{"product_id":"leica-sl-90mm-f2-0-apo-summicron","title":"Leica SL 90mm f2.0 APO-Summicron","description":"\u003ch2\u003eLeica SL 90mm f2.0 APO-Summicron\u003c\/h2\u003e\n\u003cp\u003eIts high speed and the unique aesthetics of its depth of focus make this telephoto lens the first choice for portrait photographers. At the decisive moment, its almost silent and simultaneously precise autofocus gives photographers more time to concentrate fully on the creative aspects of their subject, the person in front of their camera. Like all Leica SL-Lenses, the APO-Summicron-SL 1:2\/90 ASPH. is perfectly matched to the modern SL-System and is constructed for a long working life under professional shooting conditions.\u003cbr\u003e\u003cbr\u003eThe AF system of the Summicron-SL lenses is fast, precise, and almost silent. They thank their outstanding AF performance figures to the autofocus drive unit they share. These are limited only by the mass of the lens elements moved when focusing, the travel from infinity to the closest focusing distance and, of course, the amount of space available. In order to preserve the compact dimensions of the lenses, the integration of these components must follow an integral approach.\u003cbr\u003e\u003cbr\u003eSpecialists from the areas of optical and mechanical engineering and electronics worked together in an interdisciplinary team on the development of a unique lens concept based on double internal focusing. This system, comprising two particularly light focusing lenses, allows the construction of particularly small and compact drive systems. In addition to space limitations, the choice of the drive motors is also determined by the AF principle used for focusing.\u003cbr\u003e\u003cbr\u003eSeveral contrast measurements at various focusing positions must be made before the correct direction of motion for focusing can be determined and followed by precise focusing. In this procedure, the focusing lenses must be moved rapidly backwards and forwards in accordance with the speed specifications of the contrast AF system. This requires a dynamic drive system without any play.\u003cbr\u003eIn the Summicron-SL lenses, the drive units installed are extremely powerful and robust stepping motors with Dual Syncro Drive™. Thanks to these, the entire focusing throw can be traveled completely in fractions of a second. This means that the Summicron-SL lenses achieve values that are among the best in the full-frame system segment in terms of speed, precision, and noise emissions. \u003cbr\u003e\u003cbr\u003e\u003cb\u003eHigher Contrast\u003cbr\u003efor greater perceived depth\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eWith an initial aperture of f\/2, the SL-Summicron lenses are significantly more compact than faster lenses, but still allow photographers to work with similar depth of field. The reason for this is contrast: the zone of highest contrast is perceived by viewers as being sharp, while zones with lower contrast are regarded as being unsharp.\u003cbr\u003e \u003cbr\u003eIn the case of SL-Summicron lenses, this difference in contrast is considerably higher than that of conventional lenses: sharply focused objects show much higher contrast than objects that are out of focus. This means that objects “snap” more distinctly out of the foreground or background and more effectively isolate the subject. This creates a three-dimensional visual effect with very impressive apparent depth.\u003cbr\u003e\u003cbr\u003eIn the construction of the Summicron-SL lenses, particular attention has been paid to the prevention of stray light and reflections. The optimization of the optical and mechanical design was carried out in elaborate simulations before the construction of the first prototype lenses. Unavoidable reflections are reduced to the best possible level by high-quality coating of lens surfaces.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch5 data-start=\"88\" data-end=\"118\"\u003eWhat Our Experts Think\u003c\/h5\u003e\n\u003cul data-start=\"119\" data-end=\"474\"\u003e\n\u003cli data-start=\"119\" data-end=\"213\"\u003e\n\u003cp data-start=\"121\" data-end=\"213\"\u003eFast f\/2 aperture delivers excellent low-light performance and smooth, professional bokeh.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"214\" data-end=\"304\"\u003e\n\u003cp data-start=\"216\" data-end=\"304\"\u003eAPO-Summicron optics provide exceptional sharpness, high contrast, and color accuracy.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"305\" data-end=\"389\"\u003e\n\u003cp data-start=\"307\" data-end=\"389\"\u003ePrecision Leica SL-mount construction ensures durability and reliable autofocus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"390\" data-end=\"474\"\u003e\n\u003cp data-start=\"392\" data-end=\"474\"\u003eIdeal for portraits, events, and telephoto photography in professional settings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"476\" data-end=\"487\"\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cul data-start=\"488\" data-end=\"949\"\u003e\n\u003cli data-start=\"488\" data-end=\"615\"\u003e\n\u003cp data-start=\"490\" data-end=\"615\"\u003e\u003cstrong data-start=\"490\" data-end=\"496\"\u003eQ:\u003c\/strong\u003e Is this lens compatible with Leica SL cameras?\u003cbr data-start=\"543\" data-end=\"546\"\u003e\u003cstrong data-start=\"548\" data-end=\"554\"\u003eA:\u003c\/strong\u003e Yes, fully compatible with all Leica SL (L-mount) cameras.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"616\" data-end=\"717\"\u003e\n\u003cp data-start=\"618\" data-end=\"717\"\u003e\u003cstrong data-start=\"618\" data-end=\"624\"\u003eQ:\u003c\/strong\u003e What is the focal length?\u003cbr data-start=\"650\" data-end=\"653\"\u003e\u003cstrong data-start=\"655\" data-end=\"661\"\u003eA:\u003c\/strong\u003e 90mm, perfect for portrait and medium telephoto work.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"718\" data-end=\"834\"\u003e\n\u003cp data-start=\"720\" data-end=\"834\"\u003e\u003cstrong data-start=\"720\" data-end=\"726\"\u003eQ:\u003c\/strong\u003e Can it perform in low light?\u003cbr data-start=\"755\" data-end=\"758\"\u003e\u003cstrong data-start=\"760\" data-end=\"766\"\u003eA:\u003c\/strong\u003e Absolutely, f\/2 aperture provides excellent low-light capability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"835\" data-end=\"949\"\u003e\n\u003cp data-start=\"837\" data-end=\"949\"\u003e\u003cstrong data-start=\"837\" data-end=\"843\"\u003eQ:\u003c\/strong\u003e Suitable for professional use?\u003cbr data-start=\"874\" data-end=\"877\"\u003e\u003cstrong data-start=\"879\" data-end=\"885\"\u003eA:\u003c\/strong\u003e Yes, designed for professional photographers and enthusiasts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 data-start=\"951\" data-end=\"975\"\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul data-start=\"976\" data-end=\"1299\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-start=\"976\" data-end=\"1044\"\u003e\n\u003cp data-start=\"978\" data-end=\"1044\"\u003eClean lens glass with a microfiber cloth and lens-safe solution.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1045\" data-end=\"1119\"\u003e\n\u003cp data-start=\"1047\" data-end=\"1119\"\u003eUse front and rear caps when not in use to prevent dust and scratches.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1120\" data-end=\"1185\"\u003e\n\u003cp data-start=\"1122\" data-end=\"1185\"\u003eStore in a dry, cool environment to protect optical coatings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1186\" data-end=\"1222\"\u003e\n\u003cp data-start=\"1188\" data-end=\"1222\"\u003eAvoid impacts or rough handling.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1223\" data-end=\"1299\" data-is-last-node=\"\"\u003e\n\u003cp data-start=\"1225\" data-end=\"1299\" data-is-last-node=\"\"\u003ePeriodically check autofocus and aperture mechanisms for smooth operation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eComplex Electronics\u003cbr\u003efor uncomplicated handling\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eThe focusing and aperture setting functions of a SL-Summicron lens are based on a multitude of control systems and mathematical operations. The demands on the electronics are particularly high in the case of the double focusing system. \u003cbr\u003e\u003cbr\u003eThe two autonomous focusing units must be moved in perfect synchronization and positioning data have to be analyzed at a very high sampling rate and passed on to the camera. Here, the communication with the camera is so fast that there is no perceptible delay. These are the primary preconditions for fast and precise contrast AF.\u003cbr\u003eThe aperture is driven by a stepping motor. Here, a special micro-step control system ensures precise and fast movements with minimized vibration.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eManual Focusing\u003cbr\u003eA new experience\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eSL-Summicron Lenses feature a totally new manual focusing ring construction concept. In this concept, a ring magnet with alternating north-south magnetization is embedded in the manual focusing ring. The magnetic field changes its polarity when the ring is turned. A sensor monitors the status of the magnetic field and sends the data to the main processor. The drive then shifts the lens to the corresponding focusing position on the basis of the angle of rotation and the rotational speed.\u003cbr\u003eThe construction of the MF-ring guarantees reliable sealing against dust and water spray, provides protection against impacts and other mechanical stresses, and prevents focusing inaccuracies as a consequence of temperature fluctuations. Even after years of use, the MF-ring of a SL-Summicron lens impresses with a smooth action without play and homogeneous focusing.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eImpressive\u003cbr\u003edown to the smallest detail\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003eThe consistently compact dimensions, low weight, and the excellent grip and feel of the SL-Summicron lenses are particularly impressive when shooting. Thanks to the almost identical design of the Summicron-SL lenses, feeling for the MF ring is unnecessary after switching lenses and the center of gravity remains largely the same. This means that the camera always lies perfectly in the hand and makes working from a tripod much easier. \u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003eProduct Specifications:\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eOrder number\u003c\/b\u003e 11 179\u003cbr\u003e\u003cbr\u003e\u003cb\u003eField angle \u003c\/b\u003e(diagonal, horizontal, vertical) 27.3° \/ 22.9° \/ 15.4°\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003eOptical design\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eNumber of lenses\/groups\u003c\/b\u003e 11\/9\u003cbr\u003e\u003cb\u003eNumber of aspherical lenses\u003c\/b\u003e 1\u003cbr\u003e\u003cb\u003eEntrance pupil position \u003c\/b\u003e 22.9 mm\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003eDistance setting\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eWorking range\u003c\/b\u003e 0.6 m to infinity\u003cbr\u003e\u003cb\u003eSmallest object field\u003c\/b\u003e 120 x 180 mm\u003cbr\u003e\u003cb\u003eLargest reproduction ratio \u003c\/b\u003e1:5\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003eAperture\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eSetting\/function Electronically \u003c\/b\u003econtrolled aperture, set using turn\/push wheel on camera, including half and third values\u003cbr\u003e\u003cb\u003eAperture\u003c\/b\u003e setting range 2-22\u003cbr\u003e\u003cb\u003eLowest value\u003c\/b\u003e 22\u003cbr\u003e\u003cbr\u003e\u003cb\u003eBayonet\/sensor format \u003c\/b\u003eL-Mount, full-frame 35mm format\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFilter mount\u003c\/b\u003e E67\u003cbr\u003e\u003cbr\u003e\u003cb\u003e\u003cspan style=\"font-size: large;\"\u003eDimensions and weight\u003c\/span\u003e\u003c\/b\u003e\u003cbr\u003e\u003cb\u003eLength to bayonet mount\u003c\/b\u003e 102 mm\u003cbr\u003e\u003cb\u003eLargest diameter\u003c\/b\u003e 73mm\u003cbr\u003e\u003cb\u003eWeight\u003c\/b\u003e 700 g\u003c\/p\u003e","brand":"Leica","offers":[{"title":"Default Title","offer_id":45364771487804,"sku":"72254","price":4650.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/6151\/5324\/files\/72254-05_17.jpg?v=1778504425","url":"https:\/\/e-powergo.com\/products\/leica-sl-90mm-f2-0-apo-summicron","provider":"Set Up Your Ultimate Retreat","version":"1.0","type":"link"}