I like
this usb microscope.
Image CMOS Sensor
Controller High Speed DSP(Diver Free available)
Focus Range 0mm~40mm
Video Capture Resolution 0.3M
Light Source In-built White Light LED x8 PCS
Still Image Capture Resolution:640*480
Frame Rater 30 f/s Under 600 LUX Brightness
Digital Zoom 5X Sequence Mode
Brightness Control Manual adjustment
Magnification Ratio 50X~500X
Power Supply USB Port(50V DC)
USB 2.0 & USB 1.1 Compatible
Operation System Win XP, Vista, Win7 32 bit and 64 bit

Haste is Waste.