"When Lensrentals.com first got the first Canon 5Ds and 5D sr cameras in stock, Aaron and I immediately started screaming that we wanted to take one apart. It turns out we received enough 5Ds cameras to let us have a day with one to do just that. Of course, we don't expect to find out anything amazing and revealing. We expect it will look pretty much like the Canon 5DIII and 7DII on the inside. But hey, you never know. Plus we'll be repairing these soon enough, so we might as well find our way around now.See the entire article on the LensRentals Blog.
If you want to do some comparisons yourself, you can compare this to our Canon 5D III teardownand Canon 7D II teardown. Or if you'd rather follow along from home with your own 5Ds go grab your screwdrivers and let's get started!"
"Like everybody else, we're pretty excited to get our hands on Canon's new 5DS and 5DS R. There are already a lot of hands-on articles about the cameras that probably have told you more than you need to know to make your purchase decision. Of course, for most of the Canon shooters who read this blog, the purchase decision was just which place you want to buy it from.Resolution tests included use of the Canon 300 f/2.8L IS II USM, Zeiss 85mm f/1.4 Otus, Zeiss 21mm f/2.8 Distagon T* ZE & the Canon 50mm f/1.4 USM. To find out how each lens performed when paired with the 5D III, 5Ds and 5Ds R, check out the full LensRentals Blog article.
For me, I want some lab data to see just how much of a difference those megapixels make. More particularly, I want to see how much of a difference they make when shot through a reasonably good lens, an excellent lens, and an adequate lens. Some people want to simplify things too much and claim certain lenses are 'good enough' for the new cameras and others aren't. It's not that simple.
So we begged and threw temper tantrums until Drew agreed to let us have a couple of the new cameras for a couple of days testing in our Imatest lab. That was enough time for us to get a quick overview using several different sample lenses, but it will be months before we have a good database of which lenses are most capable on the new cameras."
"I've been blogging about testing and taking apart camera equipment for almost a decade. Lensrentals.com has many thousand lenses these days, and they all get used frequently. When you have lots of lenses and they get used frequently, stuff gets inside them.Check out the amazing, illustrated article on the LensRentals Blog.
Usually the stuff that gets inside is dust. Our repair techs open up and clean dust out of more than 100 lenses a week. Not because the dust matters a bit in a photograph; it doesn't. But because people still seem to think it does. People also, for reasons I can't understand, seem to think that weather sealed lenses are less likely to get dust in them than non-weather sealed lenses. I'm not sure why they think this, but they do.
Sometimes the stuff that gets inside them is interesting and we get to blog about it. We found a spider, complete with web, inside a lens once and yesterday we got to add a new item to our 'found inside lenses' collection; a nice, fat, fly. And not just a fly inside a lens, but one way down deep inside a weather sealed lens. So deep that it took 4 hours of work to get it out."
"Every once in a while we notice something, because of the large quantities of cameras and lenses we buy, that we think people should be aware of. This particular issue won't affect our renters; we've sent the affected cameras back. It may not affect very many people at all, since this is from a relatively small sample size. But I still think it worth mentioning.See the entire article on the LensRentals Blog.
The bottom line is that 4 of the Canon T6s and 2 of the T6i cameras we received had to be sent back because of a defect in the sensor stack (the layers of filter glass over the sensor). This is out about 10 copies of each; the others were absolutely perfect."
"Most of you know I've been very impressed with Sigma's new Art lenses. Their 35mm f/1.4 Art I still think is the sharpest 35mm prime lens made. The 50mm f/1.4 Art is also superb.See the entire article on the LensRentals Blog.
When I heard about the Sigma 24mm f/1.4 Art lens, I had some mixed emotions. I was excited that we might get a 24mm lens of similar quality to their 35mm. But the logical side of me thought that perhaps Sigma had bitten off a bit more than they could chew this time. Designing a wide-aperture 24mm lens is much more difficult than designing a fast 35mm lens. Even the best 24mm f/1.4 lenses (I consider the Canon 24mm f/1.4 L to be the best current offering, although that's arguable) still have distortion, aberrations, and some edge softness.
But when our first five copies of the Sigma 24mm f/1.4 arrived, I swiped them from intake and took them over to the testing lab for a quick look and MTF testing on our optical bench. We already had results from the Canon 24mm f/1.4 L, the Nikon 24mm f/1.4 ED AF-S, and the Rokinon 24mm f/1.4 lenses in our database to compare them to."
"This is a remarkable lens. Canon made the widest full-frame rectilinear lens available, and made it with superb image quality throughout the zoom range. Once again, hat's off to Canon's lens designers."B&H has the Canon EF 11-24mm f/4L USM available for preorder.
"For those two or three of you who don't like a little lens strip-tease I'll give you the quick summary: the build quality on this thing is amazing. I usually laugh when people describe a lens as 'built like a tank' because what I know is the lens they are describing has a thick, heavy outer metal shell filled with tiny delicate pieces that break and wear out with great frequency. But this lens is built like a tank inside and out.The fully illustrated article can be found on the LensRentals Blog.
I know I can't really, without showing you dozens of other lenses, do a good job of impressing you with just how robustly engineered this lens is. I will say that the insides look more like what we'd expect to see in a 500mm f/4 or 600mm f/4 lens, rather than a telezoom. It's by far the most heavily engineered zoom lens Aaron and I have ever seen; and we've seen the insides of dozens of lenses in this range.
Well done, Canon engineers, well done!"
"For those who want to take my word for it and skip on to some other blog, the Canon 7D Mk II may be the best weather-sealed camera I’ve run across. It’s excellent. For those who would rather see for themselves, gory camera dissection pictures follow!!For the complete set of teardown images, check out the LensRentals Blog.
"I try to start these articles by putting my preconceptions out there first. Every reviewer or blogger has them, they affect our opinions, and you have a right to know them. So I’m writing this introduction the day before our first copies arrive.
The lens is designed by IB/E Optics GmbH in Germany and manufactured by Kipon (aka Shanghai Transvision Photographic Equipment Co. Ltd). IB/E has developed a number of lenses and adapters for the Cinema world and other optics, so I figured the design would be good; probably a telecentric lens with a built-in speedbooster-type element or group. Kipon is known as a lens adapter company, although Shanghai Transvision has also manufactured and distributed video and photo accessories. They are rumored to manufacture lenses for other brand names, so they have some lens manufacturing experience. But, I have to say, my expectations for build quality weren’t great.
Okay, so much for what I expected. There are now five new copies sitting on my desk so let’s take a look."
Check out the rest of the article at the LensRentals Blog.
B&H carries the Handevision IBELUX 40mm f/0.85 Manual Lens for EF-M Mount.
"Now that I’ve seen the insides I’m very optimistic that this lens will be less likely to deteriorate optically over time, and will be more easily corrected when it does. We won’t know for sure until we’ve got a year’s experience with it, of course, but from a design and assembly standpoint it looks really, really good.
I know I’m beginning to sound like a Fanboy, especially considering I hardly ever mount a wide-angle zoom on my camera. But I guess the corny old line from the Most Interesting Man in the World works. 'I don’t often shoot Canon wide angle zooms, but when I do, I prefer the 16-35 f/4 IS.'"
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