The Portascope is an ideal tool for measuring critical distances and examining in detail the surfaces of opaque specimens that are relatively flat or tiny in size.
The Portascope has a x10 widefield eyepiece and a x4 RMS standard objective allowing an overall magnification of x40. The eyepiece incorporates a micrometer scale and has a focus skirt allowing the microscope to be placed directly over the specimen to be examined. Fine focus is by turning the collar in either direction. A rechargeable LED battery powered adjustable light source is attached to the front of the instrument that allows it to be fully portable with consistent illumination. The Portascope main area of application is in manufacturing quality control and a more detailed description can be found at this link.
Price £187.50 + vat
Brunel DM1 Stereomicroscope
This instrument is a good introduction to low cost, low power microscopy. It is a well constructed, full size, professional standard, monocular microscope. Working on the same principle as a stereomicroscope, the DM1 has been recommended by the Royal Microscopical Society as an ideal instrument for primary and secondary schools. Produces an erect non reversing image x20. With the use of alternative eyepieces, the magnification range may be extended from x10 to x40.
The DM1 has a pillar coarse focus, rack/pinion fine focus, and clutch adjustment. A micrometer eyepiece can be used for measurement. Working distance 80mm. Reversible black and white stage plate. Suitable for photography. Weight 1.3 kg.
The MX1 is the entry level microscope that provides a 3D image which can only be achieved with a binocular stereomicroscope. The stereo eyetubes are inclined at 45° to allow ease of use. The MX1 has x10 widefield eyepieces and two pairs of objectives that are turret mounted and allow magnification options of x10 (ideal for dissection) and x30. Focus is by rack and pinion with a pole stand allowing coarse adjustment.
x15 and x20 eyepieces are available as accessories which can give a wider range of magnifications up to x60.