When your focus is sharp at full zoom but soft when zoomed out, your back focus needs adjusting! The Back Focus Test Card, ‘Siemens Star’ will help you calibrate your equipment back to sharpness at full zoom and wide angle.
When your focus is sharp at full zoom but soft when zoomed out, your back focus needs adjusting! The Back Focus Test Card, ‘Siemens Star’ will help you calibrate your equipment back to sharpness at full zoom and wide angle.
