Focal length
Also known as prime lens, zoom lens. Category: Lighting and optics
Focal length, given in millimetres, determines a lens's angle of view and magnification: short focal lengths are wide, long ones narrow. Prime lenses have one fixed focal length, while zoom lenses cover a range.
How PhotoRobot uses it
PhotoRobot's recommended cameras guide matches lens types to work: zoom lenses for universal robotic arm or tripod use, macro lenses for detail work, and prime lenses with a fixed focal length for multi-camera synchronisation. Its blog notes that most larger products need only a zoom lens of around 40 to 100 mm to keep the product in frame.
See on photorobot.com
Related terms
- Macro photography: Photographing small subjects at close range so that they appear life-size or larger on the sensor.
- Depth of field: The distance range in front of and behind the focus point that appears acceptably sharp.
- Crop factor: The ratio between full frame and a smaller sensor, used to compare fields of view.
- Aperture: The adjustable lens opening, given as an f-number; smaller openings give more depth of field.
Where this term appears on photorobot.com
Mentioned on 16 pages of photorobot.com:
- Recommended Cameras for PhotoRobot Systems (Manual)
Zoom lens (Universal, robotic arm / tripod use) Macro lens (Macro / detail, close-up photography) Prime lens (Fixed focal, multi-camera synchronization) Zoom Lens (Universal, Robotic Arm / Tripod). - Jewelry Photography - Behind the Scenes Production (Blog)
Using a macro lens with a fixed focal length is essential for jewelry photos. - Studio Lighting Overview for PhotoRobot Systems (Manual)
…focus limits, total depth of field, and the hyperfocal distance for any combination of focal length, aperture, sensor format, and subject distance. - Understanding Camera Resolution for PhotoRobot Customers (Manual)
There was a zoom lens covering 24mm to 105mm in use, with image capture at 77mm at F16 and speed 1/125. - 360° Product Photography - Content Formats and Production (Blog)
Usually, a zoom lens with 40 - 100mm focal length accomplishes this. - 3D eCommerce - What is it, Why it Matters, and Production (Blog)
Often, a zoom lens with 40 - 100mm focal length achieves this. - Depth of Field Chart for Studio Photography (Page)
Do you need to know if a 35 cm handbag remains fully sharp at f/16? Adjust the sensor, focal length, and unit above the table to recompute every cell. - What is Automated Image Capture? (Glossary)
It pushes instructions regarding focal length, aperture, ISO, and shutter speed. - What is Automated Product Imaging? (Glossary)
The automation software ensures that physical inputs—lighting, camera elevation, and focal length—are strictly controlled. - Depth of Field Calculator for Studio Photography (Page)
…focus limits, total depth of field, and the hyperfocal distance for any combination of focal length, aperture, sensor format, and subject distance. - DSLR vs Mirrorless Cameras in 2020: Comparison and Review (Blog)
Always popular with photographers, these cameras support telephoto, wide angle, and prime lenses for portraits and low-lights, and, while heavier than mirrorless cameras, they come with long-lasting… - eCommerce Photography - How to Optimize Production (Blog)
Take into account and document all camera settings, such as: Shutter speed Aperture ISO White balance Focal length Any unique settings that might change from one shot to the next Also be sure to… - Effective Equipment for 360 Spin Photography (Blog)
For this purpose, consider a standard zoom lens to cover a wider range of product sizes. - Guide to 360 Product Photography for E-Commerce (Blog)
This camera provides high quality photos with deep zoom capacity, and its zoom lens at 24-105 is perfect for making quick adjustments in the studio based on the photographed object’s size. - Mastering Product Photography: Shoes and Footwear (Blog)
Its zoom lens at 24-105 is also perfect for making quick adjustments in the studio based on the size, shape, and overall design of the shoes and footwear. - Packshot Photography - What is it, and How to Produce It (Blog)
Typically, we suggest a focal length of at least 50mm, although higher is better.