TOF guy

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

Comments

Total: 36, showing: 1 – 20
« First‹ Previous12Next ›Last »
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 (198 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 23rd comment | 4 replies
On article Teardown reveals Sony image sensors in iPhone 7 (198 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 (445 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 119th comment | 5 replies
On article Under pressure: Canon vs. Nikon in a hydraulic press (287 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 (409 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! (118 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 5th comment

This a commendable move by Nikon. Never too late to do the right thing.
But this is not enough if Nikon wants its reputation back. The many early D800 adopters with mis-calibrated AF sensor are left behind. Nikon needs to address this issue as well.

Link | Posted on Feb 27, 2014 at 21:49 UTC as 42nd comment | 1 reply

I applaud Adobe's efforts to address our complains. But this new iteration - while definitely better - still falls short of the mark.
The main issues that people have with the new system are:
- They don't want to lose the user license to the updates if they stop paying
- They also want the ability to discontinue, then at some point come back without paying full price.
These issues can be fixed. For instance say a user pays the monthly fee during an entire calendar year, then he can continue using the end of year version forever. If he stops the subscribing, he will have to commit anew to a one year subscription to get the discount price (the yearly cost of this subscription is about that of the upgrade in the old system so we're back to an expense similar to what it used to be before CC).

Link | Posted on Sep 9, 2013 at 02:16 UTC as 53rd comment
On article Just posted: Nikon D5200 in-depth review (231 comments in total)

Thank you for another well done review.
Looks like a good performance camera and great value. But Nikon should be dinged for not offering Mirror Lock-Up at this level. It should be added to the cons list.
After the recent QC issues which Nikon has experienced, have you checked the Af accuracy (no back focus with any af sensor) ? How about dust / debris ? A lot of potential buyers would like to know if these issues in newly released cameras are in the past.

Link | Posted on May 16, 2013 at 23:10 UTC as 42nd comment | 3 replies
On article Happy Holidays from dpreview (105 comments in total)

Happy Holidays and Happy New Year to the dpreview staff! Keep up the good work.

Link | Posted on Dec 25, 2012 at 19:25 UTC as 45th comment
On article Nikon marks production of 75 millionth Nikkor lens (81 comments in total)
In reply to:

Abhijith Kannankavil: Aren't they gonna celebrate it with new models, discounts n other stuff?

Finally a comment to the news I can relate to.
+1 on discounts.
New lens announcements would be nice too.

Link | Posted on Dec 20, 2012 at 04:07 UTC
On photo ISO-51200-IMG_0065 in dpreview review samples's photo gallery (3 comments in total)

This is impressive high ISO performance - even 25600 is useful for more than snapshots
The new 24-70 seems promising too.

Link | Posted on Nov 20, 2012 at 02:43 UTC as 3rd comment
On a photo in the Canon EOS 6D Beta preview samples gallery sample gallery (3 comments in total)

This is impressive high ISO performance - even 25600 is useful for more than snapshots
The new 24-70 seems promising too.

Link | Posted on Nov 20, 2012 at 02:43 UTC as 3rd comment
On article Hands-on with the AF-S Nikkor 70-200mm f/4G ED VR (259 comments in total)
In reply to:

Saffron_Blaze: The 70-300 was often reported as good as the 70-200 in that range. How will this be any advancement given the cost differential?

Whoever reported the 70-300 to be as good as the 70-200 should ease on the beer. The 70-200 is sharper, has noticeably more contrast, has better bokeh and is faster.The built is more solid as well. On the other end it is heavy expensive less versatile for its zoom range. Each one has its uses and strengths.

Link | Posted on Oct 27, 2012 at 15:51 UTC

Thank you Adobe for this initiative. I hope Adobe will continue in this regard and have a look at how Biking does lossy compression. The pixels values are rounded only in mid-tones and highlights. The differemces due to rounding are always kept much smaller than the unavoidable noise from counting statistics ("shot noise"). The storage savings are less but these is loss whatsoever in image quality.

Link | Posted on Oct 7, 2012 at 17:40 UTC as 10th comment

I've bought a very similar unit (actually probably the very same unit) from Cameta Camera in NYC for $59. It is advertized on their e-bay store. That includes shipping! The advantage (for us in the US) over ordering from HK is that the grip is shipped from a warehouse in the USA: it took 2 days to be delivered. Also Cameta camera is a good store with a good return policy. Pixel is probably okay but shipping back the accessory to HK would be more of an hassle.

Link | Posted on Aug 30, 2012 at 20:57 UTC as 33rd comment | 1 reply
On article Nikon issues firmware updates for D4 and D800/D800E (90 comments in total)
In reply to:

Red G8R: Does this apply to North American bodies too or should I wait for Nikon USA/Canada ?

You don't have to wait for Nikon USA or Canada.

Link | Posted on May 29, 2012 at 18:43 UTC

In my view this is the wrong way to approach B&W. The right way is to start with a color picture and convert it to B&W. It's so much more flexible that way, and therefore increase the artistic potential of the image.

With a color image one can convert to LAB and extracts the vision-wise sensible luminance channel. But one can do much more than that. Often a subject, say red, will stand out in color against the back ground, say greenery. But they may have similar luminance and therefore the subject will not stand out in B&W. This is clearly visible in many of the posted examples: they lack "separation" between various parts of the image (example sky against sea for the image of the Seattle needdle - fine image though in this case). It's easy to go around this issue when starting with a color image by mixing channels. The artistic possibilities are way beyond what a B&W camera can offer.
Or use filters with the B&W camera (no more noise benefit). IMO sorely missing in these images.

Link | Posted on May 13, 2012 at 03:14 UTC as 37th comment | 3 replies
Total: 36, showing: 1 – 20
« First‹ Previous12Next ›Last »