Crown-glass meniscus lenses Meniscus lenses have one face curved inwards and the other curved outwards. Ophthalmic meniscus lenses offer a wide range of powers at low cost. The crown-glass meniscus lenses are stocked in standard 60mm diameter with a moulded edge and in 25mm diameter, which has an edged, finish and are centred.
Knight Optical > Lenses > Meniscus lenses - Crown Glass Positive Type > 65 diameter (mm) Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT Bulk Discounts! Where (B) appears next to a price below, bulk prices are available, click the (B) button to view! PDF Part No. Focal length (mm) Back focal length (mm) Back vertex power (diopter) Price Qty Buy LCM20065 207 200 5 £9.10 LCM25065 257 250 4 £8.10 LCM33365 340 333 3 £8.50 LCM40065 407 400 2.5 £8.50 LCM50065 508 500 2 £8.50 LCM57065 580 570 1.75 £8.50 LCM66765 674 667 1.5 £8.50 LCM80065 809 800 1.25 £8.50 LCM100065 1010 1000 1 £8.50 LCM133365 1346 1333 0.75 £8.50 LCM200065 2019 2000 0.5 £8.50 LCM400065 4034 4000 0.25 £8.50 Knight Optical > Lenses > Meniscus lenses - Crown Glass Positive Type > 65 diameter (mm)
Specification   Material: B270 Material Data: (see materials section) Diameter: +0.0 / -0.125 ( 25mm dia) ± 1mm ( 60mm dia) Back Vortex Power: (=1/back F.L) ± 0.06D ( 4D) ± 0.12D (> 40D) Surface Quality: <60-40 scratch/dig (see quality section)
Specific requirements We can manufacture Crown-glass Meniscus Lenses to any focal length at short notice, so if your requirements are not listed please contact us by telephone/ fax or email: stockrequirement@knightoptical.co.uk Coating Crown-glass meniscus lenses are uncoated, however a coating can be applied at short notice (see coatings section) Options available   · Mounting (25mm dia only)   · AR Coating   · Stock lenses can be edged to smaller diameters See also High Index Meniscus Lenses: Meniscus laser lenses Negative Meniscus Lenses: Meniscus negative lenses Cylindrical Meniscus Lenses: Meniscus cylindrical lenses