This is a brand new microscope adapter for Canon PowerShot G10, G11, G12 digital camera. This set includes a 4X lens, a 58mm-52mm thread extended lens adapter and a 58mm lens adapter tube, plus a 23.2 mm- 30.5 mm microscope adapter. With 23.2 mm- 30.5 mm microscope adapter, it can be used for stereo microscopes with 30.5 mm eyepiece tubes.