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Tag selected: aperture.
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Saved by uncleflo on February 13th, 2022.
Tamron 18-400mm EF-S lens I've been disappointed by the performance of both Canon & Sigma small extreme telephoto zoom lenses, particularly sharpness at the long focal lenses. Then along comes this 18-400mm lens that is the exception to the rule. It autofocuses well even at 400m zoom (at F6.3) given reasonable contrast. Focus is quiet, the anti-vibration feature provides a useful damping of shake, and at F8 the images is less than about 1 pixel blurred even at this huge zoom. At wide angle there is a little exposure fall-off at the corners. Not exceptionally lightweight but perfectly well balanced with the EOS 7D - quite a heavy camera for an EF-S mount. This lens has transformed the usefulness of the 7D as a medium sized setup to for wildlife photography. Not not quite at the quality of an EOS 1D Mk IV + huge and heavy Sigma 50-500mm IS (NLA) but much easier carry and hold and a good choice for a long trek.
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Saved by uncleflo on February 13th, 2022.
Waterproof 360 Action Camera with Stabilization. Features: 5.7K 360° Capture; Steady Cam Mode; FlowState Stabilization; Ultra-Bright Touch Screen; Invisible Selfie Stick; Waterproof to 10m; AI Editing; 4-Mic 360° Audio; TimeShift; Voice Control. Next-level remote meetings: Take your remote meetings to the next level with a 360 webcam. Connect ONE X2 to your favorite conferencing platform and see the entire room in split-screen. Go live with ONE X2. Choose the 360 live streaming mode to let the audience explore in any direction or control the perspective in real-time with Reframe Live.
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Saved by uncleflo on May 11th, 2021.
DXOMARK's comprehensive camera lens test result database allows you to browse and select lenses for comparison based on their characteristics, brand, price, lens type, lens size, focal range and aperture. You can also select a camera to see the results for all the lenses tested on it. With DXOMARK you can display the lenses with three different views - Grid, List or Graph in order for you to have the best solution to compare the filtered results. Choose the lenses you want to compare from the results below. Then in the selection box, you can check up to three lenses at a time to compare their measurements.
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Saved by uncleflo on May 11th, 2021.
Back in the days when men were iron and ships were wood, there were some things you could rely on. One of those things was your wide-aperture prime lens was a relatively simple double-guass design. Pre-1900, lens designers had already created five of the six lens types that are the basis of what we use today. (The retrofocus lens didn't come around until the 1920s, and zoom lenses, for those who are curious, are basically modified Cooke triplets.) The double gauss has been THE predominant design for wide aperture primes since the late 1800s. Over the years, designers have added additional groups to bring in more light, correct aberrations, and generally make a better lens. But the double gauss part was there in the center of the lens diagram for wide-aperture prime lenses right up until modern times. Name a famous prime lens and it was probably a double gauss: Speed Panchro, Planar, Xenon, Summicron, Takumar, Ultron, and on and on.
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Saved by uncleflo on July 9th, 2019.
Photography Made Easy gives you the knowledge and skills you need to finally master your camera and capture pro-level pictures – every time. Delivered by an award-winning professional photographer and university lecturer, the Photography Made Easy course teaches you 20 fields of photography: from creative photography to landscape to portrait to fashion to travel to sports photography to editing and more.
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Saved by uncleflo on January 6th, 2019.
So, you just bought a shiny, new, and maybe expensive, lens for your camera, and being the savvy consumer, you did your homework. You pored over customer reviews on the B&H Photo website, read online reviews splattered all over the Internet, grabbed a copy of every photo magazine that reviewed the lens, bookmarked dozens of websites, and now have the lens’s MTF curve charts burned into your retinas. Now, your lens is here and it is time to go out shooting. Honestly, not a problem. Your lens should be as good as it can be and, as photographers, we want to take photos. So, stop reading and go out and make some photographs! Still here? OK, let me tell you why you might want to test that lens yourself. The main reason is that even with today's precision computer-controlled manufacturing techniques, there are variations in each and every lens that rolls off an assembly line. This means that some examples will be better than others. Some lenses will be outstanding and others will make you wonder if all of those glowing reviews you read online were completely bogus.
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Saved by uncleflo on July 23rd, 2016.
The EF 28-300mm f/3.5-5.6L IS USM Lens from Canon is an all-in-one zoom lens for versatile and easy subject selection for multiple photographic applications. This lens offers the highest optical performance in its class, plus the convenience of focusing as close as 2.3 feet over the entire zooming range.
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