# Aperture > The adjustable lens opening, given as an f-number; smaller openings give more depth of field. Also known as: f-stop, f-number. Category: Lighting and optics. The aperture is the adjustable opening in a lens that controls how much light passes through, expressed as an f-number (f/4, f/8, f/16). A higher f-number means a smaller opening, less light and a greater depth of field. ## How PhotoRobot uses it PhotoRobot notes that greater depth of field requires a higher f-number, which in turn demands more light intensity; this is one reason it recommends strobes for larger products. PhotoRobot Controls sets aperture remotely on supported Canon cameras. ## See on photorobot.com - [Depth of field calculator](https://www.photorobot.com/depth-of-field-calculator) ## Related terms - [Depth of field](https://www.photorobot.com/glossary/depth-of-field): The distance range in front of and behind the focus point that appears acceptably sharp. - [Exposure](https://www.photorobot.com/glossary/exposure): The amount of light that reaches the sensor, set by aperture, shutter speed, ISO and light output. - [Hyperfocal distance](https://www.photorobot.com/glossary/hyperfocal-distance): The focus distance that gives the maximum depth of field, extending sharpness to infinity. - [Focal length](https://www.photorobot.com/glossary/focal-length): The lens property, in millimetres, that sets the angle of view and magnification. ## Where this term appears on photorobot.com Mentioned on 19 pages. Most relevant: - [Recommended Cameras for PhotoRobot Systems](https://www.photorobot.com/manuals/recommended-cameras): Therefore, it is possible to set the time, aperture, ISO sensitivity and other settings while monitoring the scene through live-view. - [Broncolor Siros 800 S WiFi / RFS 2 Operating Instructions](https://www.photorobot.com/manuals/broncolor-siros-800-s-operating-instructions): Meanwhile, turning the controller slowly changes it in 1/10 f-stop steps, and turning fast (“twisting”) in 1/1 f-stop steps. - [FOMEI Digital Pro X Studio Flash - PhotoRobot User Guide](https://www.photorobot.com/manuals/fomei-digital-pro-x): How to Input Correct Exposure Value The user should input the correct exposure value into the Digital Pro X when its Power Intensity (F-stop) is F1.1. - [Studio Lighting Overview for PhotoRobot Systems](https://www.photorobot.com/manuals/studio-lighting-overview): …total depth of field, and the hyperfocal distance for any combination of focal length, aperture, sensor format, and subject distance. - [Jewelry Photography - Behind the Scenes Production](https://www.photorobot.com/blog/jewelry-photography): The lens should have a large aperture (F2.8), and a 1:1 ratio to photograph products at their actual size. - [PhotoRobot CASE 850 Portable Studio User Guide](https://www.photorobot.com/manuals/case-850-user-guide): …your lens – detect your lenses’ optimal performance; you are looking for the highest aperture value with acceptable sharpness and contrast transmission – most lenses drop image quality at about f/16. - [Understanding Camera Resolution for PhotoRobot Customers](https://www.photorobot.com/manuals/camera-resolution): …total depth of field, and the hyperfocal distance for any combination of focal length, aperture, sensor format, and subject distance. - [Depth of Field Chart for Studio Photography](https://www.photorobot.com/depth-of-field-chart): The Depth of Field chart shows total depth of field for common subject distances and apertures, with the smaller numbers in each cell giving the precise near–far focus range. - [Depth of Field Calculator for Studio Photography](https://www.photorobot.com/depth-of-field-calculator): …total depth of field, and the hyperfocal distance for any combination of focal length, aperture, sensor format, and subject distance. - [Guide to Attaining the Perfect Lighting for 360 Product Photography](https://www.photorobot.com/blog/guide-to-attaining-the-perfect-lighting-for-360-product-photography): The high intensity of the strobe lights makes it possible to use higher aperture and reach this depth of field, while also playing a crucial role in shooting larger products.