viewfinder
US /ˈvjuːˌfaɪn.dɚ/
UK /ˈvjuːˌfaɪn.dɚ/

1.
viseur
a device on a camera showing the field of view of the lens, used in framing and focusing the picture.
:
•
She looked through the viewfinder to compose her shot.
Elle a regardé à travers le viseur pour composer sa photo.
•
The old camera had a bright, clear viewfinder.
L'ancien appareil photo avait un viseur lumineux et clair.