Aspen Microscopes GTC20 Research Grade, Trinocular Biological Microscope with Infinity Optics and Koehler LED IlluminationThe Aspen GTC20 microscope represents a new generation of affordable but advanced instruments with the latest optical design and advanced build quality incorporating all the features you would expect to find in much more expensive microscopes.Featuring a super-widefield image (with 22mm FOV eyepieces), a safe design stage and an ergonomic and easy to carry stand with a variety of options as standard. Backed by a comprehensive technical and service support , the GTC20 sets a new standard for optical design, performance and affordability. Plan Achromatic 4x, 10x, 40x, 100x oil objectives . 10x EWF eyepieces. Mechanical Stage. LED Koehler Illumination.