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Canon EF-S 18-200mm f/3.5-5.6 IS Lens The Canon EF-S 18-200mm f/3.5-5.6 IS Lens is a very compact and lightweight wide zoom range lens, it covers the range 18-200mm and will be a very attractive travelling lens. This lens is specifically designed for the cameras with the EF-S lens mount (APS-C). Note that this lens is compatible with cameras that have the APS-C size sensors. If you want a wide range focal length lens for general photography and travelling where you do not wish to be continually changing lenses then this may be your lens choice. The lens does have its limitations, such as the aperture of f/5.6 at 200mm and may not be suitable for many photographers when shooting in low light as a consequence. If you are shooting still subjects in low light then the Image Stabilisation (IS) with this lens will give you some assistance in capturing subjects and keeping the shutter speed at a reasonable figure to freeze any camera movement. Keep in mind that the image stabilisation with this lens will not help with any subject movement, only camera movement. The size and weight of this lens is very reasonable for a lens covering this focal length range and with other constant aperture lenses or lower aperture lenses, several lenses would be required to cover the same focal length range. A wide range lens such as this is some what of a compromise in performance compared to other lenses with a shorter range of focal lengths. You will need to weigh up the advantages and disadvantages which is really size weight and convenience versus the additional weight and inconvenience of changing lenses if you use several higher performance larger lenses. Some of the lenses in this category are summarised as follows: - EF-S 10-22mm f/3.5-4.5 USM Lens – Ultra wide angle lens with variable aperture - EF-S 15-85mm f/3.5-5.6 IS USM Lens – Wide angle variable large aperture lens - EF-S 17-55mm f/2.8 IS USM Zoom Lens - Fixed large aperture low light zoom - EF-S 17-85mm f/4-5.6 IS USM Autofocus Lens – Wide angle variable large aperture lens - EF-S 18-135mm f/3.5-5.6 IS Lens – Wide focal length variable large aperture lens - EF-S 18-200mm f/3.5-5.6 IS Lens – Wide focal length range variable large aperture lens - EF-S 60mm f/2.8 Macro USM Lens – Low aperture macro lens My preference is to go with higher performance lenses as this will in general if you use good techniques, give you far better image quality which is what I generally aim for, but the choice is yours. See sample images from this lens on flickr. Specifications - Focal Length, 18 – 200 mm - Aperture Maximum, f/3.5 – 5.6 - Aperture Minimum, f/22 – 36 - Camera Mount Type, Canon EF-S - Format Compatibility, Canon APS-C - Angle of View, 74° – 7° - Minimum Focus Distance, 1.5′, 45 cm - Magnification, 0.24 times - Maximum Reproduction Ratio, 1:4.1 - 12 Groups, 16 Elements - Diaphragm Blades, 6 - Filter Thread, 72 mm - Dimensions (DxL), 3.1 x 4.0″, 7.87 x 10.16 cm - Weight, 1.31 lb, 595 grams - 4 stop Image Stabilizer (IS) - Two UD (Ultra-low Dispersion) elements - Aspherical elements - Super Spectra lens coatings and lens element shaping. Features - Image Stabilization, Yes - Autofocus, Yes - Tripod Collar, No
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Canon EF-S 18-200mm f/3.5-5.6 IS [napisao Gand. 6 Rujna 2008.][vijest pročitana 599 puta] Canon je obogatio svoju seriju objektiva EF-S svestranim novim modelom: objektivom EF-S 18-200mm f/3.5-5.6 IS. Taj objektiv nudi ekvivalentnu žarišnu duljinu od 29 do 320 mm i zum od 11x, što znači da je sada moguće koristiti samo taj snažan i lagan objektiv, bez potrebe za nošenjem više objektiva na snimanje. Objektiv EF-S 18-200mm f/3.5-5.6 IS namijenjen je korištenju isključivo s fotoaparatima EOS s postoljem za objektiv EF-S, što obuhvaća nove fotoaparate EOS 50D, EOS 1000D i EOS 450D te starije modele. Visokokvalitetna optika EF-S 18-200mm f/3.5-5.6 IS odlikuje se konstrukcijom koja se sastoji od šesnaest elemenata i dvanaest grupa. Njima su obuhvaćene i UD i asferične leće koje minimiziraju kromatske aberacije te jamče oštre detalje na čitavoj slici i pri svakom stupnju uvećanja. Podrška za žarišnu udaljenost od svega 45 cm fotografima pruža neograničenu fleksibilnost pri kadriranju. Optički stabilizator slike s četiri položaja brzine zatvarač Canonov optički stabilizator slike s četiri položaja brzine zatvarača, osmišljen posebno za specifični raspon žarišnih udaljenosti ovog objektiva, pridonosi smanjenju zamućenja slike koje se ponekad pojavljuje kada se snima bez stalka ili pri manjim brzinama zatvarača. Automatsko prepoznavanje panoramskih snimki jamči učinkovite performanse pri praćenju objekata u pokretu. Osim toga, budući da se IS sustav nalazi u objektivu, rezultati su vidljivi u tražilu tijekom kadriranja. Bez popratnih slika i odbljesaka Zbog odbijanja svjetlosti sa senzora za sliku na digitalnim fotoaparatima mogu se pojaviti popratne slike i odbljesci. Da bi se to spriječilo, na objektivu EF-S 18-200mm f/3.5-5.6 IS koriste se optički elementi premazani Canonovim patentiranim premazima Super Spectra te se tako dobivaju oštre, nedeformirane slike s prirodnom ravnotežom boja. Zbog nekog doista blesavog EU zakona dužni smo vas informirati da i naš Fotozine rabi cooki-e (kažu da su to “kolačići”) kao i valjda 99.999% stranica na kugli zemaljskoj. Za izvan nje nemamo informacija. S tim keksima mi ne otkrivamo vašu dob, visinu, debljinu, sposobnost kadriranja, lažiranje exifa i niš takvoga, već nam samo pomažu da se logirate i tak to. A kaj sad možete? kliketnut dole i reć poruci izazvanoj idiJotskim zakonom adio… (A mi smo vas zakonski informirali :P ;))