called "dishonesting comments".

Now, if you believe that someone here, aside from gulf, and possibly yourself, has said something dishonest, then do what an ethical scientist is prepared to do, and provide a counter-argument.

Link | Posted on Jul 25, 2012 at 15:23 UTC
Total: 615, showing: 341 – 360
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