{"product_id":"microscope-eyepiece-reticules-graticules-g25-walton-beckett-1996","title":"Microscope Eyepiece Reticules (Graticules) G25 Walton \u0026 Beckett 1996","description":"\u003ch1\u003eMicroscope Eyepiece Reticules (Graticules) \u003c\/h1\u003e\n\u003ch1 class=\"text-secondary\"\u003eG25 Walton \u0026amp; Beckett 1996\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEyepiece Reticle with Walton\/Beckett (1996) for Asbestos. All with calibration factor of 4 for use with 40x objectives.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBased on the G22, the G25 is produced to a new design by the Institute of Occupational Health.\u003c\/p\u003e\n\u003cp\u003eIMPORTANT NOTE. The circle on these Walton \u0026amp; Beckett reticles must represent 100 microns at the stage and each one must be manufactured to suit the individual instrument. Therefore, details should be provided with your order of :- Calibration factor, if known or Objective magnification, eyepiece magnification, diameter of reticle disc required, microscope make and model. All Walton \u0026amp; Beckett reticles are normally used with 40x objectives giving a calibration factor of 4. In some microscopes there is also an additional 1.25x magnification to give a total objective magnification of 50x - these will have a calibration factor of 5. All standard Walton \u0026amp; Beckett reticles are supplied with a calibration factor of 4. Other calibration factors are made to special order. These reticles will require a calibrated stage micrometer to verify the sizes - See\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.graticulesoptics.com\/products\/stage-micrometers-calibration-scales-grids\/stage-micrometers-professional-range\/ps12-stage-micrometer-01mm0002mm\"\u003ePS12\u003c\/a\u003e . For phase contrast verification see also\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.graticulesoptics.com\/products\/stage-micrometers-calibration-scales-grids\/hsenpl-slide\/s84-hsenpl-mkii-test-slide\"\u003eS84\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eLine Thickness\u003c\/span\u003e\u003cbr\u003e0.010mm +\/-0.002mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eGlass Type and Thickness\u003c\/span\u003e\u003cbr\u003eSoda Lime 1.5mm thick\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eOverall Tolerance\u003c\/span\u003e\u003cbr\u003e+\/-0.003mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eDiameter Tolerance\u003c\/span\u003e\u003cbr\u003e+0\/-0.1mm\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"text-primary\"\u003eOrientation\u003c\/span\u003e\u003cbr\u003eCorrect reading through glass\u003c\/p\u003e","brand":"Auckland Scientific","offers":[{"title":"16mm","offer_id":58333347578181,"sku":"01A16085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"19mm","offer_id":58333347610949,"sku":"01A19085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"20.4mm","offer_id":58333347643717,"sku":"01A20.4085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"21mm","offer_id":58333347676485,"sku":"01A21085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"23mm","offer_id":58333347709253,"sku":"01A23085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"24mm","offer_id":58333347742021,"sku":"01A24085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"24.5mm","offer_id":58333347774789,"sku":"01A24.5085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"25mm","offer_id":58333347807557,"sku":"01A25085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"26mm","offer_id":58333347840325,"sku":"01A26085","price":167.98,"currency_code":"GBP","in_stock":true},{"title":"27mm","offer_id":58333347873093,"sku":"01A27085","price":167.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/1930\/6309\/files\/G25.jpg?v=1782076664","url":"https:\/\/auckland-scientific.co.uk\/products\/microscope-eyepiece-reticules-graticules-g25-walton-beckett-1996","provider":"Auckland Scientific Ltd","version":"1.0","type":"link"}