DSLR Camera Lenses and Their Abbreviations |  |
- DSLR Camera Lenses and Their Abbreviations
- Interesting Photo of the Day: Little Snow Monkey Enjoys the Hot Springs
- Photographer’s 1 Year Effort to Photograph a Mountain Lion Living in Los Angeles (Video)
| DSLR Camera Lenses and Their Abbreviations Posted: 18 Oct 2013 04:45 PM PDT For those of you who want to learn what these abbreviations are about, I have compiled a list of the terms used, what it stands for and of course what it will actually do for you or avoid. General AbbreviationsBefore we get into the nitty gritty of why they are all different, let’s look at the commonalities. There are three common terms to describe SLR lenses and these are simple to grasp and relate purely to more creative and performance functions.  “lens” captured by Jonathan (Click Image to See More From Jonathan) Focal length: The scope of the scene captured example 16-35mm. A lens which covers an area of 16mm (relatively wide) zooming in to 35mm. Maximum aperture: The maximum speed at which the lens can let in light. eg f/2.8 or f3.5 – 5.6 If the lens has only one number then that is the maximum aperture possible. If the lens has 2 numbers then these are the maximum apertures possible dependent upon the focal length the lens is set to. The lower the number the wider the lens aperture and the faster it lets in light. (see my forthcoming article on the law of reciprocity) AF/MF: Switch between Auto Focus and Manual Focus Canon Lens AbbreviationsTerms to describe Canon lenses Canon produce an extremely wide range of lenses for their EOS cameras. This married with the ranges produced by Sigma, Tamron and Tokina gives Canon owners an enormous range of Canon Fit SLR Lenses. The abbreviations used by Canon are as below. EF: Electronic Focus. Lens mount fits the entire Canon EOS DSLR range. EF-S: As above but only fitting the APS-C sensor digital SLR such as the 20D, 30D, 40D, 50D and 300D, 350D, 400D, 450D, 500D. The S stands for “short back focus,” meaning that the back of the lens is much closer to the CMOS (CCD if you like) than with EF lenses. USM: Ultrasonic autofocus motor. Two types. USM micro-a direct replacement for the systems on older FD motors and ‘Ring USM’ with manual override. DO: Diffractive optics. A technology allowing Canon to produce shorter physical length lenses. TS-E: Tilt-shift lens used for perspective correction in photography, usually in architectural work to alter converging lines and depth of field. Similar to ‘Sinar’ camera. L Lenses: Canon professional with higher optical quality and not specifically functionality. Usually white in colour. All L series lenses have a red ring on the outside.. MP-E: Macro Photo Electronic. Lenses designed for macro with an electronic aperture control function. IS: Image Stabilisation, A system designed to reduce hand shake. Nikon version is called VR (Vibration Reduction) and Sigma one is OS (Optical Stabilisation). Nikon Lens AbbreviationsDescribing Nikon Lenses Nikon produce a large range of lenses with their own specific acronyms. Sigma, Tamron and Tokina also make Nikon Fit SLR Lenses making the selection almost equally as wide AF DC_ Nikkor Lenses: Defocus-image Control adjusting spherical aberration and thus the blur giving rounded blur effect used for portraits. CRC (Close-Range Correction): Fot fisheye, wide-angle, Micro, and limited medium telephoto, offering higher quality at closer distances. DX Nikkor: optimised for bodies with smaller sensors. ED: Extra-low Dispersion glass. Superior sharpness and colour, correcting blue and red light travel. IF: Internal Focusing. Lens length remains unchanged Macro: suitable for close up focusing. G: Aperture adjusted by the camera body. Nano Crystal Coat: non-reflective coating for clearer images. VR: Vibration Reduction: Nikon’s version Image Stabilisation to cur down the effects of hand shake. PC-E: Perspective Control for architectural photography. RF: Rear Focusing for smoother auto focus.. Silent Wave Motor: Silent AF Sigma Lens AbbreviationsAcronyms for Sigma lenses EX: Sigma’s professional lenses. DG: For full frame bodies DC: For APS-C bodies. ASP: Aspherical lens. APO: Apochromatic lens. Unique to Sigma and for chromatic aberration. OS: Optical Stabilisation. HSM: Hypersonic Motor. Silent AF. RF: Rear focus.. IF: Inner focus so lens physical length is fixed reducing hand shake on longer focus shots. DF: Dual focus. Does not rotate during AF. Conv: Used with Sigma teleconverters. Tamron Lens AbbreviationsTamron Lenses described ASL: Aspherical AD: Reduces chromatic aberration.. Di: Full frame Di II: Cropped Frame. IF: Internal focus. LD: Low Dispersion Glass to reduce chromatic abberation Macro: Designed to focus on closer subjects SP: Super Performance. XR: Extra Refractive Glass for improved optical results. VC: Vibration Control as Canon’s IS, Sigma’s OS and Nikon’s VR. About the Author Go to full article: DSLR Camera Lenses and Their Abbreviations |
| Interesting Photo of the Day: Little Snow Monkey Enjoys the Hot Springs Posted: 18 Oct 2013 03:56 PM PDT Winter is harsh in Japan's mountainous Jigokundani Monkey Park, with heavy snow covering the ground for more than one third of the year and temperatures often plummeting below -15 °C. Why then, of all places, would a large population of Japanese Macaques—that is, snow monkeys—choose to make their home there in "Hell's Valley," where cliffs are dangerously steep and steam rises from ominous cracks in the frozen ground? Surprisingly, it's the prospect of a warm bath in Jigokundani's hot springs that draws them in. Pure enjoyment is evident on this young macaque's face as he soaks away the winter chill:  Little snow monkey thoroughly enjoys hot spring bath (via Imgur, click to see full size) This photo was taken by Ben Torode, a photographer from Tokyo who has created something of a franchise with photos of his kitten Daisy, who is widely known as "the cutest kitten in the world." Torode has also captured many stunning photographs of snow monkeys bathing and grooming in the Jigokundani hot springs. He described the little monkey in this photo as being "down in the dumps" and shivering before it slid into the hot springs, but said that the juvenile's attitude improved dramatically when it entered the water.
The sheer delight that is so evident in this little monkey's face has revived discussion about whether we've overestimated the differences between humans and non-human primates. While Torode thinks that this little monkey was less excited about the warm water as it was about the seed it had hidden in its mouth, Torode certainly believes that humans and monkeys are similar.
Though high concentrations of bacteria in the hot spring pools bar swimming to humans, many tourists stop by the pools anyway to watch the monkeys, and many are able to peacefully get within two feet without causing trouble. However, according to Torode, photographers get the best view.
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| Photographer’s 1 Year Effort to Photograph a Mountain Lion Living in Los Angeles (Video) Posted: 18 Oct 2013 11:36 AM PDT Next time the circumstances require you to stare through your lens for hours or to return to a site day after day until you finally get the perfect photograph, remember that oftentimes even National Geographic photographers don't get the shot the first time around… or the second… or the third… Steve Winter, a seasoned National Geographic photojournalist, is living proof of the value of dogged patience and persistence in photography. He spent one year trying to photograph an elusive mountain called P-22 living in Los Angeles' Griffith Park with the city skyline in the background and another two months to get a photo of the cat with the Hollywood sign. In this video, Winter explains his process of using remote cameras triggered by infrared to make the images: Since P-22 moved in to Griffith Park from the Santa Monica Mountains, biologists have managed to capture and tag him so as to gather data about urban cats from his movements and behavior. They weighed him at 125 pounds and estimate him to be four years old, making him the largest predator in the area. However, considering that three of Winter's steel DSLR box setups were stolen throughout the course of the project, Winter would probably disagree with that statement.  P-22 stands near the edge of a cliff with Hollywood’s lights in the background. (Steve Winter) So, where's the shot of P-22 with the Hollywood sign? Conveniently, the photograph hasn't been released yet. To see it, you'll have to wait for the December issue of National Geographic magazine. In the meantime, take a look at the rest of Winter's stunning wildlife photography on his website gallery.
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