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But LensRentals optical bench testing can show you things about the lens aberrations that you can't necessarily see in a resolution chart, too. Astigmatism is one clear example. The MTF chart also shows how the lens behaves as a function of spatial frequency, and again how these vary with...

I fixed that for you. Look, I call it like I see it. If someone is factually incorrect--which he very clearly is--and refuses to own up to it, then he deserves to be ridiculed. If he were a decent human being and acknowledges that he has been spreading misinformation, then I would not be...

Sadly, no. The exterior barrel of the EF 85/1.2L II is treated with a special rubberized finish to improve grip, because it is a fat, heavy, and round lens. It isn't found in most other EF lenses--in fact, I can't think of any other lenses in production that have it.

You have a few options: Least risky option: Send it in to Canon to have them replace the exterior components. This will cost money, but not a prohibitive amount. More risky option: Use a solvent to dissolve the coating, and live without it. I don't recommend this due to the danger of...

The last link is particularly interesting, because in retrospect, after Canon's announcement of BR element technology for the 35/1.4L II, that last bullet point in the patent from 2011 (filing date!) now actually means something. Canon was working on using BR tech and actually hinted at it for...

I anticipated the release of the EF 35/1.4L II was imminent on the basis of a $150 rebate that was offered on the EF 35/1.4L that was relatively large in comparison to the rebate on other fast-aperture EF L primes. At the time, I also predicted that an EF 35/1.4L II would have improved...

"Silicon gel" LOL. Keep digging yourself deeper, troll.

The OP specifically asked about lenses suitable for photographing schoolchildren for a school. He showed a sample of his animal portraiture. And then after some standard recommendations were made, we get a stream of photographs from posters using all kinds of other lenses, in an attempt to...

Exactly, which is why that guy's attempts at salvaging his gear was so obviously futile. Salt water is death to cameras and other electronics.

The only person that was left guessing was you. Don't presume that just because you are ignorant, that everyone else must be as well.

Just because I don't go into every single excruciating detail about how to properly select and use rechargeable silica gel doesn't mean there isn't a way to use it effectively and simply, or that I'm ignorant of its proper usage. I use it all the time in my Pelican cases. You are being rude...

Just read this on PetaPixel: http://petapixel.com/2016/02/05/shooting-a-winter-storm-killed-my-canon-7d/#more-202201 I don't understand how anyone can be so incredibly stupid. This misconception has been hashed out many times before: "weather-sealed" does not mean that you can let ocean...

For photographing children *specifically*, a shorter focal length is probably better. The reason is that a child's face is proportioned differently than an adult: their faces are rounder and flatter; and their noses are proportionally smaller. A longer lens will accentuate the roundness of...

Moreover, it may be interesting to point out that this difference should get smaller as the lens is stopped down; so for example, if the lens is shot at f/4, the t-stop will not remain over one stop slower, since the filter's proximity relative to the aperture stop should be as close as...

Mathematically, it isn't 0x zoom. A fixed focal length lens is 1x zoom, although to my mind both are rather silly notions. Zoom ratios are exactly that: a lens like a 70-200mm has a zoom ratio of approximately 200/70 = 2.85714x at infinity focus, and the general formula is zoom ratio =...

Re: Canon 200mm f/1.8 USM Because older brothers tend to be slower too. *giggles*

What distinguishes ceramic from glass in this particular application are two things: the presence of oxides of aluminum, and a semi- or microcrystalline structure. This means that it is not Gorilla glass. It is not chemically strengthened glass. It is not tempered or annealed in a way that...

Insulting comments removed by Moderator

Insulting Comment removed by Moderator

PhotoZone's results are not reliable. I stopped reading that site years ago because it is clear that the author has a strong bias toward Zeiss, even when other brands perform just as well; and in general, the author has a bias toward alt lenses. As evidence I submit that PZ does not test more...