TOF guy

Lives in United States USA, United States
Works as a Scientist
Joined on Nov 30, 2003

Comments

Total: 48, showing: 1 – 20
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On article Sony a7R III added to studio scene comparison (351 comments in total)

To me the recent batch of cameras are so close that high ISO performance is not what would decide me towards one brand or another

Link | Posted on Nov 18, 2017 at 13:46 UTC as 16th comment | 2 replies
In reply to:

RedFox88: ...and there goes "short attention span " sony onto another "thing".

Why wouldn't they since Canon does not seem in a hurry to catch up on sensor technology. At the rate it's going Sony will still be ahead 10 years from now even if they had zero R&D

Link | Posted on Oct 26, 2017 at 01:39 UTC
On article Nikon D850 Review (2115 comments in total)
In reply to:

mpb002: It is not just about the camera. It is also the camera ecosystem. Nikon can't match the color rendition of a Nikon/Sony sensor. Even more, Canon lenses are unmatched. Why do you think more photojournalists and sports shooters still use Canon? If it was all about dymamic range, you would see more Canon users switch. Good photographers know its more than a cameras sensor that produces and great photo.

According to lens rental the best 24-70 f2.8 and 70-200 f2.8 are made by Nikon. They are also more recent than the Canon equivalent and I'm sure Canon will match or exceed the Nikon in due time because manufacturers constantly leapfrog one each other , but for the time being your statement about Canon's lens .being unmatched is... unmatched by reality

Link | Posted on Sep 12, 2017 at 01:19 UTC
On article Nikon D850 Review (2115 comments in total)
In reply to:

yoms: @DPReview team, thanks for this analysis :) Appreciated.

To my opinion Nikon's real issue isn't OSPDAF but their lenses.
- Wide-angle zooms are old and not performing so well, no16-35mm f/2.8,
- Primes... 35mm f/1.4 has not been updated as Canon did after Sigma released their first Art. Was it really more important to release a nice 28mm before the so frequently used 35mm?
- New 24-70mm being a lesser performer than the former one, 24-120 f/4... no comment,
- Etc.

Now they do have nice f/1.8 lenses. The new 105mm f/1.4 and the latest 70-200mm performs admirably despite steep prices. Well all that doesn't make a great lineup to my opinion.

In a perfect world we would have Canon's L glass for Nikon mount :-)

For people not tied to a brand, It's not about Canon 5D IV vs Nikon D850 (Nikon wins this one, period) nor is it about Canon glass vs Nikon glass (Canon wins this one, period). The real battle is Canon lenses vs Nikon D850. And well, I'm clueless as for this...

You should check the lens rentals results on the latest Nikon 24-70 f2.8 , they completely disagree with what you say
Of course manufacturers leapfrog one each other all the time so these results can change but in the meantime the best 24-70 f2.8 is a Nikon ...

Link | Posted on Sep 12, 2017 at 01:10 UTC
In reply to:

TOF guy: What is outlined in the article also explains why Nikon's "visually lossy" compression is effective (and better than switching to 12bir).

That's the point : when digits are saved corresponding to data which is drown in noise, no actual information is saved, only noise.
In fact these digits are random.

Link | Posted on Sep 3, 2017 at 23:02 UTC
In reply to:

TOF guy: What is outlined in the article also explains why Nikon's "visually lossy" compression is effective (and better than switching to 12bir).

Keeping the noise "to a consistent resolution" will not help noise reduction. If it were it would be easy to restore the NR effectiveness by reconstructing more bits using a random number generator. Same results.
Disk space : about 10% savings visually lossless compared to lossless (depends on the picture, so my estimate can be off), while switching from 14 lossless to 12 lossless about double that. But the latter actually loses information for small recorded numbers (dark areas). No free lunch.

Link | Posted on Sep 3, 2017 at 15:24 UTC
In reply to:

TOF guy: What is outlined in the article also explains why Nikon's "visually lossy" compression is effective (and better than switching to 12bir).

It is arguable that lossless compression offer higher quality than lossy compression as implemented by Nikon because as Richard explains all the extra bits used in lossless compression compared to Nikon's visually lossless store only noise.

Link | Posted on Sep 2, 2017 at 14:05 UTC
In reply to:

TOF guy: What is outlined in the article also explains why Nikon's "visually lossy" compression is effective (and better than switching to 12bir).

"Visually lossless": indeed. Sorry for the mistake.

Link | Posted on Sep 1, 2017 at 23:44 UTC

What is outlined in the article also explains why Nikon's "visually lossy" compression is effective (and better than switching to 12bir).

Link | Posted on Sep 1, 2017 at 21:54 UTC as 54th comment | 13 replies
On article Nikon announces development of D850 (538 comments in total)

Thank you, Nikon, and Happy Birthday !

Link | Posted on Jul 25, 2017 at 15:42 UTC as 61st comment
On article Nikon announces development of D850 (538 comments in total)
In reply to:

surlezi: As Youtube announcement video offers 1440p and not just 1080p, and as it is shot "exclusively with D850" we can conclude that D850 at least offers 1440p.
However, they point out that the camera will be able to provide 4K timelapses, which could also mean it won't provide 4K video...

Didn't the ad state "8K time lapses" and not 4K

Link | Posted on Jul 25, 2017 at 15:36 UTC

They should make a version with an AA filter

Link | Posted on Apr 2, 2017 at 17:38 UTC as 4th comment
On article Gear of the Year 2016 - Barney's choice: Nikon D500 (217 comments in total)
In reply to:

osv: the d500 is in something like 55th place in the dxo sensor rankings, when sorted by iso sports performance.

so maybe the title of this article should be, "gear of the year 2016 if all that matters is af"? but then when i look at the 100-500 photos, i don't even see that... the cat yawning for example is a nice composition, but it's oof... a couple of the bird shots looked like they hit the mark, tho.

It's #7 among cameras with same sensor size with the best camera a whopping 3 points (87 vs 84) above the d500 score :-)

Link | Posted on Dec 19, 2016 at 22:07 UTC
On article Teardown reveals Sony image sensors in iPhone 7 (199 comments in total)

Looking at his comparison:
http://www.cnet.com/special-reports/cameras-compared-iphone-7-plus-vs-galaxy-s7-vs-iphone-6s-plus/#7-vs-galaxyS7
I do not see where using a Sony or Samsung (or whatever sensor manufacturer Samsung uses) sensor makes a difference. The colors are very similar and the differences are mostly about differences in exposure. They (IP7+ IP6s+ or S7) can take good photos in good light, pretty much of similar quality.
Does any of these have any support for raw (I've read somewhere the IP7+ does, not sure) ? Now *that* is a significant advantage?

Link | Posted on Sep 25, 2016 at 18:26 UTC as 24th comment | 4 replies
On article Teardown reveals Sony image sensors in iPhone 7 (199 comments in total)
In reply to:

cosinaphile: from forbes..

"But two nasty surprises have been discovered which may cause owners of the iPhone 7 to regret their purchase…
Apple has ditched its premium sapphire glass both the new home button & lens:

The revelation comes after JerryRigEverything used tools to determine makeup of surfaces on the Mohs’ scale of mineral hardness. Previously his tests on the iPhone 6S confirmed the presence of sapphire, but this time both the new home button and larger camera of the iPhone 7 scratched easily using picks that do not damage sapphire.
He concludes: “we know for sure that it is regular glass and not sapphire.”

And here’s where it gets interesting, Apple still advertises that both the iPhone 7 &iPhone 7 Plus as using sapphire ( considerably more expensive than toughened glass) on the home button & camera lens. Given the new iPhones are marketed as more durable than ever this would be a major let down. I have put these claims to Apple will update when/if the company responds."

Is there a difference for the main screen ?

Link | Posted on Sep 25, 2016 at 18:18 UTC
On article Rock Solid: Canon 1D X Mark II Review (453 comments in total)

Looking at the images of the rodeo show, they are *all* a miss.

The goal is to capture the action of the bull trying to throw away the rider.

The image must therefore show the bull rearing or bucking. The worse of the 3 shots in this regard is the one where the bull has all legs pretty much touching the ground , showing the less dynamic of the action. That's the middle one which Dpreview call "just right" (in facr as far as capturing the bull's motions it is "just wrong"). The last shot is nearly as bad but for different reasons, I'll add the poor rider's pose to Dpreview's comments. The first one is the best, too bad about the rider's hand.
But none is a keeper.

Link | Posted on Jul 27, 2016 at 15:51 UTC as 121st comment | 5 replies
On article Under pressure: Canon vs. Nikon in a hydraulic press (286 comments in total)

Thank you for the chuckle !

Link | Posted on Jul 9, 2016 at 16:36 UTC as 32nd comment

Very sorry to read of his passing. My condolences to his family.

Link | Posted on May 22, 2016 at 01:26 UTC as 17th comment
On article Hands-on with the Nikon D5 (406 comments in total)
In reply to:

Frank_BR: When I see a camera like this, I can't help but think on why Nikon does not use a square 30 x 30mm sensor, which has diagonal equal to 42,4mm and so is perfectly compatible with the existing FX lenses. The use of a square sensor would eliminate all duplication of controls I see in this camera, would make the operation much simpler (and faster!), and certainly would decrease the size and weight.

Within the format 30 x 30mm there is a 24 x 30mm format, both in portrait and landscape orientation. The format 24 x 30mm is not much smaller than 24 x 36mm, which is often cropped in practice. In a camera for sport, the resolution is not so important, but if the sensor density is kept the same of the current sensor, the resolution of the 24 x 30mm format would be respectable 17.5 MP, which is greater, for example, than 16 MP of the Nikon D4. Finally, the square format has its own merits because many subjets benefit great from a square composition.

Personally I favor a round sensor.
J/K !

Link | Posted on Jan 14, 2016 at 01:34 UTC
On article Happy Holidays from dpreview! (117 comments in total)

Thank you for all the hard work. Looking forward to enjoy the results.

Happy New Year to all

Thierry

Link | Posted on Jan 2, 2016 at 23:52 UTC as 6th comment
Total: 48, showing: 1 – 20
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