Kowa VX-10a, Instruction Manual, Page: 38 / 64

Other pr
actical photog
ra
phy
4
P4-1
4-1 Photography of enlarged image
This paragraph describes the method of photographing enlarged image. On this
equipment, you can select from the field angles of 50° and 30° in mydriatic color and
mydriatic fluorescein modes, and from those of 45° and 27° in non-mydriatic mode.
1) Operate according to the paragraphs of “3. Basic photography.”
2) In each mode of photography, operate from positioning to focussing of
the examined eye at the field angle of 50°(45°).
3) Select a desired field angle by the field angle knob. If video camera
connecting adapter is in use, be sure to switch the field angle knob of
the video camera adapter.
4) Perform fine adjustment of focussing and alignment, and then press
the shutter button to photograph.
n
Photography of enlarged image
• Photograph is taken by enlarging the central part at the field angle of 30° (27°) against those of 50° (45°).
• In photographing enlarged image, guide the patient's gaze point such that the part to be photographed can
come in the center of the field angle of 50° (45°).
• When luminous lines for focusing detection is
in use, adjust the focusing at the field angle of
50° (45°). You need not adjust focussing after
changing the field angle.
• When video camera connecting adapter is in use, be sure to switch the field angle knob at the same time as
well.
• When the field angles of main camera unit and video adapter do not agree, pressing the shutter button
causes an alarm to sound and permits no image to be captured.
• It takes about 3 seconds to switch to Small pupil mode.
Since photographing immediately after switching the mode does not allow you to capture a good image, wait
at least three seconds before starting photography.
4-2 Small pupil photography
This paragraph describes a small pupil photography method in mydriatic “Color” and
“FA” mode. If pupil size is 4.0 mm or more in diameter, photography is enabled in
Small pupil mode.
1) Operate according to the paragraphs of “3-3 Mydriatic color
photography” and “3-4 Mydriatic fluorescein angiography.”
2) Press S.P. button on the right-hand panel. For timing of pressing the S.P
button, see "POINTS" mentioned below.
3) Adjust the focus and alignment and then press the shutter button to
photograph.
FA Color
Blue
Eye
4) Switching field angle
2) S.P. button