1. Dino Digital Eyepiece -
There are two common sized apertures on a microscope: 23mm and 30mm. If you choose AM423 is perfect for 23mm Aperture.

If the inner diameter of your eyepiece slot is 30mm or 30.5mm then the AM423X is another versatile digital eyepiece. A unique feature it has is that it is capable of being adjusted for focus because of its tube design that has a 23mm aperture from top to bottom. Included with the AM423X are two adapters which are 30mm aperture and 30.5mm aperture.

If you have a unique aperture where other eyepieces would not fit. The AM423U would be useful and may able to meet your requirement The way the AM423U works is that it is made to be placed over an existing eyepiece that has a 36mm outer diameter or smaller. The AM423U is made to see through your current existing eyepiece which eliminates the need to figure out your microscopes eyepiece slot aperture.

The AM423 series eyepiece camera is designed with a zoom-in feature. The field of view (FOV) is approx. 12-14mm allowing for a high quality image of a reduced area.

2. Field of View -
The AM series eyepiece cameras are equivalent to a 20x eyepiece (most of traditional eyepiece are using 16x or 10x). However because the viewing area of the camera is essentially a rectangle, the viewing area of a AM423X is a zoomed in or enlarged version of a 50% field of view, compared to what you would see through an eyepiece (in relation to a 16x eyepiece) This is because what you see while physically viewing through an eyepiece, the area is a circle. The viewing area of a AM423U is similar to viewing a zoomed in area, 30% of your eyes view through the eyepiece (based on varied magnification of eyepiece 2x, 10x, or 16x). The AM423XC (with C-Mount Adapter) is approximately 40% of your eyes’ view through the eyepiece.

3. The AM423 Dino-Eye Eyepiece series perform measurements -
The measurement feature is included with the AM423 series. However the software is also exactly the same as the Dino-Lite handheld series. The eyepiece magnification is about 20x magnification.
The DinoCapture software was originally made for the handheld series so there is a software issue in calculating distance that would be fixed in the future but currently the software reads the eyepiece as APPROXIMATELY 72.5 x magnification.
If you are using a 4X objective lens your actual magnification is 290X (4 X 72.5)
If you are using a 10X objective lens your actual magnification is 725X (10 X 72.5)
It is best to calibrate the measurement with a calibration slide before measuring your actual specimen for best results.

4. Adjust Brightness and white balance -
Select Video setup and simply adjust the brightness using the Brightness feature.  This allows you to adjust brightness of the monitor/display only. 

To setting the white balance
Empty the stage so it would be viewing an empty field.
Then set the white balance by going to: Setup > Video source property > auto white balance
or
Manually adjust the color by adjusting the white balance and exposure to match a white surface such as white paper.

5. Transfer Captured image to word file -
Open a Word file and just drag the captured image to the Word file and release

6. Compare multiple images -
Double click any captured image and that image will open and be displayed.  Simply open and display multiple images then drag them into desired positions (ie; side by side) for comparison purposes.

7. To invert image / Circle area with image -
To invert image -
To view your image upside down, select Video Setup then select both the “mirror” and “flip” options.

Circle area with image -
First “capture” the observed image.  Then double click the captured image.  Then select “drawing” from tool bar options then chooses “ellipse” or “circle”.  Now left click and drag on area of image you wish to circle until desired diameter then release

8. Applications for Digital Microscope and eyepiece cameras?

Here are links and photo references:

- http://www.bigc.com/demo
- http:///www.bigc.com/demo/products.php

9. How do I choose a Microscope Eyepiece camera?
There is a variety of different digital eyepiece cameras available designed specifically for use with standard (monocular, binocular, or trinocular) microscopes.  The Dino “AM” and “EM” series are compatible with both the 23.2 and 30mm diameter ocular tubes found on most standard microscopes.  The installation of the eyepiece camera is the same for both versions and requires the removal of the microscope eyepiece from one of the ocular tubes and simply inserting the eyepiece camera.  Certain trinocular version microscopes may require a special “C” mount adaptor which comes with the EM130C model eyepiece camera. 

Furthermore, you need to consider certain performance features of the digital camera and determine if they meet your requirements.  You also need to ensure that your computer and operating system are compatible with the eyepiece digital camera software.  Other things to consider;
    * Determine the desired camera field of view.  The “EM” series has an 18mm FOV    while the “AM” series FOV is approximate. 3mm.  But the “AM” series provides a zoom feature for additional image magnification and enhanced clarity but in a reduced area.
    * The camera must match the objective lens par-focalization.
    * The camera must offer a sharp and clear image in true color.
    * The camera should offer video imaging at speeds of 15-30 frames /sec.

Finally, you should consider the software supplied with the camera. Some cameras come without imaging software.  Some come with basic imaging software with simple photo and video capturing functions only.  Some users require enhanced software features with measurement and other image processing capabilities such as the “ScopePhoto” software included with the “EM” series eyepiece cameras.

10. Maintenance and Cleaning
All digital microscopes and eyepiece camera internal components are sealed within the housing and require only occasional cleaning to maintain their optical integrity.

CAUTION!!!   Never disassemble or open the scope or camera body.  This will introduce dust and other contaminants and may cause permanent damage.