written like an advertisement . please help improve it by removing promotional content and inappropriate external links and by adding encyclopedic content written from a neutral point of view . march 2012 learn how and when to remove this template message rodenstock gmbh type gmbh industry ophthalmic optics founded 1877 headquarters munich germany products lenses and frames website 1 2 rodenstock gmbh german pronunciation o dn t k is a german manufacturer of ophthalmic lenses and spectacle frames . the company which was founded in 1877 is headquartered in munich . it has a worldwide workforce of approximately 4 200 and is represented in more than 80 countries with sales subsidiaries and distribution partners . rodenstock maintains production sites for ophthalmic lenses at a total of 14 locations in 12 countries . contents 1 history 2 rodenstock generations 3 ophthalmic products 3.1 own brands 3.2 licenses 4 camera lenses 4.1 small format camera lenses 4.1.1 euron 4.1.2 eurygon 4.1.3 heligon 4.1.4 heligaron 4.1.5 ronar 4.1.6 rotelar 4.1.7 yronar 4.1.8 ysarex 4.2 large format camera lenses 4.2.1 geronar 4.2.2 eurynar 4.2.3 grandagon n 4.2.4 apo grandagon 4.2.5 sironar n 4.2.6 sironar s 4.2.7 apo sironar n 4.2.8 apo sironar s 4.2.9 apo sironar w 4.2.10 macro sironar n 4.2.11 apo macro sironar 4.2.12 apo ronar 4.2.13 tiefenbildner imagon 4.3 digital camera lenses 4.3.1 apo sironar digital 4.3.2 apo macro sironar digital 4.3.3 apo sironar digital hr 4.4 enlarging lenses 4.4.1 omegaron 4.4.2 rogonar 4.4.3 rogonar s 4.4.4 rodagon 4.4.5 rodagon g 4.4.6 rodagon wa 4.4.7 apo rodagon n 4.4.8 apo rodagon d 4.4.9 apo rodagon r 4.4.10 apo ronar 4.4.11 apo ronar l 4.4.12 apo ronar cl 4.4.13 apo gerogon 4.4.14 apo gerogon s 4.4.15 rodenstock klimsch apo ronar 4.4.16 rodenstock klimsch apo ronar l 4.5 hawk anamorphic lenses 4.6 slide projector lenses 5 external links 6 references history edit the foundation for rodenstock s development was laid in 1877 by josef rodenstock with his workshop and shop for lenses frames barometers and measurement instruments in w rzburg . in 1880 he developed his first patented products diaphragm lenses . two years later he started exporting internationally and founded his own production sites . since 1883 the company s headquarters is located in munich . in the new millennium the ophthalmic optics company quickly developed from a small tradesman shop into a modern industrial enterprise . for example the first bifocal lenses came from rodenstock as did uv absorbing lenses . in addition to the production of lenses the third generation put special focus on the manufacture of frames . in 1955 rodenstock sold more than one million of them . other innovations followed like for example self tinting phototropic lenses and the first progressive lenses developed by the company the progressiv r which was an immediate success in the 1980s . in the 1990s the unique selling point as a manufacturer of lenses and frames from a single source was consistently developed . through continuous innovations rodenstock further expanded its market share during that time . in 2000 the company landed a real coup in the field of individual progressive lenses with the product impressionilt . rodenstock invented the modern progressive lens . in 2000 the precision optics division rodenstock precision optics was sold to linos ag which itself was subsumed by qioptiq group in 2010 making rodenstock precision optics a brand of qioptiq . 1 the eyeglasses division is now owned by the european holding company bridgepoint . 2 these independent entities still operate with the same stylized r logo . rodenstock generations edit josef rodenstock 1878 1905 on 1 january 1878 josef rodenstock 32 a peddler of self designed measuring instruments and spectacle frames from thuringia began business operations together with his brother michael of the company g. rodenstock which had been founded in w rzburg in 1877 . alexander rodenstock de 1905 1953 alexander rodenstock joined the company at the age of 22 in 1905 . he had given up his studies of physics and economics at the urging of his father and started to prepare to take over the management of the family company ; he did so in 1919 . rolf rodenstock 1953 1990 rolf rodenstock had a diploma in general business a doctorate and a professorship . he took over the helm of the family company from his father in 1953 . he supervised the reconstruction of the company and rodenstock s own economic miracle and was considered one of the most respected corporate personalities of the still young federal republic . randolf rodenstock de 1990 2003 randolf rodenstock joined the company in 1976 and initially managed the company together with his father following his study of physics at munich university and a subsequent mba at the insead management school in fontainebleau france . he took over general responsibility for the company in 1990 and focused the company on the demands of increasing industrial globalization . ophthalmic products edit more than 135 years of tradition experience and the associated know how have made rodenstock into one of the most important manufacturers of lenses and frames . rodenstock is the only brand that delivers spectacles from a single source with frames and lenses as a complete provider and is the inventor of the first individual progressive lens impression as well as the technology eyelt . the frames collection of rodenstock has been allocated with more than 50 awards . the competence for both ophthalmic lenses as well as for frames makes rodenstock into a unique brand in ophthalmic optics because it can offer spectacles wearers the complete spectacles system from a single source . own brands edit rodenstock licenses edit porsche design dunhill mercedes benz eyewear baldessarini camera lenses edit rodenstock abandoned the branch of production of camera lenses . small format camera lenses edit euron edit this section needs expansion . you can help by adding to it . may 2008 a 3 element 3 group design used for 8 mm motion picture cameras . 37.5 mm f 2.8 eurygon edit this section needs expansion . you can help by adding to it . may 2008 a 7 element design . for 35 mm format retina eurygon 30mm f 2.8 retina eurygon 35mm f 4 see also list of rodenstock retina dkl mount lenses heligon edit this section needs expansion . you can help by adding to it . may 2008 a 6 element design . 12.5 mm f 1.5 for 35 mm format retina heligon c 35 mm f 4 retina heligon c 35 mm f 5.6 retina heligon c 50 mm f 2 retina heligon c 50 mm f 2.8 retina heligon c 80 mm f 4 see also list of rodenstock retina convertible lenses retina heligon 50 mm f 1.9 see also list of rodenstock retina dkl mount lenses heligaron edit this section needs expansion . you can help by adding to it . may 2008 a 6 element design used for 16 mm motion picture cameras . 6.5 mm f 1.6 ronar edit this section needs expansion . you can help by adding to it . may 2008 used for 8 mm motion picture cameras . 12.5 mm f 1.9 rotelar edit this section needs expansion . you can help by adding to it . may 2008 a 5 element design . 180 mm f 4.5 for 35 mm format retina rotelar 85mm f 4 retina rotelar 135mm f 4 see also list of rodenstock retina dkl mount lenses yronar edit this section needs expansion . you can help by adding to it . may 2008 a 4 element 4 group design . 135 mm f 3.5 ysarex edit this section needs expansion . you can help by adding to it . may 2008 lenses for graflex xl camera system polaroid land camera . single coated lanthium glass 95 mm f 3.5 127 mm f 4.7 150 mm f 4.5 for 35 mm format retina ysarex 50mm f 2.8 see also list of rodenstock retina dkl mount lenses large format camera lenses edit rodenstock has a long history of manufacturing lenses for large format cameras and has several lines of lenses . geronar edit the least expensive of the rodenstock lenses these 3 element 3 group designs have a 60 angle of view and perform best when stopped down . 150 mm f 6.3 for 4 5 in 210 mm f 6.8 for 5 7 in eurynar edit as a major product pre war anastigmat 4 element 4 group lens it was replacing the imagonal in 1909 . their formula was changed from double gauss to dialyt somewhere between number 116.000 and 239.000 but there were still some double gauss eurynar s where a greater angle was necessary . the lens collector s vade mecum m. wilkinson and c. glanfield is giving 1924 as the date for this change . at 1930 there was also a double anastigmat eustigmat 1 6.8 135mm which looks like a double gauss eurynar . kadlubek s lens catalogue is showing up 13 sizes from 90mm to 600mm with f4 .5 f5 .4 f5 .6 or f6 .8 ; the vade mecum is listing sizes from 50mm to 600mm and additional openings f3 .5 f3 .8 f4 .0 and f6 .5 . typically 135mm is used for 9x12cm 21cm for 13x18 7x5in 42cm for 10x8in 48cm for 12x10in and 60cm for 15x12in . grandagon n edit the grandagon lines are rodenstock s wide angle lenses . with an angle of view of 105 these 8 element 4 group lenses are the standard wide angles of the rodenstock line . in their respective focal lengths they are among the fastest wide angles available from any manufacturer . the 90 ; mm f 6.8 by contrast to the rest of the line is a 6 element design . 65mm f 4.5 for 4 5 75mm f 4.5 75mm f 6.8 90mm f 6.8 90mm f 4.5 for 5 7 115mm f 6.8 155mm f 6.8 for 8 10 200mm f 6.8 for 11x14 3 apo grandagon edit the apo grandagon line is apochromatic incorporating ed glass elements . this series has a 120 angle of view but the extremely short focal lengths only cover mostly medium format image sizes . designs are 8 elements in 4 groups . 35mm f 4.5 for 6 9 cm 45mm f 4.5 for 6 12 cm 55mm f 4.5 for 4 5 in 4 sironar n edit this section needs expansion . you can help by adding to it . march 2014 sironar s edit this section needs expansion . you can help by adding to it . march 2014 apo sironar n edit the apo sironar n line is a 6 element 4 group apochromatic design for general photography . angle of view is 72 . 100mm f 5.6 for 6x9cm 135mm f 5.6 for 4 5 150mm f 5.6 180mm f 5.6 for 5 7 210mm f 5.6 240mm f 5.6 300mm f 5.6 for 8 10 380mm f 6.8 480mm f 8.4 for 11x14 480mm f 9.0 5 apo sironar s edit these 6 element 4 group lenses are an update to the apo sironar n line incorporating a larger angle of view 75 and extra low dispersion ed glass elements to further reduce chromatic aberrations . light fall off at the edges of the field has also been reduced from the sironar n lenses . 135mm f 5.6 for 4 5 150mm f 5.6 180mm f 5.6 for 5 7 210mm f 5.6 for 8x10 240mm f 5.6 for 8x10 300mm f 5.6 for 8 10 360mm f 6.8 6 apo sironar w edit 150mm f 5.6 for 5x7 210mm f 5.6 for 8x10 300mm f 5.6 for 11x14 7 macro sironar n edit 300mm f 5.6 for 11x14 at 1 1 8 apo macro sironar edit this line of 6 element 4 group macro lenses is optimized for reproduction ratios from 1 5 to 2 1