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MegaVision Imaging Products


The sensor of the E427 is an 11 megapixel, 4008 X 2672, full 35mm form factor (36.1mm X 24.0mm) with integrated electronic shutter.

Interface plates are available for a range of technical cameras and medium format camera bodies.

The E427-i  provides the highest resolution possible in color mydriatic fundus photography.  Additional pixel resolution is not resolved due to the limitations of ocular media. In actual practice, the E427 offers just noticeable increase in resolution over the E3.

While  FA’s may be performed at 11 mpixel resolution, it is not recommended, as the amount of light per pixel with normal excitation strobe power is sufficiently low as to compromise image quality. When used to perform FA’s, the E427-i  may be binned to increase sensitivity at the expense of resolution.  The binned resolution of just under 3 megabytes provides good quality and reasonable sensitivity.  For the ultimate in image quality, a color E427 may be combined with a monochrome E3 (on fundus cameras which support 2 camera backs or if the backs are rotated between color and FA.

The E427 is available for most common fundus cameras.

E427-i Specifications


 Interline Transfer CCD

Pixel Size

 9  µm square

Max Resolution

4008(H) x 2672 (V)  ----  10.7 megapixels

Max Image Area

 36.1 mm (H) X 24.0 mm (V)  ----  43.4 mm diagonal


 3.25 Wide X 4 long X 1.5 deep  (8.3cm X 10.2cm  X 3.8 cm)

Note: Size does not include mating connectors and optics.


 14oz  (.4 Kg)


 Operating: 0-30C non-condensing


 -10-50C non-condensing


 Supplied through IEEE 1394 interface

 10-24 V DC Conforming to IEEE 1394 specification

 Nominal 5 watts, Max 7 Watts on read-down

Hardware Trigger input

 Input for trigger: 2-Pin Lemo Connector

Trigger on Low transition (TTL logic level)

Integration completes on return to high

Strobe Trigger output

 PC connector, Nikon type with screw threads


 Single Green/Red LED


 Enabled and ready to capture


 Busy---not ready to capture


 66 dB at base gain

Live Focus

 Supported at all binning modes


 1X, 2X, 4X


  Monochrome or RGB Bayer pattern

User controls

 Power switch only. All controls through software


 Software controlled preamp with 4X range

Read down time

 .7 seconds (includes transfer to host computer)

Bits per color(mono)/total

 ADC: 14/46   Mapped:12/36   File: 16/48

File Sizes

       RAW (.DNG)

Monochrome/Bayer:  22 megabytes (uncompressed, unpacked)

Color Wheel:              66 megabytes            

Monochrome/Bayer:  <10 megabytes, (typical, lossless compression)

       TIFF (Uncompressed)

11 megabytes mono  / 33 megabytes color at 8 bits/color

22 megabytes mono / 66 megabytes color at 16 bits/color


< 4 megabytes Mono / < 15 megabytes color visually lossless compression

Host Cameras

 Most Technical and mechanical medium format camera bodies


 IEEE 1394, 400 Mbit/second (FireWire)

Host computer requirements

Operating System

 Windows Vista, XP, or  2K :  Professional  recommended


Recommended minimum: 800 X 480 for location, 1280X1024 for studio


Recommended minimum 1 GHz P4 for location, 2GHz P4 for studio


Recommended minimum: 1 Gigabytes for location, 2 Gigabytes for studio

Disk Drive

8 Gigabyte unused