Vlad S

Lives in United States San Francisco, CA, United States
Works as a Scientist
Joined on May 11, 2010

Comments

Total: 427, showing: 1 – 20
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On article Venus Laowa 12mm F2.8 Zero-D sample gallery (117 comments in total)
In reply to:

AbrasiveReducer: This is making me nostalgic. A really wide lens without tons of barrel distortion. (This was the norm in the film era when there was no way to correct the distortion.)

Personally, I'd rather see more lenses with low distortion than more gold coatings and bubble-shaped bokeh, etc. And the bonus is when there is no distortion to correct, sharpness does not suffer from having to move all those pixels.

@p5freak most likely because there is a prejudice against software corrections. When micro 4/3 introduced such corrections as a standard on their lenses, there was a huge amount of outcry that the image quality was "fake".

Link | Posted on Dec 1, 2016 at 02:49 UTC
In reply to:

skanter: And why would I want a slide film look?

And why would it matter whether you want it or not?

Link | Posted on Nov 28, 2016 at 20:19 UTC
In reply to:

sharkcookie: Every week some scientists claim to have been making a breakthrough energy storage technology. Interestingly it is never ready for commercial use and no sample of the product is available.

Scientists work on the new energy technologies all the time, but the lab environment is more forgiving than the real world, so much of that tech does not survive once it's released into the wild. Nevertheless, progress is still being made: the NiMH rechargeable batteries were a huge improvement over the Ni–Cd, and the Li–ion batteries were another huge improvement on those; even the Li ion batteries themselves have seen a huge improvement in their useable life during the last 5 years or so.

Link | Posted on Nov 27, 2016 at 17:41 UTC
On article TIME releases 100 most influential images of all time (173 comments in total)
In reply to:

John Koch: The photos evoke places, events, and people of the past. Some of the images are striking, for assorted reasons. Others conjure nostalgia among Americans who bought the Time-Life magazines over the years. But, except for publication or award decisions, did any of the photos themselves influence or cause any actual events?

Missing: the 1962 U-2 photos of Russian missile sites in Cuba. This was perhaps the sole case where pictures affected potentially earth-frying decisions.

The linked web site actually explains in detail what influence every photograph had. I suggest you read the footnotes – they may expand your horizon too.

Link | Posted on Nov 20, 2016 at 21:59 UTC

I wonder what Phil Schiller uses to transfer his photos to his MacBook Pro.

Link | Posted on Nov 5, 2016 at 00:34 UTC as 111th comment | 4 replies
In reply to:

disraeli demon: I'm sure Panasonic know their market but instead of this I really wish we could have some good, sharp, reasonably- priced f2.8 14mm, 12mm and 10mm lenses with clutch focus.

What's so magical about f2.8? Why is 2.8 good enough, and f3.5 or f4 is not? If your creative vision includes low light, or the Milky Way shots, then 2.8 is not such a great option at all.

Link | Posted on Nov 5, 2016 at 00:27 UTC
In reply to:

CreeDo: Just out of curiosity, is VR video usually done with such an insanely wide field of view? If the goal is to provide a reality simulation, wouldn't it make more sense to use something closer to a normal human field of view?

The only difference between taking one or two ultra-wide angle shots and a bunch of "normal" shots is in having to stitch together the shots. The wider is the angle, the less stitching you have to do. Any projection distortions are corrected on the fly during display, so they have no bearing on the simulation being realistic.

Link | Posted on Oct 22, 2016 at 02:49 UTC
On article Photokina 2016: Olympus E-M1 Mark II overview video (295 comments in total)
In reply to:

Mlumiere: In general the new cameras have a term of technological life rather short, but very good lenses remain almost eternal, with a street value remains higher + more new used availability. I look first is the availability of lenses for a given camera format.

@obsolescence: for quite a while Olympus has been producing lenses that are optimized for video under the mark "MSC" (movie and still compatible). There's no need to buy new lenses.

Link | Posted on Sep 30, 2016 at 01:19 UTC
On article Photokina 2016: Olympus E-M1 Mark II overview video (295 comments in total)
In reply to:

Vlad S: When are we going to get 16 bit raw files?

@LJ - Eljot they are not "the last two" digits. You can represent any range – small or large – with any number of gradations. If you have a finer description of your data within the existing range, then the manipulation of this data will also produce more accurate results.

This is exactly what was observed when Nikon offered an option to record either 14 or 16 bit raw files: there was no difference in the OOC images, but as soon as you begin to manipulate images, the 16 bit immediately showed it's superiority.

Link | Posted on Sep 27, 2016 at 23:54 UTC
On article Photokina 2016: Olympus E-M1 Mark II overview video (295 comments in total)
In reply to:

Vlad S: When are we going to get 16 bit raw files?

The DR doesn't have anything to do with it. Higher bit depth allows more freedom for image manipulation – exposure, contrast, color saturation adjustment.

Link | Posted on Sep 25, 2016 at 00:10 UTC
On article Photokina 2016: Olympus E-M1 Mark II overview video (295 comments in total)

When are we going to get 16 bit raw files?

Link | Posted on Sep 24, 2016 at 02:14 UTC as 32nd comment | 5 replies
On article Brooks Institute announces closure (132 comments in total)
In reply to:

antares103: So, a private College offers a service. An individual borrows money for said service, and the government offers this money. Then, when the individual drops out cant cut it, or enters a career field that doesn't make a whole lot of money...the college is responsible for the debt and is evil for raking in money "from the backs of taxpayers"? Yet no one holds the individual responsible for making a bad decision and/or for failing to fullfill obligations they agreed to, at their own bequest? And even more so when there are state colleges aplenty offering the same degree for considerably less?

Perhaps we as a country would learn more from making our own good decisions than from free college.

You have to understand that for–profit institutions are routinely caught lying trying to recruit students and get the federal assistance money. They often misrepresent both the job market opportunities, and the support that they promise post-graduation. For example, in the reports that they offer to the prospective students they include "jobs" that are non-paying or minimal wage intern positions – they won't allow the student to repay their loan. When the student realizes that they were lied to, they can't even sue the school because the stakes are not large enough to make any lawyer interested in tackling a wealthy institution.

Link | Posted on Aug 17, 2016 at 01:05 UTC
In reply to:

EcoR1: Hmm. So this lens has a dedicated aperture ring, but it wont work with Olympus-bodies. Why can't Olympus and Panasonic standardize this behavior for m4/3-system? How is potential buyer suppose to know this?

@EcoR1 the aperture behavior is standardized: it is set on the body. It's the aperture ring that's nonstandard. None of the Olympus lenses have it, and most Panasonic lenses don't have it either.

Link | Posted on Jun 24, 2016 at 22:36 UTC
In reply to:

gsergei: A thumb down for this lens at $1300us. Guessing it will cost @1700cad. I will continue using my Oly 12/2 and FT 11-22/2.8-3.5 on the EM-1. Panasonic people keep shooting themselves in the wallet by providing an aperture ring incompatible with the Olympus bodies. No, thanks.

@rialcnis: the standard way to operate the aperture on the MFT system is with the dials on the camera body. Most likely the aperture ring on this lens is not mechanically coupled, but instead sends signals through some unused mount contacts to the body, and the body reacts to these signals instead of a dial. If this communication is not a part of the MFT specification, then the Oly may not want to , or be able to update their cameras to respond to them. Or may be it will do so later!

Link | Posted on Jun 20, 2016 at 20:25 UTC
In reply to:

gsergei: A thumb down for this lens at $1300us. Guessing it will cost @1700cad. I will continue using my Oly 12/2 and FT 11-22/2.8-3.5 on the EM-1. Panasonic people keep shooting themselves in the wallet by providing an aperture ring incompatible with the Olympus bodies. No, thanks.

I don't recall any Olympus lenses having an aperture ring. It may be that Oly bodies simply do not support that function.

Link | Posted on Jun 20, 2016 at 18:38 UTC
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zunivolo: I don't care how much you m4/3 users curse equivalence but the Fuji 16 f1.4 is just very slightly bigger, only 40g heavier and costs 300$ less (even without rebates) while offering a one stop advantage for DOF and low light. How is this exciting, except maybe for video shooters?
Happy for you guys if you think it's a good addition. For me, not worth it.

Yeah, but then you'd have to commit to the Fuji system. I like Fuji in theory, but in practice, if you buy more than that one lens, Fuji is still more expensive, and larger in size.

Link | Posted on Jun 20, 2016 at 18:33 UTC
In reply to:

disraeli demon: I'm sure Panasonic know their market but instead of this I really wish we could have some good, sharp, reasonably- priced f2.8 14mm, 12mm and 10mm lenses with clutch focus.

2.0, please. Given the Rokinon competition, there's no reason to limit oneself to 2.8.

Link | Posted on Jun 20, 2016 at 18:27 UTC
In reply to:

BostonC: I like the camera. Now it's in the comparison tool, some details have surprised me, e.g. the new jpeg engine doesn't render curved edges well, check out the orange arcs in the center, the smooth lines become crude jagsaw: http://www.dpreview.com/reviews/image-comparison?attr18=daylight&attr13_0=panasonic_dmcgx85&attr13_1=oly_em1&attr13_2=panasonic_dmcgx7&attr13_3=oly_em10ii&attr15_0=jpeg&attr15_1=jpeg&attr15_2=jpeg&attr15_3=jpeg&attr16_0=200&attr16_1=200&attr16_2=200&attr16_3=200&attr171_0=off&attr171_3=off&normalization=full&widget=1&x=-0.4853585906670828&y=-0.8094956308903521

@BostonC the penalty for the smoother RAW conversion is a loss of sharpness, which negates the removal of the AA filter. I suspect that in-camera you can reduce the sharpness setting to achieve exactly same or at least a very similar result. I recall the Panasonic cameras allow to create custom presets with adjusted image parameters.

Link | Posted on Jun 16, 2016 at 01:04 UTC
In reply to:

BostonC: I like the camera. Now it's in the comparison tool, some details have surprised me, e.g. the new jpeg engine doesn't render curved edges well, check out the orange arcs in the center, the smooth lines become crude jagsaw: http://www.dpreview.com/reviews/image-comparison?attr18=daylight&attr13_0=panasonic_dmcgx85&attr13_1=oly_em1&attr13_2=panasonic_dmcgx7&attr13_3=oly_em10ii&attr15_0=jpeg&attr15_1=jpeg&attr15_2=jpeg&attr15_3=jpeg&attr16_0=200&attr16_1=200&attr16_2=200&attr16_3=200&attr171_0=off&attr171_3=off&normalization=full&widget=1&x=-0.4853585906670828&y=-0.8094956308903521

Yep, that's what aliasing looks like in person!

Link | Posted on Jun 14, 2016 at 22:35 UTC
In reply to:

J A C S: The photo is too bluish, which impacts the image much more than the real or the imaginary Orton layer effect. The weird sky color transition from blue to pinkish to greenish (?) is the second thing that grabs attention.

It's the "blue hour", if you color-balance it to neutral you will loose the unique feeling that this particular time of day has.

Link | Posted on May 8, 2016 at 20:24 UTC
Total: 427, showing: 1 – 20
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