Joseph S Wisniewski

Lives in United States Detroit, MI, United States
Works as a Speech and sensor scientist
Has a website at
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.


Total: 660, showing: 21 – 40
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On article iPhone SE is a compact-sized iPhone 6s (184 comments in total)
In reply to:

timo: The right move. Those big phones are hopeless if you want to carry them around in your trouser pocket. The occasions when I really need a larger screen are rare.

I've noticed that the bigger phones, like an iPhone 6s+ or a Galaxy Note 4 actually feel smaller and more comfortable in the pocket than smaller phones.

The small ones always turn sideways, the big ones stay upright. I learned about this paradox shoving my work iPhone 6s+ in my pocket and noting that it actually felt more comfortable than my smaller Galaxy S4. My S7 edge should be arriving soon: I'm hoping it's large enough to feel small.

Link | Posted on Mar 22, 2016 at 03:55 UTC
In reply to:

Lars V: The question on my mind is, does the True Tone technology solve an actual problem, or does it create more problems (comparing two displays next to each other with different automatic whitepoint etc)?
Looking forward to hearing about actual experiences, here and elsewhere.

You've never had the misfortune of owning a phone or tablet with a white bezel. Half my dev phones are white, and it's a bloody nightmare (all my personal devices are a nice, sane black).

Every phone or tablet with a white bezel looks horrible. The bezel reflects the ambient white (2700K, 3200K, and 4300K seem to be popular indoors these days) while the display illuminates at an entirely different white point (for reasons unknown, often slightly warmer than daylight, up around 6000K).

The brain sets its white point somewhere in between (variably, depending on how interested it is in whatever is on the display) and the end result is that the display looks too cool, and the white bezel looks old and yellowed.

If they did this True Tone thing right, the display should match the bezel, and white will be white!

There's more detail in my post above yours.

Link | Posted on Mar 22, 2016 at 03:40 UTC

The "true tone" sensors will do something very important, adjust the display white point to match the environment. It won't really help too much with image viewing or processing, but it will keep white iPads from looking so horrid.

Hopefully, we'll be seeing this on the iPhone 7 soon.

I cringe whenever I have to use a white iPhone, because my lab is about 4300K and the iPhone white point is somewhere around 5800K, and when you concentrate on the display, the bezel looks so dingy yellow, like a piece of 25-year-old plastic.

I've always thought that was the reason Samsung doesn't make white phones or tablets any more.

Link | Posted on Mar 22, 2016 at 03:30 UTC as 34th comment
In reply to:

Old Cameras: I think they watched the Bourne identity series before coming up with these names. Blackstone and firefly sound like black ops.

Ah, Blackstone.

The magician who used to hawk "TV Magic Cards".

Link | Posted on Mar 22, 2016 at 03:23 UTC

A coating that reduces color aberrations?

Link | Posted on Mar 22, 2016 at 03:21 UTC as 30th comment | 1 reply
In reply to:

Rod McD: Time for some honesty. Flash manufacturers are taking more liberties with naming conventions to market their products..... It only has a GN of 44(m) when used with a 105mm lens. It would be far more useful to know what the GN is when it's used with a normal lens. Flashes usually used to be specified with a 35mm lens (on FF) and a second figure for what ever angle their WA diffuser covered. I'd bet that it's actual GN is more like 27-30 with a 35mm lens. It's not even in the spec sheet on Metz's website.

"Some Germany companies are not liking the old/good Germany anymore."

Metz has had that sort of problems for at least a decade. Icky "popping" blue whites because they left off UV filtering to get an extra 2% of guide number. Ergonomics from hell. I remember helping a friend get a refund on a Metz because the promised adapter didn't come out after a solid year's wait. Then there was the macro flash that they called "ring form". Looked like a ring light, priced like a ring light, but lit like a small, off-axis strobe.

Companies like Metz helped bring down the old German reputation for quality.

Link | Posted on Jan 14, 2016 at 02:19 UTC

An LED instead of RF excitation of the xenon tube.

Congratulations, Metz, for setting technology back a few years.

Link | Posted on Jan 14, 2016 at 02:15 UTC as 4th comment
In reply to:

Tal Shachar: so the public can't buy the camera because they (Pentax) are afraid we will use infrared to shoot through clothes?


Link | Posted on Dec 9, 2015 at 02:29 UTC
In reply to:

backayonder: Why Pentax think that anyone would buy this camera to shoot nudes is ridiculous. A far far cheaper option is a bunch of flowers and an expensive restaurant. And make sure the other party is agreeable too.

That word doesn't mean what you think it does.

Link | Posted on Dec 9, 2015 at 02:26 UTC
In reply to:

Roland Karlsson: Just to be sure. Have anyone checked that the real reason for Pentax to not sell IR cameras to public is that it is considered a danger to privacy, i.e. that it is see through?

Exactly, Roland.

We call it the "Sony lesson". You remember the crowds of angry mothers smashing and burning Sony video gear because the "x-ray cameras" might see someone's pubic hair through a bathing suit.

Same situation as the IR Fuji cameras, which Fuji only sold through law enforcement distributors.

As far as Sigma, they'd kill to get the same sort of bad publicity that caused such problems for Sony. It's one thing when you have one of the world's most recognized brands, and another when people say "Sigma? They make a camera?"

Link | Posted on Dec 9, 2015 at 02:14 UTC
In reply to:

LJ - Eljot: Can someone describe in wich way the lack of live view makes a camera cheaper?

Obviously, it doesn't make anything cheaper. This is a classic example of "defeaturing" something through software.

Link | Posted on Nov 20, 2015 at 00:55 UTC

Wow, "crippleware" from Leica. Who'd have thought we'd see this day.

Link | Posted on Nov 20, 2015 at 00:52 UTC as 59th comment
In reply to:

Bernard Carns: DJII will now offer a version with wooden propellers, and the Hasselblad logo laser scribed on the wood.


Yep, the Lunar will be joined by the Coptar...

Link | Posted on Nov 7, 2015 at 00:13 UTC
In reply to:

falconeyes: @Brittany Hillen:
> Sans an adapter

I read "Sans" is archaic and used by foreign speakers more than native speakers. It is French for without. Also in this thread, I see this word causes quite some confusion.

My question: Did you use this word for a reason, came it natural for you, or thinking about it now, would you use 'without' instead?

Are you a native speaker, US or UK?

I ask because I am curious to learn about the language. My native language is German.

@Richard, "Celtic" has absolutely nothing to do with English. You're confusing Celtic with Germanic.

Have a look at a typical Indo-European language tree.

As far as that uncalled-for and insulting "four-letter, one-syllable words like 'rock,' 'hand', and 'meat.'" comment, Old English was a highly sophisticated language with a lexicon of tens of thousands of words, most of them multi-syllable, with very few borrowed words, and with a growing body of literature, when the Roman Empire started to influence it around 450AD. Even then, that influence was largely limited to the adoption of the Roman alphabet, which was much more suitable to parchment and ink than the runes of Old English.

This doesn't look much like someone talking about rocks and meat in monosyllables, does it?

Link | Posted on Oct 11, 2015 at 18:43 UTC
In reply to:

photomedium: I found the comment section here to be populated by a bunch of idiots with very short term memory. This diatribe about Brittany's use of the word 'sans' is far from a one off case, but is rather the norm. Maybe this is the result of too strict moderation policy or a case of temporary stupidity induced by excessive pixel peeping?!? I don't know. These comments are not clever and are not funny.

> Alas dynaxx, you appear to be the genuine article.

He is a genuine troll. Check out his posting history. His only purpose in this discussion is to cause trouble and prolong the argument. This site would better sans his ilk.

Link | Posted on Oct 11, 2015 at 18:17 UTC
In reply to:

mr.izo: only problem with these classical design range finder lenses (beside af obviously), is their short flange distance. this does helps build smaller footprint lenses and all that, but on the other hand shows problems with aberations, corner sharpness etc, which was proved many times using these lenses on mrl ff cameras. yes, they can have super sharp center sharpness, distinctive micro contrast and all that, but for some serious wide angle work (architecture, landscape, interiors..) i would be careful and check things first..
i forgot: usually, also min. focus distance is bigger on rf lenses, that can be very limited sometimes.

> min. focus distance is bigger on rf lenses, that can be very limited sometimes

I wouldn't worry. That's not a characteristic of the lenses themselves, it's a characteristic of the Leica M rangefinder system. The rangefinder on an M focuses down to 0.7m. The Nikon mount Voigtlander 20mm focuses down to 0.22mm.

I expect to see these new lenses in longer focusing mounts, too.

Link | Posted on Oct 11, 2015 at 18:10 UTC
In reply to:

SKPhoto12: Why 3 lenses with such close focal length? I don't understand the brand logic. One step back or two forward will cover that focal length. Why not market one lens with 12mm focal length? Provide all the electronics and I think it would sell better than the almost finished product.

> One step back or two forward will cover that focal length.

Ultrawides are most commonly used for architectural or landscape photography. One step back or two forward will do...

absolutely nothing.

I still remember the last words of my mentor, as we were photographing canyons in Arizona.

Zoom with your feeeeeeeeeeeeeeeeeeeeeeeeeeee...

And if you're framing a close subject and want an expansive background (because even ultrawides have uses in people photography) then for the same subject framing, the 10mm will include 2.25x as much background area as the 15mm.

"Such close focal length" indeed.

Link | Posted on Oct 11, 2015 at 17:58 UTC
In reply to:

SKPhoto12: Why 3 lenses with such close focal length? I don't understand the brand logic. One step back or two forward will cover that focal length. Why not market one lens with 12mm focal length? Provide all the electronics and I think it would sell better than the almost finished product.

They're not "close".
* 12mm is 20% longer than 10mm
* 15mm is 25% longer than 12mm

20-25% is "huge" in focal length changes.

Look at some other common focal lengths.
* 58mm is 17% longer than 50mm (both Nikon and Cosina make both 50mm and 58mm lenses)
* 28mm is 17% longer than 24mm (both Nikon and Cosina make both 24mm and 28mm lenses)
* 35mm is 25% longer than 28mm (Nikon, Cosina, Leica, and probably a lot of others all make both 28mm and 35mm lenses)
* 100mm is 17% longer than 85mm, 105mm is 24% longer than 85mm. Nikon, Canon, Sony, Zeiss, and probably a lot more all have an 85mm and either a 100mm or 105mm.

Link | Posted on Oct 11, 2015 at 17:42 UTC
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