Karl Gnter Wnsch

Karl Gnter Wnsch

Lives in United States AK, United States
Works as a software developer
Joined on Jun 24, 2002

Comments

Total: 92, showing: 61 – 80
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On Nikon announces D4 'multi-media' DSLR article (231 comments in total)
In reply to:

Jonathan F/2: Great, now I gotta get new EN-EL18 batteries!

It seems that Nikons hands were forced as there is a new law in Japan regarding the contacts on high capacity batteries to prevent short circuits and their aftermath.

Direct link | Posted on Jan 6, 2012 at 08:38 UTC
On Nikon announces D4 'multi-media' DSLR article (231 comments in total)
In reply to:

tuckerfx98: I like the idea of a new improved memory card. The idea of a CF and tiny SD card in the same camera was silly.
Some of you may not work under cold winter conditions where handling an SD card is more than just a little awkward. Believe me SD should be buried for just that reason.
Well, may keep it around for "Granny" and her "PHD Camera" when she's on vacation in Hawaii.

The second slot is for the CF-Card successor, not a fiddly SD card with it's far inferior performance!

Direct link | Posted on Jan 6, 2012 at 08:36 UTC
On Olympus raided over accounting scandal article (83 comments in total)
In reply to:

Hide Takahashi: According to news at yahoo Japan, Sony,Panasonic and Fuji Film are fiercely
fighting to take over Olympus. Olympus medical equipments are already well known in the industry and now Sony is seriously considering to enter medical equipments business. Whoever succeeds in taking over Olympus,they will be in good hand.

"Whoever succeeds in taking over Olympus,they will be in good hand."
The only company of those that you claim are queuing on their doorstep for a takeover that would keep the camera business alive would be Panasonic. Sony would bury it (eliminating internal competition against their NEX line) and FujiFilm has lost the plot a long time back... The DSLR line would anyways be dead with any of the three.

Direct link | Posted on Dec 22, 2011 at 09:15 UTC
In reply to:

geo444: .

Sigma 17-50 F2.8 EX DC OS HSM Canon: 17 Elements, 13 Groups

Sigma 17-50 F2.8 EX DC HSM Pentax: 17 Elements, 13 Groups ??

... are the OS Elements Glued ?? :)

;)

It isn't economically feasible to produce different optical makeups, so yes, they simply have remove the sensors and micro motors that moved the OS group and fixed them in place.

Direct link | Posted on Dec 5, 2011 at 09:23 UTC

Why would anyone now buy this lens? The appeal of the lens was mainly in the optical stabilizer the predecessor had as it is more efficient than the built in stabilizers, reduced the overheating issue of the SLT cameras, stabilized the viewfinder, stabilized the image the autofocus works with - so now this lens is just another "Oh Sigma produces one of these as well..."

Direct link | Posted on Dec 3, 2011 at 07:26 UTC as 34th comment
In reply to:

Deleted17: Where I live, if they sell you land that is below sea level, you go to jail. What were they thinking?

It was an one off event. Just like the eventual breakup of one of the canary islands will be an one off event - which will destroy the whole eastern seaboard of the american continent up and including to the first mountain range exceeding 3000 feet - So you better start evacuating...

Direct link | Posted on Dec 2, 2011 at 08:58 UTC
On Adobe faces criticism for change of upgrade policy article (398 comments in total)
In reply to:

Archiver: I have two licenses for Lightroom 3 and have only activated one. I am saving the second for when I upgrade my home computer, which will save me the bother of deactivating and reactivating somewhere else.

Lightroom is the only program I have found that gives me the image quality and 'look' that I like; no other raw processor gives the same look and IQ of Lightroom. This rather ties me in to Lightroom and means I may eventually have to pay big bucks to upgrade in the future, unless another raw converter comes to the party.

Take a look at rawtherapee, it has evolved quite enormously in the past few months and has surpassed the results I got from LR in terms of quality...

Direct link | Posted on Nov 23, 2011 at 08:34 UTC
On 10 Photography Accessories for Under $250 article (62 comments in total)
In reply to:

Karl Gnter Wnsch: Sorry, but endorsing the Manfrotto metal garbage is making me think about how the Amazon purchase of this site has influenced the contents.
I had this tripod and it's stability wasn't something to write home about, the ability to dampen vibrations from say the mirror slap is virtually non existent. The main culprit (next to the too thin dimensioned legs) is the center column mount - to make this tripod usable this has to be removed completely (which is sort of an emergency measure supported by readily available parts). Even then it's too heavy for the performance it offers...

@Guidenet: I am quite sure. Manfrotto seems to source the clamps wherever they may get the best price. They range from bearable to unusable.
I since have replaced my tripod with Berlebach ones and they are faster to setup (and less painful may I add, getting the fingers caught in the Manfrotto clamps is really really painful and takes some time to heal), more silent, much more robust and less prone to require disassembly cleaning...

Direct link | Posted on Nov 20, 2011 at 17:57 UTC
On 10 Photography Accessories for Under $250 article (62 comments in total)
In reply to:

Karl Gnter Wnsch: Sorry, but endorsing the Manfrotto metal garbage is making me think about how the Amazon purchase of this site has influenced the contents.
I had this tripod and it's stability wasn't something to write home about, the ability to dampen vibrations from say the mirror slap is virtually non existent. The main culprit (next to the too thin dimensioned legs) is the center column mount - to make this tripod usable this has to be removed completely (which is sort of an emergency measure supported by readily available parts). Even then it's too heavy for the performance it offers...

@Guidenet, It's not the metal part (although it contributes to the problem), it's the way the center column is mounted - and the only way to get rid of it is 3rd party parts. Then there is the issue of the leg clamps on which I had the choice of tightening them to (well beyond) breaking point to get it to stand sturdily or to have them not hold the tripod. I more than once caught my fingers in them and in the end I dumped it (not sold, garbage collection).
I then bought myself a wood tripod of about the same price and weight, which is much more sturdy, no leg clamps to worry about and I still have that. The basic carbon fibre tripods from for example Feisol would be a much better choice but probably aren't an option for DPreview because of the tie ins with Amazon.
I buy lots of things through Amazon but would never limit my choice to their portfolio.

Direct link | Posted on Nov 20, 2011 at 12:39 UTC
On 10 Photography Accessories for Under $250 article (62 comments in total)

Sorry, but endorsing the Manfrotto metal garbage is making me think about how the Amazon purchase of this site has influenced the contents.
I had this tripod and it's stability wasn't something to write home about, the ability to dampen vibrations from say the mirror slap is virtually non existent. The main culprit (next to the too thin dimensioned legs) is the center column mount - to make this tripod usable this has to be removed completely (which is sort of an emergency measure supported by readily available parts). Even then it's too heavy for the performance it offers...

Direct link | Posted on Nov 20, 2011 at 09:03 UTC as 24th comment | 8 replies
On Roundup: Third-party Lenses for Enthusiasts article (169 comments in total)
In reply to:

Eugene Powers: Sigma 70-200mm F2.8 OS is very sharp without stopping down.
As far as weather sealing and focus limit a $3 plastic sleeve will do. Certainly better than Canon $1000 option for weather sealing. And I don't want to be focus limited while I forgot to switch it back. Happened to me and I missed the shot because lens would not focus. Sigma lens focuses very fast without focus limiting switch.

Sigma HSM is fast, Canon ring USM is faster - and with the help of the focus limiter switch it is much more usable in the field. You just need to know what you are doing...

Direct link | Posted on Nov 17, 2011 at 10:07 UTC
On NASA captures the earth at night with Nikon D3S article (159 comments in total)
In reply to:

Stollen1234: nice) imagine if these were taken with a canon camera..the colors and the clarity would be unsurpassed.

The only reason NASA prefers Nikon is that certain lenses in the Canon range use the optically superior fluorite elements - which NASA doesn't trust to survive the vibrations during vehicle launch...

Direct link | Posted on Nov 17, 2011 at 09:24 UTC
On Olympus executive dismissed amidst loss revelations article (98 comments in total)
In reply to:

calmwaters: This is a good time to buy Olympus shares.

Not if that was only the tip of the ice berg - which I fear it is. If there was insider trading of shares (as anything else IMHO wouldn't make sense without) then that could well be the end of Olympus as we know it today and they will go into the range of penny stocks faster than you can say "investigation"...

Direct link | Posted on Nov 8, 2011 at 14:07 UTC

I found the book highly enlightening (I was technical corrector for the German translation, so this book is available in German now as well).
I liked the idea that it's mostly about creating the correct light (and thus shadow) for the shot to look interesting. Although you might disagree with the style Syl Arena has, the basic premises of every shot do help to develop your own skills - and that's about the best thing a book can achieve. It's simply not about copying someone else (in this case Syl Arena) but to understand how to achieve certain looks and what is possible with the flash guns you have...
I for one understand his reluctance to endorse the ST-E2, a Speedlite 550EX (or newer) as a master simply is more flexible...

Direct link | Posted on Nov 7, 2011 at 11:16 UTC as 8th comment | 1 reply
On Canon announces seven EF Cinema lenses article (74 comments in total)
In reply to:

Eleson: When it comes to lens pricing, look at this video:
http://www.sonyalpharumors.com/.../sony-tidbits-nex-fs100-presentation-video/

It is a Sony video, but nevermind that, someway along the video, they remark that the same optical lens is sold in different costumes, and when dressed like a video lens the price goes up alot!
Having continous aperture, and not calling it aperture :) may not warrant the price difference.
Maybe that gives some insight into why manufacturers want to make these lenses. Lucrative! "Special needs " can be just empty sales talk at times ...

The T-stop is a much tighter constraint than the F-stop. It takes into account the transmission losses incurred by the lens elements and their (imperfect) coatings. The lens design on the zooms do have another constraint to facilitate zoom while filming: They have to be strictly parfocal, which makes life really hard for the engineers. This is reflected in the price these lenses cost.

Direct link | Posted on Nov 4, 2011 at 13:26 UTC
In reply to:

sfseng: Why is it still using the ugly external GPS, when Sony already started using build-in GPS for entry camera.

What if instead of GPS you'd want to use the more precise (and not dependant on the whims of the USA) Galileo? Canon could simply release a receiver for that.
The biggest problem though is the metal sealed shell of the camera - you have to get the antenna of either to the outside for it to work properly.

Direct link | Posted on Oct 18, 2011 at 07:53 UTC
In reply to:

tmy: wow, really impressive release.

good to see that they are even devoting a processor just for AF and metering. and finally some sense in not keeping on the relentless MP race, higher and higher.
quick and accurate focus matched with clean low light capability...a winning combination!
+ no doubt the HD video and speed speed and the rest!

Nikon better get some new kit out!

The dedicated AF processor has been a feature of the 1D series and recently the 7D - so it's nothing new.

Direct link | Posted on Oct 18, 2011 at 07:47 UTC

Hey, it's Sigma Germany - so it's not PC to use an Asian type of wood and it shows. Now if they had made it from German Oak then... it would probably look as ghastly but it would be the must have accessory for those Germans that go to Belgium to buy Oak furniture at discount prices.

Direct link | Posted on Oct 13, 2011 at 10:25 UTC as 91st comment
In reply to:

Karl Gnter Wnsch: Why the f/6.3 at the long end again - it's outside the working range for each and every AF sensor of cameras on which this lens could be mounted. So no matter what they did optically, they got their priorities seriously screwed up!

@RKGoth, wrong, f/5.6 is the limit that *all* current AF sensors of APS-C cameras have built into them with regard to full functionality. Break that limit with the lens and the penalties are incurred. There are only a few cameras (and none of them is an APS-C camera) that have a single line type sensor to work up to f/8 - the physics for phase detetion make designing such a sensor increasingly hard and still it will be less precise on a faster lens than a f/5.6 limited sensor would - so f/5.6 is the limit that applies to fully functional AF sensors, I have outlined what happens if the lens doesn't adhere to this limit: You lose both precision and reliability - those are hard physical limits!
It's like a fever, if your body is operating at 39°C instead of the normal 37°C your mental and physical performance is seriously compromised, at 42°C your life is in danger - f/6.3 is similar for the AF sensor to you having a slight fever, your capabilities are compromised!

Direct link | Posted on Oct 8, 2011 at 11:36 UTC
In reply to:

Karl Gnter Wnsch: Why the f/6.3 at the long end again - it's outside the working range for each and every AF sensor of cameras on which this lens could be mounted. So no matter what they did optically, they got their priorities seriously screwed up!

@vodanh1982: No, AF always operates at the widest aperture possible for the lens (and focal length if it's a variable aperture zoom lens). The lens is only stopped down to the selected aperture after focusing. That's why you have to give aperture control to the inept automatic on the Sony SLT cameras if you want to use AF in video or high speed series.

Direct link | Posted on Oct 8, 2011 at 06:55 UTC
Total: 92, showing: 61 – 80
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