BX 900

Superior technology – reliable instrument

The Haag-Streit BX 900 slit lamp combines the latest imaging technology with the proven versatility, optical brilliance and mechanical quality of the Haag-Streit tradition.


The photographer’s slit lamp

The BX 900 is THE leading slit lamp imaging device. It comes equipped with LED slit illumination which offers an extremely sharp and homogenous slit, providing clinicians with diagnostic confidence.  An integrated flash and camera are mounted above the microscope to allow ease of access to the patient. This is especially useful when photographing in conjunction with hand-held diagnostic lenses.

Xenon flash

The high power flash illumination is delivered via a xenon tube that lies coaxially to the LED illumination and thus exactly reproduces the slit illumination pattern to provide images of stunning quality. The brightness of the flash is individually adjustable for slit and background illumination.

Mirror Housing

The heart of the BX 900 is the mirror housing with its built-in diaphragms. When capturing an image, all light is directed via a mirror to the camera. This allows the maximum utilisation of the available light: 100% for the examination and 100% for the image. The built-in diaphragm setting with five apertures is applied automatically on image capture.

Shutter release

Conveniently mounted close to the operator’s hand, this can easily be utilised whilst continuously maintaining focus with the slit lamp joystick. As it is symmetric on the cross slide, it allows right- and left-handed operation.


Light-source: LED (slit and background illumination)
Slit width: 0 – 8 mm continuous
Slit length: 1 – 8 mm continuous and fixed apertures
Illumination field diameter: ø 8/5/3/2/1/0.2mm, Test mark with fixation star
Slit image rotatability: ± 90°
Swiveling of the slit illumination to the microscope axis: Horizontal ± 90°, vertical 0 – 20°
Filters: Blue, red-free (green), grey (10%)


Stereo angle: 13°
Overall magnification: 6.3 x, 10 x, 16 x, 25 x and 40x
Ocular magnification: 12.5 x
Range of adjusting eye-pieces: +7 to -7 diopters
Inter pupillary distance: 52 – 78 mm
Filter: Optional contrast enhancing filter


Camera: SLR camera connector
Image capture: via synchronized mirror housing
Apertures: 5 mechanical apertures
Flash illumination: Xenon flash (slit and background)

Instrument base

Operation: Single handed 3-dimensional operation of the control lever
Spatial adjustment of the instrument base: 100mm (length), 100mm (side), 30mm (height)

Power supply

Haag-Streit: PS LED 100 – 240 V mains voltage, 50 – 60 Hz operating frequency

Working temperature

10° to 35° C

Measures (W x L x H)

312 mm x 305 mm x 700 mm

Net weight

14.8 kg (without power supply, head rest and options)