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p.3 #7 · p.3 #7 · "X-T2 Smokes the Nikon D500 in Autofocus Speed" | |
ggreene wrote:
I actually like the angry photographer. He can be repetitive though and I'd like to see him shorten his videos and keep it more concise. He's definitely opinionated and has his favorite topics. He's a huge fan of low element count lenses. Also, more of a metal build guy and can be quite disparaging of modern designs especially with a lot of plastic. See his preview on the Nikon 105/1.4.
Have no idea if he has a corporate backer or not but he seems fairly genuine. Some of the other Youtubers like Lanier, Racey, Northrups, Camera Store, and even Polin just seem to be shills for whoever is paying their way this week. I don't watch them much anymore.
Angry Photographer is worth watching once just to hear him cackle. ...Show more →
I cannot believe this, as this guy is not to be take serious. Here an excerpt taken from one of his videos (by M. Oelund at dpreview): "Marianne Oelund wrote:[...] Here are some quotes from his recent discussion about rare earth glass and dispersion. From :
"This is going to sound like a really arrogant statement. Sometimes a really arrogant statement seems arrogant to you but in fact it's the truth.
Nobody in photography - nobody - including lens manufacturers, knows more about the nature of light and how light works than I do. Whisper: Oh, that's really arrogant.
Yeah? Find me another person that has anywhere near the skills that I have and experience in lenses and field theory and fringe technology insofar as the manipulation of light. Please find them. Find them.
A lot of people like in photonics, there are a lot of people with amazing PhD's in photonics. That doesn't mean that they've actually put two and two together. They have a lot of information, that they're able to regurgitate and a lot of stuff that they studied. Some of them have even got patents, but that doesn't mean they really understand the nature of light."
"Nobody ever explained how magnets work until I came along. I own every book on magnetism ever written. I own it and I have it. Every single one.
Nobody has ever defined what a field is, nobody was ever able to tell you, until my book came along, how a magnet works. What a magnet is; conjugate vortex, reciprocating precessional hyperboloid. I told you how it worked, the way it works, the loss of inertia."
"By adding lead or niobium or thorium, what it does is it wrangles the light, actually accelerates the light into its path. In other words it keeps it on a path . . .
It's like a guardrail. When light goes through lenses and it travels through these various indices of refraction, it wants to go over the guardrail. That's dispersion. The reason why the thorium and the lead is in the glass is they act like guardrails on a road that someone's going too fast. It's like, you know you're supposed to take this turn at 30mph and the guy's driving 60 and he'd either go over the side . . . that's dispersion. That's what light does.
It's going to change its rate of induction. It doesn't change the rate of induction through the glass, but what it does is it acts like a guardrail. In a very crude analogy, that's what the lead and the thorium actually does in lenses, it actually keeps the light on the path through the lenses, eliminates out much of the dispersion.
Nobody has ever written about this before. You will not find a video of any of this information anywhere. Anywhere! Now this is the science of photography and lenses, obviously this is not the art side.
Obviously, photography is an art form but this is interesting information and nobody has ever made a video on it before. Nobody's ever talked about it before. Nobody knows what the hell they're talking about when it comes to this subject, but I do.
Not only do I have the facts behind it, but I've also got the logic behind it. This is the way thorium and lead and lanthanum dioxide and niobium dioxide is actually added to the glass. This is what it does. It guardrails the light that wants to go over the corner through high indices of refraction and multiple elements because of dielectric permittivity.
In other words it is accelerating the light towards the nucleus of the thorium, of the lead. By accelerating it towards the nucleus, and the nucleuses are everywhere since it's scattered throughout the glass, that means it guardrails the light as it's passing through the lenses. That's as crude as I can explain it, I mean you could explain it a lot more specifically but then people's minds would go, "Oh, this is too much, my brain is seizing up." [Ghoulish laughter.]"
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