[Features] ● You can see clearly even if you take your eyes from the lens about 20 cm. - The flexible arm part is long, and the maximum size is A4 size. ● A wide field of view can be secured with a large-diameter lens of 36 mm. ●It is easy to adjust the focal point by fine-tuning the lens part, and it is possible to deal with objects such as substrates in three dimensions. ●Optical achromatic lenses are used.