klim optics
Maschera snow Oakley Ambush nero
Creati per adattarsi al meglio ai visi dai tratti asiatici, garantendo vestibilità e comodità. Negli ultimi decenni abbiamo sfidato il concetto comune di possibilità, portandolo ancora più in alto, là dove i limiti estremi arrivano a toccare il cielo. Le maschere Ambush™ Snow di Oakley rappresentano il vertice assoluto delle prestazioni, trasformando un semplice svago nel dominio incontrastato in ogni gara. La vestibilità è perfetta e ben bilanciata grazie ai gancetti articolati che distribuiscono equamente la pressione. Quando muscoli e polmoni sono tesi allo spasimo, la guarnizione in pile a tre strati assorbe il sudore. La ventilazione del telaio è eccellente e l'efficacia della doppia lente è potenziata dal trattamento antiappannamento e da un'ulteriore presa d'aria lungo il bordo superiore. Risultato: Ecco come la comodità si sposa alla visibilità. Le nostre maschere da neve sono nate per resistere alle sollecitazioni estreme e la valutazione EN ™ per gli impatti ottenuta da Ambush assicura protezione anche quando aggredisci la pista. La cinghia intercambiabile sulla montatura comoda e leggera in O Matter® è doppiata con silicone antiscivolo. La lente resistente ai graffi in Lexan® filtra i pericolosi raggi UV d'alta quota, mentre il sistema a lente intercambiabile ti permette di scegliere la soluzione più adatta al sole cocente o alla scarsità di luce. Telaio flessibile in O-Matter, vestibilità equilibrata (con o senza casco) grazie ai gancetti snodati in O Matter®, Protezione continua dall'umidità, assorbita dai tre strati della guarnizione in pile, doppia lente ventilata e trattata con tecnologia antiappannamento F2, il materiale per lenti Lexan® garantisce una protezione del 100% dai raggi UVA,UVB, UVC e dalla luce blu dannosa, ideale per visi di dimensione piccola o media. Tecnologia High Definition Optics®: è un insieme di tecnologie brevettate che permettono agli occhiali Oakley di soddisfare o superare gli standard di test dell'American National Standards Institute per la chiarezza ottica, la fedeltà visiva e la resistenza all'impatto. Tecnologia Dual vented lenses: attaccando due lenti insieme (una sopra l'altra), creiamo una barriera termica che permette di ridurre la formazione di nebbia sulla superficie interna.
Tetrabiblos
ISBN: , SKU: , AUTHOR: Ptolemy, Claudius / Ashmand, J. M. / Proclus, PUBLISHER: Astrology Classics, Claudius Ptolemy (c.100 - c.178 AD), of Alexandria, was one of the greatest philosopher/scientists of the ancient world. Among his books are the Almagest, Geography, Optics, Planispherium and Tetrabiblos. The earliest surviving version of Tetrabiblos is the paraphrase attributed to Proclus the Philosopher (). Tetrabiblos (literally, "four books") was long thought to be a complete survey of Greek astrology. Recent research suggests this not to be the case, but Ptolemy's work remains the foundation of western astrology. In particular, his persuasive use of the Tropical Zodiac, rather than the Sidereal, changed western astrology forever. Book 1 of Tetrabiblos defines various technical terms and supplies other information needed by the astrologer. Chapters 9, 10 and 11 detail the influence of fixed stars in various constellations. Book 2 is the astrology of nations and their rulers. Books 3 & 4 are devoted to Natal Astrology. Book 3, chapter 2, explains Ptolemy's method of rectifying the Ascendant. Chapter 10 gives a method for determining life expectancy. Book 4 deals with wealth, rank, employment, marriage, children, death, etc. Published editions of Tetrabiblos traditionally include extracts from the Almagest (a compendium of Greek astronomy), as well as "Ptolemy's Centiloquy," a list of aphorisms, the authorship of which is disputed. Many of the 100 deal with horary astrology. They have been studied by astrologers for centuries. Translations: Gardner () lists four English translations of Tetrabiblos. The first was by John Walley, . The second was Walley's translation, edited by Sibley and Brown, , which is said to be worthless. The third, by James Wilson (author ofthe famous Dictionary of Astrology), was published in . The fourth (this one, by far the best), was by J.M. Ashmand, . A fifth translation was made in by F.E. Robbins. Of these several translators, only Ashmand could claim to be both a Greek and Latin scholar as well as an experienced astrologer. We are honored to present Ashmand's translation to a new generation of students. Ashmand's dedication is to Sir Walter Scott (), author of Waverly, an historical novel about the Scots rebellion of . To Ptolemy's text, Ashmand adds his own preface, as well as a note on Mr. Ranger's Zodiacal Planisphere. Every serious astrologer, from the 3rd century to the present, has studied the Tetrabiblos. With the current revival of traditional astrology, it remains essential reading.
Obiettivo Samyang 35mm T1.5 AS UMC VDSLR x Fotocamere
Samyang 35mm T1.5 AS UMC VDSLR LensThe Samyang 35mm T1.5 AS UMC VDSLR lens is afast, wide angle, manual focus prime lens for full frame cameras, or afast standard prime when used on APS-C/DX sensors, available mounts forCanon, and Nikon fitThis VDSLR (Video DSLR) version has beendeveloped primarily for professional cine / movie making purposes. TheVDSLR version feature follow focus gearing and decoupled aperture, whichallow the user to smoothly and quietly change focus and aperture /depth of field whist filming, and link to professional follow focus camsystems.The Samyang is rated in T-Stops rather than F-stopswhich is usual for movie camera lenses. F-stop number expresses thespeed of the lens on the assumption that lens transmits 100% of theincident light. The T-number expresses the actual light transmission,which is more accurate, and is the standard in professional cine lenses.The Samyang 35mm T1.5 AS UMC VDSLR lens version is optically the same as the standard Samyang 35mm f1.4 AS UMC version. Producingsuperior resolution and sharpness throughout the image equal orexceeding lenses 3 times as expensive, the Samyang 35mm lens is truly aprofessional class lens at a affordable price.Suitable for fullframe and cropped sensors the 35mm focal length has universalapplications, the lens is bright / fast wide-angle lens perfect forlandscape, journalism and general shooting applications, including lowlight photography. When mounted on a camera with APS-C sensor, willbecome a popular, multitasking 50mm prime lens, perfect for generalphotography including low light photography.AT wide aperturesthe Samyang 35mm video lens provide beautiful bokeh, (the character ofout-of-focus areas) which is perfect for portrait type applications, orphotography where ultra smooth out of focus backgrounds or foregroundsis preferred. This technique helps to separate the subject from thebackground giving very pleasing and professional results in both filmand still photography. Aided by its 8 aperture bladed design, thesmoothness of the bokeh provided by the Samyang 35mm is excellent.Although bokeh character is a personal preference various independenttests and users rate the Samyang 35mm lens as one of the best lensesregardless of cost or manufacturer when it comes to its bokeh character.The optical design of the Samyang 35 mm T1.5 lens is twelve elementsarranged in ten groups and includes two elements with high refractiveindex, which helps reduces its weight and dimensions to a moderate levelfor a full frame capable lens. The inclusion of an aspherical opticalelement minimizes helps reduce lateral chromatic aberration, UMCmulti-layer coatings provides high contrast and faithful colourreproduction. The design incorporates floating lens elements allowing topreserve high image quality with minimum focusing distance. The focus ring features toothed rings compatible with professionalgeared follow focus systems available in the film industry and likewise atoothed, decoupled (de-clicked) aperture ring. Such modifications allowfor smooth and precise control over focus and aperture during videorecording / filming. This allows for ultimate manual control of focusand exposure when filming from one scene to another with different lightsource intensities, such as changing exposure values (EVs) from insideto outside, or even in-camera fade ins etc.The Samyang VDSLRversions can be used in still photography as well as for video purposes.There are increasing numbers of users using DSLRs for filming and HighDefinition (HD) video and manual lenses allows the user to change focus(focus pulling) and aperture during filming.Samyang 35 mm F1.4AS UMC has been designed with great emphasis on the smallest details toboth optics and workmanship, which place the lens among the bestphotographic products in its class.Supplied with front and rearlens caps, petal-type lens hood (which is reversible for transporting)and a soft lens pouch. Filter size 77mmSpecificationManufacturerSamyang OpticsModelSamyang 35 mm T1.5 AS UMCLens typewide angle to standardFocal length35 mmMaximum apertureT1.5Min apertureT22Angle of view63.4 deg. (42.5 deg. for APS-C)Min focusing distance0.3mNo. of diaphragm blades8Focus typeMF (Manual Focus only)Lens construction12 elements / 10 groups / 1 aspherical lensDimensions111mm x 83mmWeight~ 660gFilter Size:77mmAvailable mountsNikon