31mm F1.8 Limited Pentax DA and DA lenses are the current lens line for Pentax Digital single lens reflex camera digital SLR cameras . They use the Pentax K sub AF sub Mount. All of these lenses have ... lenses are also made by third party companies. History Takumar lenses were primarily supplied ... began supplying lenses under the Pentax name in the early 1970s, using a bayonet K mount. In addition ... adapter ever made, and thus providing, countless lens possibilities. 35mm and 645 lenses ... to be purchased. This is advantageous as any lens can be used with full SR functionality, and the lenses ... feature that sets Pentax lenses apart from other manufacturers is that many of their top line lenses ... and wet locations. Pentax currently provides weather sealed premium lenses up 300mm, and by special order, the FA 600mm. The largest lens produced by Pentax was the Reflex 2000mm, with non mirrored lenses ... party lenses for Pentax cameras. Mounts Main article Pentax K mount Lens designations File Pentax SMC M 50mm f2.jpg thumb right Pentax SMC M 50mm f2 SMC lenses The first generation of Pentax K mount lenses with the SMC coating, these were exclusively manual focus lenses with no automatic features. M lenses The M series of lenses followed on from the earlier SMC lenses. As with the earlier lenses, these were manual K mount lenses without any automatic features. Some later Pentax digital cameras have had difficulty using the SMC and M lenses due to the lack of an automatic aperture setting. A lenses Another K mount lens, the A series of lenses saw the introduction of automatic aperture settings. The lenses had an aperture ring unlike the later DA series , and thus the aperture could be set .... F lenses The F series were autofocus lenses. They featured an aperture ring, which allowed the aperture to be controlled manually. Thus F lenses are able to be used on older cameras which do not support automatic setting of the aperture, such as the Pentax K1000 . FA lenses File Pentax SMC FA ... more details
Cleanup date March 2008 The Visby lenses are a collection of Lens geometry lens shaped manufactured objects made of rock crystal quartz found in several Viking graves on the island of Gotland , Sweden, dating from the 11th or 12th century. Some were in silver mounts with filigree , the mounting covering the back of the lens, and were probably used as jewellery it has been suggested that the lenses themselves are much older than their mounts. ref name schmidt cite journal last Schmidt first Olaf authorlink coauthors Karl Heinz Wilms, Bernd Lingelbach title The Visby Lenses journal Optometry & Vision Science volume 76 issue 9 pages 624 630 publisher location date September 1999 url http www.kleinesdorfinschleswigholstein.de buerger oschmi visby visbye.htm issn doi id accessdate ref Some of the lenses ... title Swedish Vikings used Optical Lenses journal The Optician volume issue pages 459 469 publisher ... curve is very similar to modern aspheric lenses as used in spectacles. ref name schmidt Description The lenses are bi aspheric and have excellent imaging properties. Their surface appears to be an oblate ... obviously made on an early form of lathe. ref The best example of the lenses measures convert ... resolution of 25 30 m. The Visby lenses provide evidence that sophisticated lens making techniques ... such lenses was restricted to only a few craftsmen, and perhaps a single person. It has been suggested that the lenses were not produced by the Vikings, as there are hints that they were in fact produced ... at Fr jel on Gotland in 1999 discovered evidence of local manufacture of beads and lenses from rock crystal, with unworked pieces of crystal coexisting with partially finished beads and lenses. ref ... Re9BAK.html doi accessdate ref Proposed uses Various uses have been proposed for the lenses They may ... German, includes pictures of all the lenses found at Visby http www.leinroden.de makeframe.html ... artefacts Category Viking Age Category Lenses da Visby linserne it Lenti di Visby sv Visbylinserna ... more details
Infobox Album See Wikipedia WikiProject Albums See Wikipedia WikiProject Albums Name Lenses Alien Type Album Artist Cymbals Eat Guitars Cover Lenses alien alt.jpg Released August 30, 2011 Recorded 2011 ... album Why There Are Mountains br 2009 This album Lenses Alien br 2011 Next album Misc Extra album cover Upper caption Original cover Type studio Cover Lenses alien.jpg Lower caption Lenses Alien is the second ... . ref name lensesalienrelease http www.barsuk.com shop bark118 Cymbals Eat Guitars lenses alien . Barsuk ... . Under the Radar magazine Under the Radar . 7 March 2011. Retrieved 6 August 2011. ref Lenses Alien ... 2011. ref Musical style Many critics compared Lenses Alien to 90 s indie rock bands such as Superchunk ... guitars lenses alien,61048 Cymbals Eat Guitars Lenses Alien . The A.V. Club . 30 August 2011. Retrieved ... eat guitars lenses alien 2600 Cymbals Eat Guitars Lenses Alien . Slant Magazine . 29 August 2011 ... lenses alien barsuk Cymbals Eat Guitars Lenses Alien Barsuk . Spin Magazine Spin . Retrieved ... . ref name allmusic Heaney, Gregory. http www.allmusic.com album lenses alien r2222540 review Lenses .... http www.nme.com reviews cymbals eat guitars 12266 Album Review Cymbals Eat Guitars Lenses Alien ... lenses alien review Cymbals Eat Guitars Lenses Alien review . The Guardian . 18 August 2011. Retrieved ... pitchfork.com reviews albums 15757 lenses alien Cymbals Eat Guitars Lenses Alien . Pitchfork Media ... Magazine rev8Score rating 4 5 ref name slant rev9 Spin Magazine Spin rev9Score 8 10 ref name spin Lenses ... music lenses alien critic reviews Critic Reviews for Lenses Alien . Metacritic . Retrieved ... be content to release the same album again and again, making Lenses Alien an album that s not only ... inventive music, something Cymbals Eat Guitars comes very close to achieving on Lenses Alien ...?ticker Cymbals Eat Guitars Lenses Alien . Drowned in Sound . 23 August 2011. Retrieved 23 August ... 2011 09 album review cymbals eat guitars lenses alien Album Review Cymbals Eat Guitars Lenses Alien ... more details
manually focused film camera optical lenses to the United States . Kino Precision was originally ... for 35mm film 35mm 24x36mm film format camera lenses. These lenses were offered in a variety of camera ... some of the now famous Series 1 manual focus lenses under contract for Vivitar , a U.S. lens distributor of after market film lenses for 35mm cameras. However, after the positive reception from consumers on Vivitar Series 1 lenses, the company believed the time was right to successfully market lenses to fit existing 35mm Japanese film cameras under their own brand, Kiron. Kiron soon became ... of 100mm focal length macro lenses, FOTO found the Kiron 105 2.8 macro outperformed both the Micro Nikkor 105mm 2.8 AIS and Tokina 90mm 2.5 macro lenses. ref , the 28 210mm 4.0 5.6 and the 3.8 5.6 varifocal zoom, and the 28 85mm 2.8 3.8 varifocal macro zoom lenses were praised in contemporary ... A Look Back At Lenses , 11 April 2009 ref Although reasonably priced for the level of quality offered, Kiron manual focus lenses were never economy level products, and were always made and assembled ... As such, Kiron lenses produced during the 1980s were normally priced only slightly below lenses offered ... and the Vivitar 105mm 2.5 1 1 macro lenses , and offered them for sale under the Vivitar brand. The increasing ... could no longer offer its lenses at a cost less than that charged by the camera manufacturers, who ... of CVI Melles Griot http optics.org news 2 6 14 ref Types Lenses for 135 film 35 mm film cameras ... Lenses were made in the following lens mount s Canon FD Konica AR Minolta MD Nikon F mount Nikon ... 006LQF What do you think of KIRON lenses? Category Photography companies of the United States de ... more details
Multiple issues refimprove August 2011 orphan February 2009 cleanup June 2007 Strategic lenses are a concept of strategic management . They are the four angles from which strategy can be viewed and implemented on a corporate level. Strategy As Design This lens views Strategy development as a process of logical determinism. Through careful evaluation of the firm s industry, environment and available resources, the optimal strategy and clear direction can be determined. ref name Nideborn cite web url http www.ie.lth.se Education Exjobb exjobb 2007 NidebornStrahle.pdf title Where Is the Semiconductor Industry Going? last Nideborn first Joakim coauthors Kristina Str hle date December 2007 accessdate 2008 09 27 format PDF ref This strategic process thus follows an analysis selection implementation process. Fundamental to this view is that the responsibility of strategy development is top management driven and that they are capable of choosing the optimal strategy for the business. Strategy As Experience Many proponents of the view of Strategy As Experience, such as Henry Mintzberg would argue that the design lens is often inaccurate as top level executives are too distant from daily developments of the organisation. According to Minzberg, strategic development should be adaptive, and divides it into intended, realised and emergent strategies. In this model, strategic development is the continuous adaptation of past strategies based on experience. ref name Nideborn In this view strategy is greatly influenced by taken for granted assumptions culture and involves large levels of bargaining and negotiation. Strategy as Experience carries with it a risk of the effect known as Strategic management Strategic change strategic drift as a result of failing to act upon environmental changes by being too path dependent on past activity. Remember the 4 lenses are a theory of strategic management ..., S. 29 46 DEFAULTSORT Strategic Lenses Category Management ... more details
T3i or EOS Kiss Digital X5 , one instead uses 50mm 85mm lenses, as these provide a 35 mm equivalent focal length of 80mm 136mm. Lenses that fit these criteria are Canon EF 50mm lens EF 50mm lenses F ... L. last Castleman edition 3rd citation url http www.the digital picture.com Canon Lenses Canon Portrait ... www.usa.canon.com app html EFLenses101 app portrait.html title EF Lenses 101 Applications Portrait ... Lenses for the Canon EOS system author Bob Atkins refend Canon EF lenses DEFAULTSORT Portrait Lenses Category Canon EF lenses ... more details
A collection of lenses a DSLR owner might have. These are three Olympus zooms 40 150 mm, 11 22 ... is on modern lenses for 135 film 35 mm film SLRs and for DSLRs with Image sensor format ... lenses The major advantage of SLR and DSLR cameras is the possibility of changing lenses, to select the best lens for the current photographic need, and to allow the attachment of specialized lenses. Film ... lenses have been produced, both by camera manufacturers who typically only make lenses intended for their own camera bodies and by third party optics companies who may make lenses for several different ... their DSLRs 100 compatible with their existing SLR lenses in the beginning, allowing owners of new DSLR s to continue to use their existing lenses and get a longer lifespan from their investment. Others, for example Olympus company Olympus , chose to create a completely new lens mount and series of lenses ... the MZ and ZX series of Pentax film cameras that do not work with some of the older lenses. ref http www.mosphotos.com PentaxLensCompatibility.html ref As implied by the above, lenses are only directly ... settings. The normal full stop f number scale for modern lenses is as follows 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, but many lenses also allow setting to half stop or third stop increments ... from 1 to 4. Fast lenses are typically larger than slow lenses for comparable focal length , and typically ... has a longer focal length, and images a small portion of the scene, making it seem closer. Lenses ... expressed in millimeters. But this specification is insufficient to compare lenses for different cameras ... equivalent focal length is 28 mm. This way of talking about lenses is not just limited to SLR and DSLR lenses it is very common to see this focal length equivalency in the specification of the lens ... DMC G1 Panasonic DMC G1 Types of lenses Zoom lenses Image Nikkor 28 200 zoom.jpg thumb Nikkor 28 200 ... and maximum value. Modern lens technology is such that the loss of image quality in zoom lenses relative ... more details
contamination of contact lenses but also to the overall difficulties of fungal identification in vitro ... of contact lenses include, but not limited to Cladosporium sfn Gray 1995 sfn Thomas 2003 Candida fungus ... to fungal contamination of contact lenses include, but not limited to, hygiene negligence such as sfn Ahmad 2010 Improper sterilization and disinfection of contact lenses sfn Ahmad 2010 use of contaminated lenses sfn Ahmad 2010 contaminated contact lens case sfn Ahmad 2010 contaminated contact lens solution sfn Ahmad 2010 wearing of contact lenses during eye infections sfn Ahmad 2010 and introduction ... 2003 Immediate treatment for fungal contaminated contact lenses is to discard the contact lenses in question and replace with brand new contact lenses. It is also recommended to replace the contact ... caused by contaminated contact lenses should seek immediate help from a certified professional ... 20contamination 20of 20contact 20lenses&f false Category Contact lenses ... more details
The following list of Nikon F mount lenses with integrated autofocus motors includes F Mount Photographic lens lenses which fully autofocus on Nikon F digital single lens reflex camera s without an autofocus ... 1 series with FT1 adapter. All Nikon Nikkor lenses designated with AF S introduced 1996 and the older ... have different or no designations for lenses including a focus motor. AF Lenses without an autofocus ... D60 Electronic Rangefinder Dpreview ref Listed here are nearly all recent autofocus lenses, because all manufacturers except Tokina have included focus motors in their Nikon compatible lenses for years. On February 12, 2012 the list is supposed to be complete, including 162 past and present lenses ... for integrated autofocus motors. The lenses are ordered by manufacturer and minimum and maximum .... All Nikon zoom AF lenses have focal length encoders added. Nikon AF I The lens contains an integrated ... frame Nikon DSLRs are able to detect DX lenses and crop the image accordingly. u Sigma DG Tamron Di ... for Nikon NIKKOR. All fullframe lenses can be fully used on DX DSLRs with the advantage of reduced .... These lenses are compatible with Nikon DSLR bodies without built in autofocus motors, but must be focused .... ref name kenrocklens All G type lenses are also D type. All IF The lens utilises an internal focus ... rarely available as new. Nikon F mount Nikkor Nikon Nikkor 66 lenses Image Nikkor 18 55 16 85 ... s. Typical AF S lenses have 7 10 contacts with VR 10 increased from about 5 contacts from AF or AF D lenses. ref name kenrocklens Image Nikkor AF S VR DX 18 200mm f3.5 5.6 with HB 35.jpg 350px thumb ... F 70 300mm lens Nikon Nikkor AF S 70 300mm f 4.5 5.6G VR IF ED. Commonscat Nikon lenses Nikon lenses ... Nikon Nikkor AF S and AF I lenses without modification . http www.momentcorp.com review nikon ... Can not mount lenses which jut out the F mount. Not recommended for use with Nikkor DX lenses ... ref group N name NT Nikon notes ref http www.nikonusa.com Find Your Nikon Camera Lenses index.page ... more details
wiktionarypar plano convex Plano convex may refer to Plano convex lenses, in optics see Lens optics Types of simple lenses The plano convex type of mudbrick , used by the ancient Sumerians disambig ... more details
Orphan date February 2009 Unreferenced date March 2008 Knapp s Rule states that Lens optics lenses placed at the anterior Focus optics focal point of the human eye eye , generally 15 mm in front of the eye, will create similarly sized images on the retina , whenever the disparity between the two eyes is due to a difference in axial length of the eyes. When a refractive error is corrected with spectacles spectacle lenses, the retinal images change size. It is magnified with Lens optics Types of simple lenses convex lenses and minified with Lens optics Types of simple lenses concave lenses . One difficulty, then, in prescribing glasses to an individual with a disparity in refractive error between the two eyes is that a disparity in image size between the two eyes may be created. There is some controversy as to the soundness of Knapp s Rule. References reflist optics stub Category Ophthalmology ... more details
for use Scleral lenses may be used to improve vision and reduce pain and light sensitivity for people ... of scleral lenses. Use in special effects Special effect scleral lenses have also been used ... out eyes in Underworld 2003 film Underworld and Underworld Evolution . These lenses tend to be uncomfortable .... The lenses cost around 300, are custom made to fit the wearer s eyes and can also be custom painted, although most companies only sell lenses with a pre designed look. There are many different designs available, from standard black lenses to flame effect eyes, as well as a lens that makes the whole .... If looked after, the lenses can be kept for approximately one year. It is recommended that they be worn ... Use of Scleral lenses in Keratoconus http www.eyefreedom.com slenses.php Scleral lenses http www.sclerallens.org Scleral Lens Education Society http bostonsight.org Boston Foundation for Sight http www.fashion contactlenses.com contact lenses Black Sclera Lenses.html Black Scleral Lenses http www.sclerals.com benefits.html Sclerals.com http www.9mmsfx.com 9mm Special Effects Lenses http keratos.free.fr english scleral lenses keratos.htm Scleral lenses used for ocular surface diseases Category Contact lenses Category Corrective lenses treatment stub ... more details
Image MC Mir 47M.jpg thumb right MC Mir 47M 2,5 20mm Image MIR 1W 2,8 37mm.jpg thumb Mir 1W 2,8 37mm Mir lang ru is a Soviet wide angle prime lens series with focal length s varying from 20 to 37 mm with 5 7 elements. The first variant was the Mir 1 and won the Grand Prix at Expo 58 in Brussels . Its construction was derived from the Flektogon lens by Carl Zeiss . The first element in this lens is in fact a disperser meniscus to reduce vignetting vignette effects when photographing with an open diaphragm optics diaphragm . External links http v3.espacenet.com origdoc?DB EPODOC&IDX US2793565&F 0&QPN US2793565 Flektogon Russian sources D.S. Volosov, Photographic optics theory, design basics, optical characteristics , 2nd revised edition, Moscow, Iskusstvo Publishing House, 1978. ru icon http www.zenitcamera.com archive lenses mir 1.html Mir 1 , http www.zenitcamera.com archive lenses mir 1.html Mir 1 , http www.zenitcamera.com archive lenses mir 5.html Mir 5 , http www.zenitcamera.com archive lenses mir 6.html Mir 6 , http www.zenitcamera.com archive lenses mir 10.html Mir 10 , http www.zenitcamera.com archive lenses mir 20.html Mir 20 , http www.zenitcamera.com archive lenses mir 24.html Mir 24 , http www.zenitcamera.com archive lenses mir 46.html Mir 46 , http www.zenitcamera.com archive lenses mir 47.html Mir 47 , http www.zenitcamera.com archive lenses mir 47.html Mir 47 , http www.zenitcamera.com archive lenses mir 51.html Mir 51 optics stub Category Soviet photographic lenses ru ... more details
The Gauss lens consists of two lens optics lenses in its most basic form, a positive Lens optics Types of simple lenses meniscus lens on the object side and a negative meniscus lens on the image side. The Optical power power of the positive element predominates, but the negative element corrects for chromatic aberration . See also Double Gauss lens Category Lenses optics stub ... more details
unreferenced date September 2009 Image optical train.jpg thumb 250px right An optical train showing the arrangement and angle of lenses and mirrors to guide the laser. Optical train also called optical assembly is the arrangement of lens optics lenses to guide Line of sight propagation line of sight and lasers. The position and angle of lenses are adjusted to guide a laser through the path required. optics stub Category fiber optics ... more details
eye stub Rigid gas permeable lenses are rigid contact lens es made of oxygen permeable polymers . Initially developed in the late 1970s, and through the 1980s and 1990s, they were an improvement over prior hard lenses that restricted oxygen transmission to the eye. Rigid lenses are able to replace the natural shape of the cornea with a new refracting surface. This means that a regular spherical rigid contact lens can provide good level of vision in people who have astigmatism or distorted corneal shapes as with keratoconus . However, they require a period of adaptation before full comfort is achieved. ref Terry et al., CLAO J 1986 15 305 ref References references External links commons Contact lens Do not add links to commercial organisations here. They will be removed. For more information, see Wikipedia s policy on external links at WP EL http keratoconusinfo.wordpress.com corneal lenses Use of rigid gas permeable lenses in Keratoconus Category Contact lenses ... more details
File PentaxK7 7.jpg thumb A digital SLR camera with a pancake lens. A pancake lens is colloquial term for a flat, thin lens short barrel , generally a normal or slightly wide prime lens for a camera. There are pancake lenses for two kinds of cameras Compact System Camera CSC and single lens reflex SLR . Motivation Pancake lenses are primarily valued for providing quality optics in a compact package. The resulting camera and lens assembly may even be small enough to be pocketable, a design feature which is usually impractical with conventional SLR bodies and lens assembiles. DpReview review of Olympus E P1, for instance, History An early example is the Zeiss Tessar of 1902. The design has seen a resurgence due to the growth of the mirrorless interchangeable lens digital camera so called EVIL camera market, notably the Micro Four Thirds system . In the 1960s and 1970s the Nikon GN lens was a notable example, while in the 1970s and 1980s pancake lenses were used in compact single lens reflex SLR cameras. ref Digital Photography Review DPReview forum http forums.dpreview.com forums read.asp?forum 1000&message 20033770 Re Why is a pancake lens a big deal? , Photomonkey, 10 01 14 PM, Thursday, September 14, 2006 ref ref http mydigitalcamera.us pancake lenses pancake lenses ref Gallery File SMC Pentax M 40mm pancake.jpg SMC Pentax M 40mm File Pentax DA 21mm F3.2 AL Limited.jpg Pentax DA 21mm f3.2 Gallery See Also Pentax K mount Micro Four Thirds system Micro Four Thirds lenses Micro Four Thirds Lenses Samsung NX mount NX lenses Samsung NX Lenses Sony E mount Available lenses Sony E mount Lenses Nikon 1 References reflist Category Photographic lens designs ... more details
Crown glass is either of two kinds of glass Crown glass window was a type of hand blown window glass. Crown glass optics is a type of optical glass used in lenses. disambig nl Kroonglas ... more details
wiktionary Kiron may refer to Kiron, Iowa , small city in Crawford County, Iowa Kiron Lenses See also Chiron disambiguation Chyron disambiguation disambig de Kiron ... more details
PAPB may refer to Polyaminopropyl biguanide , a preservative used in cleaning solutions for contact lenses St. George Airport Alaska ICAO location indicator PAPB , in St. George, Alaska, United States disambig ... more details
lenses are lens optics lenses that darken on exposure to Ultraviolet ultraviolet UV radiation. Once the UV is removed for example by walking indoors , the lenses will gradually return to their clear state. Photochromic lenses may be made of glass , polycarbonate , or another plastic . Technical details ... of these lenses achieve their photochromism photochromic properties through the embedding of microcrystalline ... lenses rely on organic photochromic molecules for example oxazine s and naphthopyran s to achieve the reversible darkening effect. The reason these lenses darken in sunlight but not indoors .... Automobile windows also block UV so these lenses would darken less in a car. Lenses that darken ... lenses are not entirely transparent, specifically they filter out UV light. This does not represent ... poses problems with variable thickness lenses in prescription glasses. With plastic lenses, the material ... m. Typically, photochromic lenses darken substantially in response to UV light in less than one minute ... NR rdonlyres CF53A0BE 1CDC 440D AD89 E39C800AD9AD 0 TechNotesPART4 p2328.pdf ref The lenses fade back to clear along a similar pattern. The lenses will begin to clear as soon as they are away from .... However, it normally takes more than fifteen minutes for the lenses to completely fade to their non ... that even in dark conditions photochromic lenses can absorb up to 20 of ambient light. Citation ... process, the higher the temperature, the less dark photochromic lenses will be. This thermal effect ... in very hot weather. Conversely, photochromic lenses will get very dark in cold weather conditions, which ... the triggering UV light, the cold lenses take longer to regain their clear color than warm lenses. A number ... to name a few offer products that use photochromism to make lenses that go from a dark to a darker ... and are not considered general purpose lenses. Advantages and disadvantages There are both advantages and disadvantages to photochromic lenses. The main advantage is that they will darken into a sunglass ... more details
advert date September 2011 The Canon Extension tube Extension Tube are the Extension Tube EF 12 II and the Extension Tube 25 II . The EF 12 II Max Diameter x Length is 66.5 x 12.3 mm and its weight is 2.3 oz 66 g . The EF 25 Max Diameter x Length is 66.5 x 27.3 mm and its weight is 3.4 oz 95 g and it comes with the LP811 Soft Case. Use & Compatibility Extension Tube EF 12 II is especially suited for close focusing with wide angle lenses. Compatible with all lenses, except 15mm f 2.8 fisheye, 14mm f 2.8L and MP E 65mm f 2.8. Extension Tube EF 25 II is recommended for lenses with a focal length of 50mm and up EF S 18 55mm can be used at middle and tele zoom settings . Both Extension Tube are compatible with EF S lenses, EF lenses and TS E lenses. See also Kenko company Kenko External links http www.the digital picture.com Reviews Canon EF 25mm Extension Tube II Review.aspx Canon EF 25mm Extension Tube II review at http www.the digital picture.com www.the digital picture.com Canon EF lenses Category Canon company Category Photography equipment ... more details
Infobox photographic lenses name Sigma 8mm f 4 EX DG maker Sigma Corporation feat special circular fisheye lens fisheye flength 8mm groups 6 elements 10 diaphragm 5 av horiz 180 av vert 180 av diag 180 filter rear Gelatin filter replace Sigma 8mm f 3.5 EX DG lens Sigma 8mm f 3.5 EX DG category Sigma lenses The Sigma 8mm f 4 EX DG is a photographic lens made by the Sigma Corporation . It is a circular fisheye lens for full frame cameras, and has been replaced by the Sigma 8mm f 3.5 EX DG lens Sigma 8mm f 3.5 EX DG . External links http www.sigmaphoto.com lenseslenses all details.asp?id 3255&navigator 4 Sigma 8mm f 4 EX DG official page photo stub Sigma lenses ... more details
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