Vlad S

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

Comments

Total: 541, showing: 1 – 20
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I am really curious what was thinking the person who did the color grading for that video. It looks so fake, so un-organic for the idea that the company put forward...

Link | Posted on Aug 24, 2021 at 21:56 UTC as 78th comment
In reply to:

p51d007: I do not understand the obsession with selfie photos. Guess I'm old. Except for playing with the face unlock feature (I prefer fingerprint unlock), I've never used the
front camera on any of my phones.

I use my phone's front facing camera for video calling all the time. Especially with my family on another continent.

Link | Posted on Aug 10, 2021 at 02:18 UTC
On article Hands on: Leica Q2 Monochrom (270 comments in total)
In reply to:

SpeedyNeo: Excuse my ignorance, but what's the difference between an image which was produced by a B&W dedicated sensor vs an image produced by raw conversion to B&W?

Postprocessing and sensors of these days are so advanced I don't see the need for a dedicated B&W one. I could be wrong of course.

@Ergo607

"b) Also, by removing the color information, there is no need to extrapolate, so the gain is also in resolution."

Strictly speaking, it's interpolation, not extrapolation — filling in between the pixels on the sensor, instead of predicting what would happen outside of the area of the sensor.

I don't think that producing monochrome image from a Bayer array requires interpolation, as each pixel's exposure can be used, regardless of the color filter on top of it. So it should be just as sharp as a color-blind sensor.

ISO sensitivity in the absence of the Bayer filter is a valid point though.

Link | Posted on Nov 13, 2020 at 03:00 UTC

A very impressive improvement!

Link | Posted on Sep 8, 2020 at 23:37 UTC as 30th comment

"most importantly, beautiful to look at"

Really didn't expect the looks would be at the top of the list.

Link | Posted on Sep 8, 2020 at 23:21 UTC as 32nd comment | 1 reply
On article Olympus OM-D E-M1 Mark III review (1720 comments in total)
In reply to:

TommyGunn1: DPR continually criticise the Olympus for noise, but I just cannot see the difference between their favourite, the Fuji XT-4 even at 3,200 and barely any at 6,400 ISO. Totally rubbish and very biased. I use the Nikon D750 and the Olympus E-M10ii (for travel and fun) and the Oly is fine even at 1600 ISO. DPR need to stop the bias against MFT cameras because the majority of the older generation and women photographers love them for their size, low weight, excellent IQ and portability. Women photographers are simply put off by the ever bigger FF systems (just look at the sizes of the mirrorless lenses!!). They cannot lug them around for the whole day and no wonder stats show that there are very few women pro photographers, especially in the fields of sports and action photography. We need MFT system cameras to thrive to help them out. Over half of students in art school studying photography are women, but less than 10% in pro work as a profession! That is sad and plain discrimatory.

@CaNikonianite

it's a system for anyone who values compactness. I usually travel with friends, I stay behind to spend some time on taking a photo, and then I sprint to catch up with them. The size of the µ4/3 lenses allows me to carry a diverse kit and still run with it. If photography is a big part of your travel, but not the purpose of it, this system is a wonderful choice. If you are a backpacker this system is a wonderful choice.

Link | Posted on Aug 14, 2020 at 02:58 UTC
In reply to:

ilza: What are these guys talking about?!

These are pictures taken with a 150mm telescope which is at about ½ a.e. distance. Why could not they launch 300mm telescope to LEO and get THE SAME images?! (Estimated cost: a few million $s; no need to piggyback on 1.5 billion $ mission…)

(Please, no discussion of [possible] higher inclination and OTHER instruments. My question is about the images DISCUSSED here!)

@ilza

"What I question is the purpose of THE inclusion of THIS PARTICULAR instrument. Or at least the PR brouhaha NOW, before the craft changed its inclination."

Because it would be more expensive to build, launch, and manage two separate spacecraft instead of just one that includes this instrument along the other tools.

Link | Posted on Jul 27, 2020 at 02:05 UTC
In reply to:

ilza: What are these guys talking about?!

These are pictures taken with a 150mm telescope which is at about ½ a.e. distance. Why could not they launch 300mm telescope to LEO and get THE SAME images?! (Estimated cost: a few million $s; no need to piggyback on 1.5 billion $ mission…)

(Please, no discussion of [possible] higher inclination and OTHER instruments. My question is about the images DISCUSSED here!)

Actually no, I didn't notice, and now that you point it out, it's a meaningless condition, because the spacecraft was not launched just for the camera alone.

Link | Posted on Jul 22, 2020 at 20:15 UTC
In reply to:

ilza: What are these guys talking about?!

These are pictures taken with a 150mm telescope which is at about ½ a.e. distance. Why could not they launch 300mm telescope to LEO and get THE SAME images?! (Estimated cost: a few million $s; no need to piggyback on 1.5 billion $ mission…)

(Please, no discussion of [possible] higher inclination and OTHER instruments. My question is about the images DISCUSSED here!)

There are other instruments on board that measure local properties, something that you can't do from a distance. For example, the solar wind plasma analyzer; or the magnetometer.

Link | Posted on Jul 21, 2020 at 23:02 UTC

So fractal!

Link | Posted on Jul 21, 2020 at 22:57 UTC as 3rd comment
In reply to:

Michael1000: "Ultimately, the organization claims that it repeatedly attempted to get the bill modified so that it won't negatively impact freelance photojournalists, but that California lawmakers have been 'unsympathetic and unresponsive to our pleas.' "

That's no surprise. They don't care about people. This state is run by one political party, and they only care about power. I've written my ruling party representatives on issues, and have never gotten a response. They don't care. Prior to my voting district boundary gerrymandering, my district had representatives from a different party. I always got a response from them.

@Michael1000
first of all, stop being disrespectful. Accusing me of "spewing propaganda" doesn't prove any of your points, it only shows your lack of civility.

Can you please cite from AB5 what you are talking about?

In 2019-2020 budget California State allocated 1.5 billion dollars to subsidize health insurance premiums. That is NOT the ratepayers money that the insurance companies collect. https://tinyurl.com/utk2ga3

Aside from health insurance subsidies there is also the unemployment insurance and other benefits that the misclassified employees are deprived of.

Link | Posted on Jan 2, 2020 at 02:45 UTC
In reply to:

Spectro: contracting are usually freelancers. (some full time most not, boom or bust hrs) They get paid the bill rate and sometimes commission, guess there is the 3rd which is both. this would help the people who get paid on commission, like the salesmen. Let say in architecture, you make $25 an hour, but the company bill you off for $100. that surplus of 75 goes to your benefit, vacation, overhead, company profit, taxes, insurance, S.S, rent for the building to work in and equipment etc. And individual contractor may bill themselves $75-100 for the same task, they must paid for their own benefit, insurance, etc. But some don't and pocket the money themselves and expect free healthcare, etc. When you sign a contract you are agreeing to the term. California is becoming socialistic, I would like to see how business handle this and if there will be growth or business just start moving out of state.

There's no bargaining parity between a company and a freelancer. A freelancer is not in a position to demand the same level of compensation that an employee can get — that's why the companies fight so hard to keep them as contractors; so that they can save on the compensation.

Link | Posted on Dec 24, 2019 at 20:53 UTC
In reply to:

Sirandar: LOL ..... when have governments and lawmakers ever cared enough about the rights of employees to "prevent companies from exploiting workers by falsely declaring them as independent contractors".

It is much more likely they are trying to prevent media companies from avoiding paying taxes AND further clamp down on any independent source of dissent and inconvenient images .

From Spectro: Lets say as a contractor you make $25 an hour, but the company bill you off for $100. that surplus of 75 goes to your benefit, vacation, overhead, company profit, taxes, insurance, S.S, rent for the building, equipment etc. Individual contractor may bill themselves $75 for the same task, must pay for their own benefit, insurance, etc. But some don't and pocket the money themselves and expect free healthcare, etc. When you sign a contract you are agreeing to the terms.

There's a significant difference in purchasing power that companies and individuals have when they bargain for benefits. A single person's insurance, for example, is going to cost a lot more than insurance purchased by a company, per person.

There's a reason why businesses —manufacturing, financial, transportation, creative, newsgathering — what have you — tend to combine: it's a lot cheaper to operate that way, and they have much better bargaining power. Keeping employees as individual freelancers deprives them of the same bargaining power.

Link | Posted on Dec 24, 2019 at 20:47 UTC
In reply to:

Michael1000: "Ultimately, the organization claims that it repeatedly attempted to get the bill modified so that it won't negatively impact freelance photojournalists, but that California lawmakers have been 'unsympathetic and unresponsive to our pleas.' "

That's no surprise. They don't care about people. This state is run by one political party, and they only care about power. I've written my ruling party representatives on issues, and have never gotten a response. They don't care. Prior to my voting district boundary gerrymandering, my district had representatives from a different party. I always got a response from them.

Read the law, some of the NPPA's statements are clearly false.

Freelancers are not banned to work as freelancers, but the employers are banned from classifying them as such when in fact the work they perform is the same as regular employees'.

There is no requirement that the employers retain the copyright. At this time they typically do, but this is something that's negotiable, and can be changed in the contract.

The bill came about because the employers do not provide the benefits to freelancers, and the the state bears the cost of healthcare for such "freelancers" for example.

Link | Posted on Dec 24, 2019 at 20:24 UTC
In reply to:

jazja: promises.
mirrorless cameras (and lenses) will be smaller. OK.
mirrorless cameras (and lenses) will be lighter. OK.
mirrorless cameras (+lenses) will be cheaper. Hmmm? Nope.
Many photographers are waiting for Z 70-200 mm f/2.8.we don't have to wait (pay) for VR (already built into the camera).
I'm very interested in the price ;)

"mirrorless cameras (and lenses) will be smaller. OK
mirrorless cameras (and lenses) will be lighter. OK."

There are some really small cameras and lenses, so that promise was delivered. But for more professional equipment some other considerations became more important only when enough feedback was accumulated: the ergonomics and the photographer's public image.

"mirrorless cameras (+lenses) will be cheaper. Hmmm? Nope."

Not sure where that came from. The price was always determined by what the market could bear. No for-profit company will refuse the money that the consumers are willing to pay.

Link | Posted on Nov 12, 2019 at 23:54 UTC
On article Video: Frying eggs with ARRI Fresnel lights (32 comments in total)
In reply to:

Roland Karlsson: Those ARRI 650 are 650W lamps, obviously. So - yes, they should be able to cook eggs.

But, my question is rather. Can you get the same kind of warm and cozy light with a low energy lamp, of say 65W. Or will that kind of light always look harsher?

This is just my guess: all incandescent light have CRI 100. LED lights are always a cat in a bag — there's no telling what spectrum every given lamp is going to have, and whether you will be able to find an identical replacement next time you need to buy one.

Link | Posted on Aug 11, 2019 at 02:48 UTC
On article Video: Frying eggs with ARRI Fresnel lights (32 comments in total)
In reply to:

tailings: Lenses concentrate light, ie, energy, Who Knew?

Further nifty fact; the mass of the ARRI Fresnel Light can also be used to crack the egg shell, allowing access to the gooey bit inside. Neat!

They don't really need the lens if they put the frying pan directly on top of the light. All the light (and heat) will hit the pan regardless of the lens. If they need to cast the light at a distance then yes, they will need a way to focus it.

Link | Posted on Aug 7, 2019 at 20:33 UTC
On article Video: Frying eggs with ARRI Fresnel lights (32 comments in total)
In reply to:

Roland Karlsson: Those ARRI 650 are 650W lamps, obviously. So - yes, they should be able to cook eggs.

But, my question is rather. Can you get the same kind of warm and cozy light with a low energy lamp, of say 65W. Or will that kind of light always look harsher?

The "warmth" is a spectral characteristic, so if your 65W filament is at the same temperature as the 650W, yes, it will have the same warmth. But it will light a much smaller area if you want to have the same brightness.

As far as "cozy" goes, I am not sure how that is defined. If you mean "hard" vs. "soft" light – that is determined by the ratio of the light emitting area to the distance from the subject, and has nothing to do with either the power or the technology for producing the light.

Link | Posted on Aug 7, 2019 at 20:31 UTC
In reply to:

M Lammerse: Great action!

Odd to see some resemblance with the yellow vests protests I witnessed as a PJ in France. As a side note. These demonstrations in Hong Kong got already more mass media attention in the west than those violent (also by means of police brutality) yellow vests demonstrations in Paris and elsewhere.

That's simply not true. The yellow vest protests were covered (in the American news) non-stop, several times a day every day.

Link | Posted on Jun 14, 2019 at 02:49 UTC

"A series of obstacles and then new discoveries have given us the opportunity to significantly improve the entire program, not only for Hydrogen but also for RED."

I am not seeing the word "customer" in the list...

Link | Posted on Mar 19, 2019 at 01:38 UTC as 2nd comment
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