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DMC 2 Camera Features
The Polaroid DMC 2 Digital Microscope Camera captures high-quality digital color
images from light microscopes and other optical instruments. The camera uses a 2million-pixel, 11mm CCD (charge coupled device) to capture 14-bit linear RGB
images. It transfers these images in seconds to an IBM PC or Power Macintosh compatible computer in TIFF format with 1600x1200 or 800x600 pixels. On IBM PC compatible systems, an additional image size of 400x300 is available.
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Using the software provided with the camera, you can:
• Display a color viewfinder image on your computer screen.
• Choose resolution, exposure, sensitivity, color temperature, and other options.
• Automatically adjust exposure.
• Manually adjust color balance, brightness, contrast and sharpness.
• Verify focus digitally.
• Add a calibrated scale to the image.
• Add a title or other text to the image.
• Transfer the image to your image-editing application or hard drive.
• Capture a rapid sequence of images and select one for transfer to your computer.
Note: The DMC 2 software is compatible with DMC 2 and DMC Ie cameras.
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The camera has a SCSI connection requiring no frame-grabber or other special hardware or software. (The camera requires a SCSI host adapter, usually built into Macintosh computers. SCSI host adapters can also be easily added to PC-compatible
computers.)
Compatible with standard .63, 1:1 or larger c-mount adapters, the camera attaches
easily to microscopes for most types of transmitted-light and reflected-light microscopy.
Multiple DMC 2 cameras can be connected in a SCSI chain to a single computer simultaneously for capturing images from multiple instruments without moving the camera or reconnecting cables.
The camera also features a tripod mount, x-sync connection and remote shutter connection for use with standard c-mount lenses on a copystand or tripod.
Detailed camera specifications
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Taking Pictures
Typical Picture-Taking Sequence
1Turn on the camera.
2Start the DMC 2 software.
3Frame and focus the preview.
4Choose a capture area
5Choose color or grayscale preview.
6Rotate the image.
7Zoom the preview.
8Set exposure.
9Set sensitivity.
10 Select color temperature.
11 Select image type.
12 Select image size.
13 Verify sharp focus digitally.
14 Capture the image.
15 Enhance the image.
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Turning the Camera On
1Turn off the computer.
2Turn the camera power switch to on (1).
Power switch (on = 1)
3Verify that the green and yellow LEDs are on, indicating AC and termination
power are on.
Green LED
Yel lo w L ED
4Turn on the computer.
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Starting the DMC 2 Software
MacintoshWindows
Double-click Polaroid DMC 2.
The main DMC 2 window appears.
1 Select Programs from the Start menu.
2 Point to Polaroid Digital Microscope
Camera 2 and select Polaroid DMC 2.
The main DMC 2 window appears.
If more than one DMC camera is connected to the computer, you must select the camera to be used in this session. To select a camera, see Selecting a DMC Camera.
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Selecting a DMC Camera
If more than one DMC camera is connected to the computer, use these steps to select
the camera to be used in the current session:
MacintoshWindows
1 Click the Preferences button in
the main DMC 2 window.
2 Click Choose a DMC 2 in the
DMC 2 Preferences box.
3 Choose the SCSI address of the
camera to be used.
4 Click OK to activate the camera.
5 Click Save to close the DMC 2
Preferences box.
1 Click Set Preferences on the Tools
menu.
2 Click the Cameras tab.
3 Click the SCSI address of the camera
to be used.
4 Click OK.
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Framing and Focusing the Preview
1View the subject through the microscope eyepiece.
2Adjust subject position, focus and lighting according to the microscope instruc-
tions.
3If your microscope requires, manually switch the light path to the camera.
4If a viewfinder image is not visible in the DMC 2 software main window, click the
Preview button.
Note: If clicking Preview does not display an image, you may need to adjust expo-
sure or sensitivity before continuing.
Exposure adjustment instructions.
Sensitivity adjustment instructions.
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Choosing a Capture Area
You can capture the entire DMC frame or a smaller, selected area.
To capture an area smaller than the DMC frame:
1Adjust exposure to obtain an acceptable image on the Viewfinder Display tab of
the main DMC 2 window.
2Click the Region of Interest Selection tab.
3Select the size of the frame to be captured (3/4 or 1/2 frame) from the Capture
Area list.
A box defining the selected capture area appears on the image.
4Position the capture area as desired by dragging it.
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5Click the Viewfinder Display tab to view only the capture area. The values avail-
able in the Image Size box correspond to the capture area you selected.
6Continue with the picture-taking sequence.
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Choosing Color or Grayscale Preview
You can view the preview image in the DMC 2 main window in either color or grayscale. A color preview provides a more accurate representation of the final image,
while a grayscale preview refreshes faster.
To view a color preview image, select Color in the main DMC 2 window. To view a
grayscale preview image, deselect Color.
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Rotating the Image
To correct picture orientation, you can rotate the preview image 180 degrees
by clicking the rotate button.
When you rotate the preview image, the final image is also rotated.
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Enlarging the Preview
You can enlarge the view of the preview image for focusing and closely inspecting
detail while framing. Enlarging the view does not affect the final image.
To enlarge the preview image:
1Click the image to display the zoom and focus box.
2Drag the zoom and focus box to the area of interest.
3To zoom in, click . To zoom out, click .
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Setting Exposure Automatically
1If you have not done so, calibrate automatic exposure for the current lighting and
specimen conditions. See Calibrating Auto Exposure.
2Click the Auto button in the main DMC 2 window.
3Wait a few seconds for the DMC 2 software to optimize the exposure.
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Calibrating Auto Exposure
1Manually set exposure to the optimum position for the current setup. See Setting
Exposure Manually.
2Click Calibrate Auto Exposure on the To o l s menu.
3Click the Set button in the Auto Exposure Calibration box.
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Setting Exposure Manually
Drag the Exposure slider right or left to adjust the camera shutter speed for brightening or darkening the image.
Range: 20 milliseconds (far left) to 8 seconds (far right).
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Setting Sensitivity
Choose a sensitivity (camera gain) setting from the Sensitivity list:
• Low (ISO 25 equivalent)
• Medium (ISO 50 equivalent)
• High (ISO 100 equivalent).
The default setting is Medium (ISO 50 equivalent).
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Selecting Color Temperature
You can select one of the standard color temperatures to match your lighting:
• Tungsten (3200K)
• Daylight (5500K)
These color temperatures are appropriate for many lighting situations, but best
results are often obtained by creating and using a custom color temperature. This custom temperature appears as Custom in the Color Temperature list.
See Creating a Custom Color Temperature.
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Creating a Custom Color Temperature Setting
If the standard color temperature settings are inappropriate for your lighting, you can
create a custom color temperature setting based on the actual lighting.
To create a custom color temperature:
MacintoshWindows
1 Select Calibrate Custom Color Tem-
perature from the Color Temp popup
menu.
2 Obtain a properly exposed and
focused image in the DMC 2 preview
window.
3 Move the specimen to view a clear
area of the slide.
Next
1 Click Calibrate Custom Color Tem-
perature on the To o l s menu.
2 Obtain a properly exposed and
focused image in the DMC 2 preview
window.
3 Move the specimen to view a clear
area of the slide.
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Creating a Custom Color Temperature Setting (continued)
MacintoshWindows
4 Click Calibrate.
5 Wait for the Calibrate Color Tempera-
ture box to close.
6 To use the custom setting, select Cus-
tom from the Color Temp popup
menu.
4 Click Begin.
5 Wait for the Calibrate Custom Color
Temperature box to close.
6 To use the custom setting, select Cus-
tom from the Color Temperature
box.
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Selecting Image Type
You can select one of these image types for your final image from the Image Type box:
• 48-Bit Color (68.7 billion colors)
• 24-Bit Color (16.7 million colors)
• 16-Bit Grayscale (65,000 gray shades)
• 8-Bit Grayscale (256 gray shades)
The image type you choose affects the size of the image file. See Image File Sizes.
Note: Before saving images as 48-bit color or 16-bit grayscale, verify that other applications you intend to use support TIFF images in those formats. For example, Adobe
Photoshop version 5 supports 48-bit color images, but earlier versions do not.
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