Image Acquisition & Capture Flashcards
7 cards from real DIS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Image Acquisition & Capture flashcards as text
A photographer wants to reduce the effect of camera shake without using a tripod. Which in-camera feature most directly addresses this?
Answer: In-body image stabilization (IBIS)
IBIS shifts the camera sensor to counteract physical movement, reducing blur from hand-held shooting at slower shutter speeds.
In digital capture, 'analog gain' is applied:
Answer: Before the analog-to-digital conversion, at the sensor readout stage
Analog gain amplifies the electrical signal from the photosites before the ADC converts it to digital values, which is more efficient than amplifying digitally.
The 'angle of view' of a lens changes when the same focal length is used on sensors of different sizes primarily because:
Answer: A smaller sensor captures only the central portion of the image circle the lens projects
A crop sensor uses only the center of the lens's projected image circle, reducing the captured field of view compared to a full-frame sensor with the same focal length.
When capturing tethered images directly to a computer, which workflow benefit is most significant for product photography studios?
Answer: Photographers and clients can review large images immediately on a calibrated monitor
Tethered capture allows immediate, large-screen review of critical details like focus, exposure, and styling on a calibrated display rather than the small camera LCD.
What is the main purpose of a 'pre-flash' emitted by a dedicated TTL flash unit?
Answer: To measure scene reflectivity and calculate the required main flash output
The pre-flash fires before the shutter opens; the camera's metering system analyzes the reflected light to calculate the correct main flash power for proper exposure.
A digital camera's 'native ISO' refers to:
Answer: The ISO setting at which the sensor achieves its optimal signal-to-noise ratio without electronic amplification
Native ISO is the base sensitivity where the analog-to-digital converter and sensor work at their design optimum, yielding the best dynamic range and lowest noise.
Which shutter type uses the sensor itself to control exposure timing without any mechanical moving parts?
Answer: Electronic shutter
An electronic shutter starts and stops sensor readout electronically, eliminating shutter sound and vibration but potentially causing rolling shutter artifacts with fast motion.