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Lot 317
Becquerel Phosphoroscope By J. Duboscq a Paris, French, C. 1860, signed in script to the front 'J. Duboscq a Paris', consisting of a lacquered brass chamber with a hand turned large gear driving a pinion which in turn drives another gear which turns two internal shutters, at the top of the circular chamber is a small brass drawer into which is placed the mineral to be viewed, with large condensing lens to the rear, the instrument mounted on an oak stand Unveiling the Phosphoroscope: Exploring Phosphorescence in a Fascinating Way Let's step back to the year 1857, when physicist A. E. Becquerel introduced an intriguing scientific device called the Phosphoroscope. Its purpose? To unlock the secrets behind how long a phosphorescent Cyrstal or other material continues to emit its glow after being stimulated. The instument holds 2 rotating disks, each with evenly spaced holes. These holes are meticulously arranged, but they don't align perfectly between the two disks. Placed between them in a removeable drawer is a sample of the phosphorescent material, poised to reveal its brilliance. By directing light through the rear holes, the phosphorescent material awakens, glowing with captivating luminosity for a brief duration. The real intrigue, however, lies in the subtle rotation of the disks. Adjusting their speed allows scientists to measure the exact length of time the material continues to emit its alluring radiance. The Phosphoroscope is an intriguing Scientific Instrument that offers a unique glimpse into the world of phosphorescence. Through its precise mechanics and controlled experimentation, it allows scientists to delve into the captivating mysteries of glowing materials, shedding new light on their intriguing properties.
Lot 156
A Voigtlander Superb Medium Format TLR Camera, black, serial no. 235756, body G, shutter working, with Anastigmat Skopar f/3.5 7.5cm taking lens, optics VG, some light cleaning marks present, also with Anastigmat Helomar f/3.5 viewing lens, serial no. 835533, optics G-VG, some cleaning marks present, with camera strap,
Lot 250
A Sinclair & Co. Una 2¼x3¼" Mahogany Hand & Stand Camera, 1900, with Ross Xpres f/4.5 4¾" lens, black, serial no. 172720, in Newman Sinclair 'Perfect' shutter, body, VG, lens, VG, shutter working, also with Ross Homocentric f/6.3 4¼" lens, body G, optics G, with six DDS and maker's fitted case,
Lot 173
A Minox LX 'Gold' Limited Edition Sub-Miniature Camera, 1995, gold, serial no. 147, with Minox f/3.5 15mm lens, body, E, shutter fires but sticking slightly, lens, E, complete with wooden presentation box, paperwork and outer box Note: Limited Edition of only 250, engraved with the signature of Walter Zapp
Lot 61
A Selection of Lens Accessories for Leica Cameras, to include a Sommor Prismor 1.5 close-focus attachment with rangefinder & viewing window corrector, in maker's case, together with an AMG series V push-on interchangeable filter set, with close-up & colour filtration elements, together with a Leitz Leica E39 UV filter & a Stes. Tiranty Leica 85 filter,
Lot 64
A Good Leica IIIf 35mm Rangefinder Camera Outfit, to include a Leica IIIf, 1951, serial no. 548782, body G, shutter working, rangefinder contrast poor, viewfinder clear & bright, together with a Leitz Elmar f/3.5 3.5cm lens, serial no. 653802, body G-VG, optics G-VG, some light haze present, with front & rear caps, together with a Leitz Elmar f/3.5 5cm lens, serial no. 670234, body G-VG, optics G, some cleaning marks & light haze present, with front & rear caps, together with a Leitz Elmar f/4 9cm lens, serial no. 596726, body G-VG, optics G, some haze present, with hood & rear cap, also with a Wollensak Ser. II Velostigmat, f/4.5 127mm lens, serial no. 483570, body G, optics G, small scratch to inner optics, with front cap, together with a Leitz universal finder, three reloadable film cassettes in velvet-lined cases, & a Toth Duto 42mm slip-on soft-focus filter, all together in fitted outfit case, together with a book of photographs of receipts & service history for 548782 & other lenses, also with an instruction book in French,
Lot 255
A Mid 19th Century Stereo Tailboard Camera, English, c.1870, unsigned, constructed of French polished mahogany, with square edge bellows, with rack and pinion focusing, notches to rear of camera for septum (not present), with stereo landscape lenses engraved M P Tench , 153 Fleet St London, and numbered 1070 & 1071, with a single lens board and 4 DDS's
Lot 339
A Fine 2in Library Telescope By Ross & Co, English, c.1840, engraved in script around the eyepiece mount 'Andw Rofs & Co, 33 Regent St' the telescope on folding cabriole legs, with tall support terminating on a compass-type joint, with rack and pinion focus to eyepiece with 3 screw in objectives with sun and moon filter with eyepiece screw in cap and objective lens cap, in fitted French polished mahogany case, case width 77cm Andrew Ross, born in 1798 and died on September 8, 1859, he established his optical business in 1830, gaining recognition for his telescopes and microscopes. This specific telescope is an early achromatic example produced by Ross & Company. The inclusion of "& Company" in the signature indicates its production during the period when Ross was associated with Mr. Lister, a partnership that lasted from 1837 to 1842. Notably, the absence of a serial number is intriguing since Ross began using them in August 1842 after relocating the factory to 21 Featherstone Buildings, Holborn, according to Nuttall (Quek, Vol. 33, 1979). This shift coincided with the apparent end of Ross's business association with Lister.
Lot 263
A Dallmeyer Large Format Stigmatic Series 1 Soft Focus Lens, English, c.1880, engraved 'J H Dallmeyer, No.56169, London, No.3 Stigmatic Series I' the lens with iris diaphragm engraved F4 - F28, with rack and pinion focus, original lens flange/mount, lens hood and Thornton Pickard Shutter, with adjustable back lens arrangement for soft focus adjustment, lens 11.3cm tall
Lot 338
A 2in Library Telescope, English, c.1800, unsigned, the telescope on folding cabriole legs, with geared adjustment, tapered column with compass type adjustment to the top, with telescopic adjustment to the side ( missing pinion) telescope focus via rack and pinion with single drawer tube, eyepiece with sun filter, achromatic objective with lens cap, in distressed mahogany case, telescope body length 75cm
Lot 248
A Good Brass Bound Half Plate Field Camera By Sanderson, English, c.1900, ivorine (early Celoloid) plaque for 'THE SANDERSON H Ltd LONDON' and a brass plaque for 'REGULAR MODEL' the camera of typical format with single racked bed, Sandersons Patented front support, lens panel with Thornton Pickard shutter, with brass bound Beck Symmetrical lens with cap, in canvas bag with 4 mahogany DDSs
Lot 116
A Selection of Alpa Telephoto Camera Lenses, to include a Schneider Alpa-Tele-Xenar f/3.5 90mm lens, serial no. 4014920, body VG-E, optics G-VG, some very light cleaning marks to front element, in maker's lens tube marked Alpa Alnea with front & rear caps, together with a Scheider Slpa-Tele-Xenar f/3.5 135mm lens, serial no. 9071553, body VG-E, optics VG, with front & rear caps, together with two stacked adapters, Alpa to screw-mount & then screw-mount back to Alpa mount, also with an Alpa camera grip device, in VG condition, one tightening screw looks to have been replaced, together with a spare lens tube & a range of Alpa literature for Alpa reflex cameras,
Lot 122
A Selection of Foca Camera Lenses, to include a screw mount Oplar f/3.5 3.5cm lens, a bayonet Oplar f/3.5 3.5cm lens, in maker's tube, a screw mount Oplarex f/1.9 5cm lens, a bayonet Oplarex f/1.9 5cm lens, a bayonet Oplar f/3.5 9cm lens, & five variations of Foca Teleoplar f/4.5 13.5cm lenses, all optics in the lot are P-F, haze & fungus present, together with some filters & caps, together with a copy of Foca Historica by Jean Loup Princelle,
Lot 101
A Contax G1 35mm Rangefinder Camera, champagne, serial no. 086805, body VG, shutter working when batteries are inserted, AF & MF appear to work correctly, together with a Carl Zeiss Biogon f/2.8 28mm lens, serial no. 7860997, optics G-VG, some oxidization to lens mount on camera & lens, together with a Contax TLA 200 flash, working when batteries are inserted, with Flash case & instruction manuals,
Lot 1
A Leitz Wetzlar Leica M3 35mm Rangefinder Camera chrome, 1959, serial no.974996, witha Leitz Wetzlar Summicron f/2 5cm collapsible lens, 1954, serial no.1231508, shutter working, body F, scuffing and wear, lens F, moderate fungus, with a Metrawatt Leica-Meter MR exposure meter and Leica ever ready case
Lot 74A
A Voigtlander Bessa-T Heliar '101 Years' Rangefinder Camera,2001, black, serial no. 1014203, with Voigtlander Heliar f/3.5 50mm lens, chrome, serial no. 3060, body, E, shutter working, lens, VG-E, some light internal haze, complete with Voigtlander 50mm finder, caps, instructions and maker's inner/outer box
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70728 item(s)/page