Gaston Kessler

Joined on Dec 3, 2015

Comments

Total: 19, showing: 1 – 19
On article Laowa Argus 35mm F0.95 sample gallery (DPReview TV) (38 comments in total)

Love the pictures. There are better and worse lenses but it's always a joy looking at a gallery by Chris and Jordan

Link | Posted on Sep 12, 2021 at 12:05 UTC as 9th comment
In reply to:

Sam808: I think for scoring cameras, dpreview need to pick the best-in-class camera as a rederence for each category then set the scoring mark for others. For example, a MF for resolution or picture quality set to score 100 for reference. Another model for video quality, another one for AF performance, etc.

That would be great. It would even be exciting when a camera becomes "the new benchmark" in a given (or multiple) category. And it would reduce the amount of coments whining (or puzzled) about scores significantly.

Link | Posted on May 26, 2021 at 16:23 UTC
On article Fujifilm GFX 100S review (936 comments in total)
In reply to:

Ranger 9: “…the GFX has a sensor that's 68% larger than a full-frame sensor, which means it receives around 2/3EV more light when shot at the same exposure values as a full frame camera.” I read this kind of thing often,, but I still don't get it. Sure, if I have a 1-acre cornfield and my neighbor has a 2-acre cornfield, his field receives twice as much TOTAL light energy as my field, but the light energy PER UNIT AREA is exactly the same, no? And if we've planted at the same density, each of my corn plants is getting exactly the same amount of energy as each of his… they don't know which field they're in or how big it is. Are sensor photosites different? Do they take advantage of quantum entanglement to benefit from the light that strikes their distant neighbors?

If you mean that each GFX photosite is larger than a typical 36x24mm photosite and thus can absorb more energy per pixel, then I can understand that, but why not just say so — preferably with measurements?

@Richard Butler
I liked the cornfield example, because if you compare images taken with same lens, same distance but different senso sizes you end up comparing a full image to a crop of that image. Then the amount of light per unit area is what defines the brightness, noise, etc of a given "element within te image"
Shouldn't it be independant of the difference in sensor size?
Now, if you want to capture THE SAME IMAGE with same lens you have to step further away from the subject with the smaller sensor camera or use a wider lens from the same distance, and then there are other factors than "total light" defining brightness and noise in a given element within the image.
Is there anything I'm missing?

Link | Posted on Apr 29, 2021 at 21:31 UTC
In reply to:

Mikho: So Tokina officially got Fuji's AF protocols and support. Viltrox didn't.

Tokina price - Viltrox price = Fuji's license price.

33mm: $399 - $279 = $120
23mm: $449 - $329 = $120

Looks like Fuji's license is $120 per lens. Maybe a bit less considering Tokina would want to monetize its brand name with a margin higher than Viltrox gets. A company needs to have a margin after paying for a license. Hence, Chinese production to cut costs.

I don't think people should shame Tokina for the price. It's not Tokina's fault. I guess official Fuji support and protocols aren't free. And kudos to Viltrox for the results it achieves by reverse engineering Fuji's protocols.

@Richard Butler Yes, my bad. I did'n recall correctly what i had read in this article:
https://photographylife.com/zeiss-make-autofocus-dslr-lenses/amp

Link | Posted on Apr 14, 2021 at 11:25 UTC
In reply to:

Mikho: So Tokina officially got Fuji's AF protocols and support. Viltrox didn't.

Tokina price - Viltrox price = Fuji's license price.

33mm: $399 - $279 = $120
23mm: $449 - $329 = $120

Looks like Fuji's license is $120 per lens. Maybe a bit less considering Tokina would want to monetize its brand name with a margin higher than Viltrox gets. A company needs to have a margin after paying for a license. Hence, Chinese production to cut costs.

I don't think people should shame Tokina for the price. It's not Tokina's fault. I guess official Fuji support and protocols aren't free. And kudos to Viltrox for the results it achieves by reverse engineering Fuji's protocols.

I might be wrong, but somewhere, some time ago, i read that only japanese companies and/or japanese manufactured lenses (as Zeiss branded but Sony manufactured, or something like that) are allowed to AF for japanese branded DSLR cameras. I really don't know the details of this, but AFAIK it is consistent with reality. Mirrorles, on the other hand, seems to be under a different set of rules

Link | Posted on Apr 13, 2021 at 18:36 UTC
In reply to:

linux99: Wow!!

Imagine the Toneh you could get with this!!

This has the be the ULTIMATE for Depth of Field control - why would anyone buy Full Frame?

@linux99

"Based purely on size, the IQ4 150MP will receive 2.5x more total light (1.33 stops) with the same exposure settings than a full-frame sensor would"

it was there all along, in the main article. "total light" seems to be of supreme importance when discussing sensor size...

Link | Posted on Feb 25, 2021 at 16:43 UTC
On article Fujifilm GFX 100S review (936 comments in total)
In reply to:

mostlyboringphotog: "...which means it receives around 2/3EV more light when shot at the same exposure values as a full frame camera. "

EV (Exposure Value) is not a measure of more or less light. At most, with calibrated constants, EV can be used for illuminance measure (for "proper" exposure).
Moreover, with similar pixel density as a7R IV, both images viewed at 100%, will show similar noisiness.

What the 68% larger area for 102MP sensor provide is more resolution at the noise level of a7R IV, which is a better image, I agree. But the more light went to more resolution, not for more "exposure".

"...b, but it receives more total light, doesn't it?? "
-TN

Link | Posted on Jan 28, 2021 at 17:50 UTC
On article Fujifilm GFX 100S review (936 comments in total)
In reply to:

King of Song: Wow,
I thought yesterday was a big day, now this!!!

@Richmondthefish, ikr?

Link | Posted on Jan 28, 2021 at 17:39 UTC
In reply to:

Carol T: "Comments on this article may be moderated before they are made public. Please keep your contributions constructive and civil."

Filtering out all the sexism and misogyny? Can't much imagine what the issue would be otherwise, except most of the cranky old dudes on DPR hate videos and hate people not being dry as dust and boring.

God forbid someone posts sexist comments, may lightning strike those heretics down!!
Now seriously, moderators do an important job that's a little more complicated than "filtering out all the sexism and misogyny". As a matter of fact, a good moderator shouldn't filter out ALL comments of a certain type, unless those comments are meant to harm or extremely out of place.
I really wonder why you though this particular article required moderation regarding sexism and misoginy?

Link | Posted on Jan 25, 2021 at 14:08 UTC
On article Nikon Z 70-200mm F2.8 VR S sample gallery (166 comments in total)
In reply to:

RexTremendae: I would pay $900 for this lens based on these images.

haha! you seem to be in a rather good mood today, Mr Britton. I like that.

I'm just not the kind of guy you would be willing to meet in a dark alley though...

Link | Posted on Oct 7, 2020 at 01:25 UTC
On article Nikon Z 70-200mm F2.8 VR S sample gallery (166 comments in total)
In reply to:

RexTremendae: I would pay $900 for this lens based on these images.

@RexTremendae based on these images, you are being too generous.
This doesn't seem to be the proper way to display what a high end lens is capable of!

Link | Posted on Oct 6, 2020 at 22:55 UTC
On article Here's our wish list for the Nikon Z6 II and Z7 II (617 comments in total)
In reply to:

Yes BossMan: Come on NIKON, change the way we think, bring photographers some FRESH AIR!

Come up with a camera that turns everyone's head, A REAL MARVEL. Instead of inching along, trying to stay neck and neck with everyone else.

Be a LEADER, build a camera that gives your competitors sleepless nights. "Why didn't we think of that?" and "of that and that"? CREATE a "THAT" will separate NIKON from the rest of the herd. Make users think they can't live without "THAT NEW NIKON."

Make me want to switch to NIKON.

a Mark II camera sounds more like an incremental upgrade rather than something truly innovative. And that's not bad, considering how good the Z6 and Z7 already are

Link | Posted on Oct 6, 2020 at 01:50 UTC

A Sony article full of wishful Nikon people!

I really hope they come out with an FTZ mark II or something, some AF-D lenses are really worht it

Link | Posted on Sep 1, 2020 at 21:04 UTC as 53rd comment | 2 replies
In reply to:

Botifarro: :
All WR/sealed cameras will eventually leak if they are exposed to water for long enough. And when diving things get exponentially worse because the pressure basically forcefully gets the water inside.

However this all said on a pro-grade 10K camera so heavily marketed as fully weather sealed, I am a bit disappointed. A couple nice law suits against Fuji's claims should give hope that a next-gen GFX100 will be actually better built or at least that the weather proofing claims are bit more toned down.

What most people tend to forget is that weather sealing IS NOT EQUAL TO water proof. But lawyers know the difference, so suggesting a lawsuit is not a smart thing.

Link | Posted on Sep 1, 2020 at 12:12 UTC

OMG!
I knew there would be a bunch of "males" whining about sexism, i just didn't think there would be so many!
Just relax and buy whatever works for you and stop complaining about what gender the product is targeted at, unless you're jealous

Link | Posted on Sep 29, 2018 at 16:39 UTC as 35th comment
On article DxOMark Mobile report: Samsung Galaxy S6 Edge+ (17 comments in total)
In reply to:

bloodfire1004: DPReview, you should correct some of your statements in this article. Key statements below:

"With a DxOMark Mobile score of 87 the Samsung Galaxy S6 edge+ just snatches the smartphone camera crown from the Sony Xperia Z5 and places itself on top of the DxOMark smartphone rankings. "

"With a DxOMark Mobile score of 87 the Samsung Galaxy S6 edge+ is the new new number one in the DxOMark smartphone rankings, just outperforming Sony's Xperia Z5 by a whisker."

This is NOT entirely true as S6 Edge+ is TIED WITH THE Z5 for best mobile camera (both have 87 score). Though it should be interesting to note that if you take the average of photo (87) and video (85) of the S6 Edge+, it doesn't add up to 87 (172 / 2 = 86).

I know the new format might be misleading since we got used to looking only at the pictures, but please take the time to check properly before posting your articles. This should be done in the interest of fair and correct journalism.

Thanks!

agree

Xperia Z5 Photo 88, Galaxy s6 edge+ Photo 87
Xperia Z5 video 86, Galaxy s6 edge+ video 85

how come galaxy s6 edge+ is number 1???

Link | Posted on Dec 29, 2015 at 00:46 UTC
On article Sony a6000 Review (905 comments in total)
In reply to:

N13L5: I read this review and liked what I saw...
Started thinking of upgrading my Nex 5n body, since I already have three 'E' lenses, including the 50mm portrait lens, which I rather like.

But so, at the end of the review, I added the Nex5n to the comparison, and the comparison is rather mixed...

Especially the low light performance seems to have taken a hit!

Unless there's some technicality, that makes these comparisons not really work...

I really can't understand how a much further developed sensor of the same size could have significantly worse low light performance???

Anyone have an opinion on that?

some times performance is rated in a given time context: when rating "video mode", "features"or "Low light / high ISO performance" on a 2010 camera and it gets a 70% rating, a 2015 camera with the same performance wouldnt even get 40% as a new scale had to be adopted in order to keep the rating values on the chart.
I suggest you go to the review of the nex 5n, and compare the iso / noise performance side to side with the a6000. that will give you a better idea of the performance difference between the two models

Link | Posted on Dec 18, 2015 at 13:57 UTC
On article Nikon D750 Review (1978 comments in total)
In reply to:

LukeLT63: I still do not understand why the manufacturers of cameras integrate Wi-Fi into their bodies and not the GPS which I think for most photographers (especially naturalists, landscaping, street and holiday) is much more useful ... .I find it hard to think that the Wi-Fi is more required than GPS ...... I hope will have their right motivation market ...

The problem with GPS is that for it to work properly it constantly has to be working and then the battery drains. If you keep it off and turn it on when need it, it has to look for the satellites and this will take several minutes (usually 10-20 min to get them from a cold start). This makes the whole on-board GPS system unpractical.
with WiFi on the other hand, you can use the GPS info from your smart device to geotag the pictures you take (as smartphones get the satellite info through the data network instead of constant search, this is MUCH faster and reliable).

Link | Posted on Dec 16, 2015 at 15:30 UTC
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