uncleflo
Registered since September 28th, 2017
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Tamron 18-400mm f3.5-6.3 Di II VC HLD Wide Angle Lens for Canon APS-C - Black for sale online | eBay
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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Scuba Masks by HydroOptix -- Buy -- Prices
Saved by uncleflo on January 17th, 2022.
Our Double-Double dive masks' patented optics provide razor-sharp Panoramic Views, 350% greater than conventional flat dive masks, completely free of distortions, no matter where you look. HydroOptix Double-Dome scuba masks give divers superior situational awareness and eye-hand coordination -- your time underwater becomes safer, more productive and enjoyable.
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Why are modern 50mm lenses so damned complicated?: Digital Photography Review
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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ISO 12233 — Resolution and spatial frequency responses | imatest
Saved by uncleflo on January 6th, 2019.
This new standard defines three test charts. The new Imatest eSFR ISO module performs a highly automated analysis of the new low contrast (4:1) Edge SFR chart and is available in Imatest Master and Image Sensor 4.0. This chart does not work with the highly automated Imatest eSFR ISO module, described below. For highly automated measurements (including squares near the corners, color patches, and wedges) we recommend one of the Imatest eSFR ISO charts shown below. These charts are fully compliant with ISO 12233:2017. Supported by the Imatest Star Chart module. Optional automatic region detection is available when used with a star pattern that has registration marks on the sides of the image.
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SVG on the Web - A Practical Guide
Saved by uncleflo on May 5th, 2018.
We live in the age of pixels. As designers & developers of the web, pixels can be both our friends and our enemies. We want everything to look nice and sharp for anyone who uses any of the websites we work on, but we need to keep file sizes down for performance. There is pretty much only one way to go with icons, logos and illustrations on the web — SVG. Scalable Vector Graphics can look crisp at all screen resolutions, can have super small file sizes, and can be easily edited and modified. This guide aims to give a practical overview of how you can use SVGs on your websites — with some tips and tricks along the way to get the most out of them.
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Canon EOS-1D X Mark II
Saved by uncleflo on July 19th, 2016.
Seize the moment. Every. Single. One. SuperSpeed USB 3.0 and Gigabit connectivity via Ethernet or the WFT-E8 WiFi adapter brings superb workflow flexibility to any location while the built-in GPS can auto-update time whenever you change a time-zone by connecting to a global network of GPS satellites. The crop and resize functionality lets you send the frame as you want it to be seen, without the need for a PC.
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