Live data from Hacker News

Two Photographers Unknowingly Shot the Same Millisecond in Time

petapixel.com

61–70 of 219 posts

Re: Two Photographers Unknowingly Shot the Same Millisecond in Time

#61
While the coincidence is real ... why couldn't these shots have been 1 millisecond off from one another? The shutter times are short enough for it...

I know it's nit-picking, but why make that the title?

Otherwise, it's also definitely worth noting that these were shot with burst mode, so that the chance of this happening is ~.7% --- definitely very unlikely, but still much more likely than most rare events you read about in the news.

Re: Two Photographers Unknowingly Shot the Same Millisecond in Time

#62
post #28

Alternate title: two photographers learn about the birthday paradox...

Not really. The birthday paradox is a paradox because it describes a circumstance that seems unlikely but actually is not. In this case it both seems unlikely and IS unlikely. If it were not unlikely we would see it happen more often.

Re: Two Photographers Unknowingly Shot the Same Millisecond in Time

#66
post #56

This is typical birthday paradox stuff right? The chance that these two photographers would ever snap the same thing at the same time is small, but the chance that any two photographers, anywhere, would do so is, I bet, pretty big (even if you factor in millisecond precision). With photographers being photographers and the internet being the internet, there's also a pretty decent change that they'd find out about it…

The birthday paradox arises because the probability that two candidates do not match is small compared to the number of candidates. In this case, the candidates are photos and a match in fact requires a match on multiple variables (e.g. angle, timing) that are effectively continuous. A match between 2 arbitrary photos must then have zero-ish probability and a non-match must have one-ish. So it still seems inestimably…

I'm not so sure. While there are multiple variables, chances are the number of landmarks in a given area that a professional photographer will consider likely to stand out as worthwhile in a storm is not all that great. While I'm not a professional photographer, I can think of maybe 3-4 places near me, for example.

And storms do not happen that often, even in places that have them "frequently", and they delimit the time, and even further by e.g. limitations such as whether the wind is too strong or the rain too heavy.

The number of locations they're likely to consider good spots to take the photo from for a given landmark may not be that great either. Both in terms of where you can actually see the landmark from, and in terms of other factors (e.g. in this case the article writer points out that both photographers had found places where they could protect themselves against some of the effects of the weather)

So that narrows locations and timeframe significantly.

Professional photographers are likely to take their time - the article writer mentions 40+ minutes of shots, and using bursts, further increasing the chance for an overlap within already relatively narrow time frames.

Additionally, external events that are the same for both (the waves) will give impulses to both with respect to when to shoot (though of course they might value different things, I'd argue people are more likely to shoot when something dramatic happens - e.g. if you have a dull day and suddenly something happens, you don't expect the pictures of that day to be evenly spaced afterwards).

I'm not saying we should expect it to happen all the time, but I also think it's easy to overestimate the number of possibilities because we've not tried to enumerate which ranges of values are actually likely.

Re: Two Photographers Unknowingly Shot the Same Millisecond in Time

#67
post #6

Earlier quoted context omitted.

As is shared in the article, the largest contributing factor is likely how Lightroom was used during post-processing.

Although there are differences in post-processing, you can see significant differences in quality in the zoomed-in crop: https://petapixel.com/assets/uploads/2018/03/Compare_with_ci... This is not surprising considering we're comparing a 60D that was released in Aug 2010 and a 5D4 released 6 years later.

That's true, but Risman is clearly very liberal with photoshopping ("moon-stitching" liberal), and it seems to me that that's the largest factor.

The turquoise tone in the waves has been overlayed (it's fake, in other words), and I bet other areas of the photo has been very heavily modified in an artificial way.

I would be curious though to read a professional analysis, since this is a very interesting (and I think rare) case of how a photo looks before and after fabric... I mean, after "art has been applied". /s

(Also, I wonder if Risman used a polarizing filter, while Gendron didn't, as it generally contributes to this type of difference (deeper blue tones, and increased resolution due to dehazing)).

Re: Two Photographers Unknowingly Shot the Same Millisecond in Time

#70
post #40

This has always been one of my favorite photographic coincidences. https://calculatedimages.blogspot.com/2013/05/3d-lightning.h...

Google Chrome thinks this site is dangerous: Your connection is not private Attackers might be trying to steal your information from calculatedimages.blogspot.com (for example, passwords, messages, or credit cards). Learn more NET::ERR_CERT_AUTHORITY_INVALID The message details continues to say that > You cannot visit calculatedimages.blogspot.com right now because the website uses HSTS. Network errors and attacks ar…

Well it crashed my whole browser (Vivaldi, OSX) after I scrolled a bit, so Chrome has a point I guess.
Post reply on HN