Wizard of Wetzlar - Arthur Seibert . Arthur Seibert ( 1906- 1980) was Ernst Leitz lens designer from 1920 to 1947. In 1948 Seibert left Leitz and undertook the task of designing a subminature lens for Minox camera . Arthur Seibert was a great optics designer, his most famous designs were the five element Pentar lens of Minox II and the COMPLAN lens for Minox III/IIIs/B, and early Minox C. The Pentar and COMPLAN are still two of the sharpest subminature lenses-- in fact the sharpest of any commercial photographic lenses In 1951, Arthur Seibert formed his own optik company EMO-OPTIK Arthur Seibert emo Wetzlar West Germany Werk fur Elektronik und Optik Hornsheim Eck 11 35524 Wetzlar Germany 49/6441/72044 Many of EMO's products are masterpieces of optical design, for example Highly corrected EMO Wetzlar 5x Macromax loup Emoskop : this marvel is a telescope, a microscope and three loups all in a 2" tube. Octoskop : A combination loup with eight magnifications: 2x 4x 6x 10 x 14x 18x 20x 28 x . emoskop Emoskop is a combination of telescope, microscope and magnifier in a pocket package. It is the optical equivalent of a Swiss Army knife. EMO SEIBERT EMOSKOP The orginal emoskop has the following engraving on the tube \|||||||||||||||||| EMO SEIBERT Wetzlar/Germany EMO-SEIBERT emoskop The top end of the eyepiece has a milled band; the bottom of emoskop has two engraved chrome rings. The small black leather case fits the emoskop without the stand. The original EMO Seibert emoskop is the prettiest. It is also scarce. The Emoskop is made of metal , very compact, when assembled in to a microscope, it ss about 21mm in diameter and 42 mm long. ) () () A B C Emoskop consists of three lenses. Lens A,B,C each has its own housing Lens A is a cemented two element achromatic lens of negative power , it is the the eye piece of telescope and microscope. Lens A is mounted at one end of a tube, which goes into lens B tube. )( Eyepiece LOUP Lens B lens is a cemented two element achromat mounted at one end of outer tube. Lens B can be used by itself as a 5x loup () part B: 5 x loup Lens C is another cemented two element lens of 10x power . Lens C can be used as a 10x loupe by itself. () Part C: 10 x loup Lens B and lens C combines into a 15 x loup ()() B + C = 15x loup Great for examine Minox 8x11 negative TELESCOPE Eyepiece A and lens B together makes a 3x telescope )( () A + B = telescope This telescope is only 3 cm long can be held with two fingers-- the smallest telescope ever made. One interesting property of this tiny telescope is its focuses as close as 8". Not many regular telescope can focus that close. The following are some use for this vest pocket telescope Examine object under lathe at an arm's length safe distance Look at menu or newspaper at next table. Check title on top shelf in book store or library Look at the details of camera in display case behind the counter MICROSCOPE (25-30 X) All three lenses together make a 25x to 30 x microscope )( () () A + B+ C= microscope Ideal for examination of Minox 8x11 negative Examine fine details of stamp Check out bogus money--- with this very sharp microscope, finest details in paper money will be revealed in great sharpness, it is easy to distinguish bogus money from real Examine diamond and gem Examine micro-mount crystals Examine fine detail of yarn, silk and fabrics. Examine the dpi of printed picture in book/magazine Examie small insect Emoskop microscope has a great advantage over ordinary high power loup----- greater working distance. For example with a 22 x Peak loup, the working distance from the loupe to the a stamp is less than 10 mm; because the lens is too close to the object, it blocks light, and the object appears dim. This short working distance may be not relevant for viweing negatives or transparancies, but is important in examination of opaque objects, such as stamp, paper money, tiny mineral crystals from micromount etc. Emoskop in microscope mode has a working distance of 24mm, and the object appears brighter then any loupe SPECIFICATION Metal construction Five coated glass elements in three group Flat field achromatic Length Full length 42mm Microscope : working distance : 24mm (from front to object) 25x : 42mm 30x : 57mm Telescope 2.5x/teleloupe 3x Infinity : 34mm 30cm : 50mm Loup 5x 25 mm 10 x 9 mm 15 x 32 mm Diameter 21 mm Weight 28 g Genuine black leather case to hold assembled Emoskop (microscope) and the stand. Anodize aluminium body Variations of EMOSKOP Wetzlar EMO EMOSCOP SM emo Scop SM Wetzlar emo Germany No milled band on top No chrome ring at bottom Macrolon body Larger leather case to fit both emoskop and stand Saunders EmoScop In the 70s, Sauders Co in Rochester imported Emoskop and marketed it under the name EmoScop Emo Scop SM SAUNDERS Rochester Saunders EmoScop Difference between emo Emoscop and Saunders EmoScop: There is no "Wetzlar EMO Germany" on Saunders EmoScop, although it was made by EMO Wetzlar. Sauders EmoScop stand is a full cylinder, EMOSCOP stand is a cylinder with a quarter cut off for more light Saunder box has three slots: one for assembled Emoscop, one for acrylic stand and one for leather case emo emoscop has five slots: three places for the three lenses separately, one slot for stand one for leather case Haverhills Episcope The Emoskop was originally made in Germany by EMO-Optik. The production of Emoskop was discontinued a few years ago. According to a dealer in New Zealand, he saw the Emoskop at Photokina at late 198x, and imported it to New Zealand for distribution. New Emoskops are still being sold ( by stores specialized in loup, stamp, or fabric and yarn ) Haverhills in USA has a Emoskop clone made in China, and sold under Haverhills' own trade mark as Haverhills Episcope TM The workmanship of Episcope is excellent: anodized metal tubes are well made, with nice decorative milled ring on eyepiece and inlaid chrome ring on the 10x loup. Actually the Episcope looks very close to the original metal Seibert emoskop, with milled band and chrome ring accent. Optically the Havershill Episcope performs quite well, the images of loups, telescope and microscope are crisp and bright, without color fringing. I compare the Episcope vs the original EMO-Seibert emoskop in telescope/loup/and microscope mode, and do not see any difference in performance.