AXIS CERTIFICATION EXAM – COMPLETE STUDY GUIDE
Questions with Verified Answers & Explanations
SECTION 1: SYSTEM DESIGN
Question 1: What is WDR (Wide Dynamic Range) and when should it be used?
Answer: WDR is used when there are large differences in lighting in different parts of a scene
(e.g., a doorway with bright sunlight outside and a dark interior). WDR mode combines short
exposure for lighter parts and long exposure for darker parts of a scene .
Question 2: What is Lightfinder Technology?
Answer: Lightfinder Technology provides extreme light sensitivity, allowing cameras to produce
color images in very low light conditions .
Question 3: What is Zipstream and why is it important?
Answer: Zipstream is Axis's proprietary method of optimizing compression in H.264 and H.265
to decrease bandwidth usage without sacrificing forensic image quality or dropping frames. It
maintains details in regions of interest while compressing other regions more .
Question 4: What is OptimizedIR?
Answer: OptimizedIR provides even IR lighting that automatically adapts to the camera's zoom
level, ensuring uniform illumination across the scene regardless of zoom position .
Question 5: What is the Corridor Format?
Answer: Corridor Format rotates the camera 90 degrees to provide a 9:16 aspect ratio, which is
ideal for vertical scenes such as hallways, stairwells, and long corridors .
, Question 6: What is Electronic Image Stabilization (EIS)?
Answer: EIS stabilizes images in vibration-prone locations by using a gyroscope and algorithms
to compensate for camera movement digitally (without changing lens settings) .
Question 7: What must a camera meet to comply with the HDTV standard (SMPTE)?
Answer: A camera must meet: HD Resolution (720P or 1080P), 25/30 FPS, 16:9 aspect ratio,
and proper color fidelity .
Question 8: What is the difference between fixed, varifocal, and zoom lenses?
Answer: Fixed lens: fixed focal length; cannot zoom. Varifocal lens: adjustable focal length but
must be manually refocused after change. Zoom lens: adjustable focal length with maintained
focus (parfocal) .
Question 9: What is the Pixel Counter?
Answer: A visual aid in Axis Camera Station that shows a frame with a counter of width/height
pixels to ensure that resolution is sufficient for the intended purpose (e.g., identification) .
Question 10: What is Depth of Field, and what controls it?
Answer: Depth of Field is the area that is sharp stretching behind and in front of a lens focus
point. It is controlled by f-number (aperture), focal length, and distance to the subject .
Question 11: What is vignetting and what causes it?
Answer: Vignetting is darkening of image corners caused when the lens format is smaller than
the sensor format, so the sensor "sees" the edges of the lens barrel .
Questions with Verified Answers & Explanations
SECTION 1: SYSTEM DESIGN
Question 1: What is WDR (Wide Dynamic Range) and when should it be used?
Answer: WDR is used when there are large differences in lighting in different parts of a scene
(e.g., a doorway with bright sunlight outside and a dark interior). WDR mode combines short
exposure for lighter parts and long exposure for darker parts of a scene .
Question 2: What is Lightfinder Technology?
Answer: Lightfinder Technology provides extreme light sensitivity, allowing cameras to produce
color images in very low light conditions .
Question 3: What is Zipstream and why is it important?
Answer: Zipstream is Axis's proprietary method of optimizing compression in H.264 and H.265
to decrease bandwidth usage without sacrificing forensic image quality or dropping frames. It
maintains details in regions of interest while compressing other regions more .
Question 4: What is OptimizedIR?
Answer: OptimizedIR provides even IR lighting that automatically adapts to the camera's zoom
level, ensuring uniform illumination across the scene regardless of zoom position .
Question 5: What is the Corridor Format?
Answer: Corridor Format rotates the camera 90 degrees to provide a 9:16 aspect ratio, which is
ideal for vertical scenes such as hallways, stairwells, and long corridors .
, Question 6: What is Electronic Image Stabilization (EIS)?
Answer: EIS stabilizes images in vibration-prone locations by using a gyroscope and algorithms
to compensate for camera movement digitally (without changing lens settings) .
Question 7: What must a camera meet to comply with the HDTV standard (SMPTE)?
Answer: A camera must meet: HD Resolution (720P or 1080P), 25/30 FPS, 16:9 aspect ratio,
and proper color fidelity .
Question 8: What is the difference between fixed, varifocal, and zoom lenses?
Answer: Fixed lens: fixed focal length; cannot zoom. Varifocal lens: adjustable focal length but
must be manually refocused after change. Zoom lens: adjustable focal length with maintained
focus (parfocal) .
Question 9: What is the Pixel Counter?
Answer: A visual aid in Axis Camera Station that shows a frame with a counter of width/height
pixels to ensure that resolution is sufficient for the intended purpose (e.g., identification) .
Question 10: What is Depth of Field, and what controls it?
Answer: Depth of Field is the area that is sharp stretching behind and in front of a lens focus
point. It is controlled by f-number (aperture), focal length, and distance to the subject .
Question 11: What is vignetting and what causes it?
Answer: Vignetting is darkening of image corners caused when the lens format is smaller than
the sensor format, so the sensor "sees" the edges of the lens barrel .
