Ken-a-Vision Digital Microscope with 1.3 Megapixel Camera ,$895

design features include:

45 degree angle monocular head with built-in camera.

10x widefield eyepiece.

4x, 10x, 40x retractable, and 100x retractable objective.

Coaxial coarse and fine focus knobs.

20 watt halogen light source.

1.25 Abbe condenser.

30 frames per second display.

1280 x 960 SXGA full screen view.

Applied Vision Software for Windows.

http://www.seoenterprises.com/shop/product.php?productid=16235&cat=273&page=1

Ken-A-Vision T-1050 Digital Microscope ,$289

The Ken-A-Vision T-1050 Digital Microscope provides a magnification of 20x, 40x, and 100x and has a VGA resolution of 640 x 480. Ideal for teachers and students, in the classroom or in the field, the microscope has a camera that can be detached from the stand for handheld macro image capturing.

http://www.bhphotovideo.com/c/product/697069-REG/Ken_A_Vision_T_1050_T_1050_Digital_Microscope.html

Ken-A-Vision T-19541C Digital Monocular Comprehensive Scope 2 ,$674

Product Highlights
USB Computer Connection
View Specimens on Computer
Two 10x Widefield Eyepieces
1 Diopter
Built-In Camera
Variable Light Control
Mechanical Stage
Protective Coating on Optics
100xS Oil Immersion Objective Lens
Adjustable Light Dimmer

http://www.bhphotovideo.com/c/product/697057-REG/Ken_A_Vision_T_19541C_T_19541C_Digital_Monocular_Comprehensive.html