Product Photography Lens Selection for Products 4 — Questions and Answers
Question 1: A photographer is building a one-lens kit specifically for e-commerce product photography. Which single focal length is most versatile?
- 14mm ultra-wide
- 50mm macro prime (Correct answer)
- 300mm telephoto
- 8mm fisheye
Correct answer: 50mm macro prime
A 50mm macro prime delivers natural perspective, close focusing capability, and sharpness needed for most e-commerce product sizes.
Question 2: When is a zoom lens preferred over a prime lens in a product photography studio setting?
- When maximum image sharpness is the only priority
- When quickly varying the framing of many different product sizes saves time (Correct answer)
- When shooting at very high magnification
- When using a very long telephoto reach
Correct answer: When quickly varying the framing of many different product sizes saves time
Zoom lenses offer flexible framing without physically moving the camera, which is efficient when shooting many differently-sized products.
Question 3: What is the 'reproduction ratio' of a lens, and what ratio does a true macro lens achieve?
- The optical magnification on screen; true macro achieves 10:1
- The size of the subject on the sensor vs real life; true macro achieves 1:1 (Correct answer)
- The zoom range; true macro achieves 5:1
- The bokeh quality; true macro achieves 0.5:1
Correct answer: The size of the subject on the sensor vs real life; true macro achieves 1:1
Reproduction ratio describes how the real subject size maps to sensor size; 1:1 means the subject is rendered life-size on the sensor.
Question 4: A studio photographer notices soft corners in product flat lay images. What is the most likely cause?
- The aperture is too small
- The lens is being used at its maximum aperture where corner sharpness is weakest (Correct answer)
- The shutter speed is too fast
- The ISO is too high
Correct answer: The lens is being used at its maximum aperture where corner sharpness is weakest
Most lenses exhibit soft corners wide open; stopping down 2–3 stops typically improves corner sharpness significantly.
Question 5: For photographing a product through a glass surface (like a display case), which filter helps reduce reflections and increase color saturation?
- ND (neutral density) filter
- UV filter
- Circular polarizing filter (CPL) (Correct answer)
- Star filter
Correct answer: Circular polarizing filter (CPL)
A circular polarizing filter blocks polarized light reflections from glass surfaces, allowing the product inside to be photographed more clearly.
Question 6: Why might a product photographer choose a lens with optical image stabilization (OIS) even when shooting on a tripod?
- OIS improves macro magnification ratios
- OIS can reduce mirror vibration effects on shorter exposures (Correct answer)
- OIS is needed to achieve correct exposure
- OIS helps correct chromatic aberration
Correct answer: OIS can reduce mirror vibration effects on shorter exposures
Some OIS systems help dampen minor vibrations from mirror slap or studio floor movement even on a tripod, though many photographers disable OIS on a tripod.
Question 7: A photographer using a full-frame camera switches to an APS-C crop sensor camera with the same 100mm lens. How does this affect product framing?
- The field of view becomes wider
- The effective focal length increases (by ~1.5x), so the product appears larger in frame (Correct answer)
- The reproduction ratio decreases
- No change occurs to framing
Correct answer: The effective focal length increases (by ~1.5x), so the product appears larger in frame
A 1.5x crop factor makes the 100mm lens behave like a 150mm, tightening the framing and making the product appear larger.
Product Photography Lens Selection for Products 4
A photographer is building a one-lens kit specifically for e-commerce product photography.
Which single focal length is most versatile?