Binocular Brightfield or Fluorescence Microscope100W Gillett&Sibert Excellent

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Outstanding exampleof a G & S Conference Research Laboratory microscope, at least 45 years old,which has been used, but not very much. In the right experienced professional hands, albeit unpaid, this is a very capable microscope, with 100W of Halogen light available, controllable by rheostat and Field and Stage Condenser Diaphragms, all fully operational, the Koehler illumination is perfect. I will not sell this microscope to an inexperienced user, it will be virtually useless to you. Fluorescence techniques are traditionally ignored because they are believed to require mercury vapour ultra-violet light sources for illumination - expensive and can be dangerous - but, given a quartz halogen light source, only two filters and a fluorochrome are required for blue-light fluorescence work . I am quoting Keith Brocklehurst here, who freely (1999) gives encouragement and advice. It takes an experienced microscopist to follow this, but it is definitely ‘can do’. No delamination has occurred in the large FIRST Collecting lens of the Field Lens System which is unusual due to the heat over extended periods. I can resolve perfectly a Test Diatom Strew, using all Objectives and the flip top condenser, which is optically aok. The field collecting mirror is of the front surface reflecting type works perfectly and has been re-coated by www./vacuumcoatings. howtofindus.html , and gives the most ideal circumstances for maximum light output for very fine Fluorescence work. In the right hands this is a Very Fine Microscope, but needs care and skill to use it. The photographs are all of the actual microscope listed here.. It is very heavy, which reflects in the postal cost, over 12Kg unpacked. There are a few minor scuffs on the paintwork mainly caused by storage movement. The bulb looks in excellent condition, and all the electrics work at full volume. The excellent G&S Objectives will cover most of your needs, the G&S Flat (Plan) x40 is top class. The x100 Oil Objective is great for confirming a detail at higher magnification, such as Diatomes in Brightfield. Centration of the Field Diaphragm is immaculate and easy to achieve, and must be re-done each time the Objective power is changed. The stage and focusing controls are a pleasure to use. Aluminium reflective mirror coating renewed by vacuum deposition plus overcoating processing. Bulb 12V 100W. Thorn M28 A9 currently in situ plus two spare Osram HLX XENOPHOT 12V 100W The bulb filament is perfectly focused on the field mirror = perfect longitudinal image giving a good wavefront, beaten only maybe by a ribbon filament under the same Kohler lighting conditions as here. Two spare Osram HLX 64625 are supplied with l uminous flux of 3600 high intensity between 390-770 nm 50 hrs.at full 12 V which you are unlikely to use for extended periods. The HLX identifies lamps that employ xenon gas which reduces the rate of tungsten filament vaporization. /article/info%3Adoi%2F10.1371%2Fjournal.pone.0031638#s4 re halogen light for fluorescence studies. There are some marks on the stage, but no detriment to the smooth action & use of the stage, it is big enough to hold two slides for quick comparisons. Despite all the advantages above, it is basically also a superb microscope for general use. Comes with: Oculars 2 G&S Matched x10 in excellent condition. Flip Top Condenser G&S Achromat 100/1.30 160/Oil G&S Flat Field 40/0.70 160/0.17 G&S 10/0.28 160/0.17 G&S 5/0.15 160/- The stand is suitable for busy Laboratory work or Undergraduate/Postgraduate Laboratory work; it is very well engineered to deliver professional service in most environments. INCLUDING at HOME. I have 100% Positive Feedback, please read them. Please ask ANY questions. Non mainland UK buyers please ask for the freight cost to your destination, it may be less than that quoted , and possibly more , but can be checked via who I use mainly Parcelforce; Yod... read more

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