Sources
Image credits
Most site photography is original, generated for Aperture Authority, supplied by a manufacturer, or rendered from public product imagery. Third-party editorial and official-source images are credited here.
The homepage field-lesson images were generated for Aperture Authority with an OpenAI image model, then art-directed and reviewed for composition, equipment continuity, and technique accuracy.
Editorial images
Third-party image credits
These images were resized or converted for web delivery.
- Crop Factor Explained
Two Canon DSLR cameras side by side by Quilia. Licensed under Unsplash License. The image was resized and converted to JPEG for web delivery.
- Crop Factor Explained
Canon Camera Sensor Sizes v2 by Commander Keane. Licensed under CC BY-SA 4.0. The image was resized and converted to JPEG for web delivery.
- Focal Length Explained
Three assorted black camera lenses by Denisse Leon. Licensed under Unsplash License. The image was resized and converted to JPEG for web delivery.
- IBIS Explained
Olympus OM-D E-M1 image stabilization unit by 456 Photo. Licensed under CC BY 2.0. The image was resized and converted to JPEG for web delivery.
- Mirrorless vs DSLR
Person holding black Sony camera by Michael Soledad. Licensed under Unsplash License. The image was resized and converted to JPEG for web delivery.
- Photography Rules by State
Man standing while holding black tripod by Jerry Zhang. Licensed under Unsplash License. The image was resized and converted to JPEG for web delivery.
Product references
Official product images
Manufacturer and authorized retail images are used to show the current product accurately. The Luna Ultra versus Pocket 4 article hero is an OpenAI-assisted studio composite made from those official product references.
- Insta360 Luna Ultra
Official product imagery from Insta360, resized and converted for web delivery on Insta360 Luna Ultra vs DJI Osmo Pocket 4.
- Insta360 Mic Air
Official product imagery from Insta360, resized and converted for web delivery on Best Microphones for Video.
- DJI Osmo Pocket 4
Official product imagery from DJI India Shop, resized and converted for web delivery on Insta360 Luna Ultra vs DJI Osmo Pocket 4.
Rules heroes
National Park Service source images
NPS images are public domain unless otherwise noted, but we still credit the source image on each park page.
- Acadia National Park
Hero photo by NPS / Kristi Rugg.
Source description: A brilliant sunset filled with hues of blue, red, orange, magenta, and purple highlight the sky.
- Arches National Park
Hero photo by NPS/Veronica Verdin.
Source description: A crowd of people sit and watch the sunset at delicate arch.
- Bryce Canyon National Park
Hero photo by NPS Photo / Peter Densmore.
Source description: A red rock landscape and plateau forest glows with the morning sun
- Death Valley National Park
Hero photo by NPS.
Source description: Snowcapped mountains surrounded by bright blue skies and frames by gold wildflowers on a valley floo
- Glacier National Park
Hero photo by NPS Photo.
Source description: Large mountains dotted with snow loom above a rocky meadow filled with yellow flowers.
- Grand Canyon National Park
Hero photo by NPS/M.Quinn.
Source description: The canyon glows orange as people visit Mather Point, a rock outcropping that juts into Grand Canyon
- Grand Teton National Park
Hero photo by NPS Photo / D. Lehle.
Source description: Backpackers in North Fork Cascade Canyon, Grand Teton behind
- Great Smoky Mountains National Park
Hero photo by NPS / Bob Carr.
- Joshua Tree National Park
Hero photo by NPS / Emily Hassell.
Source description: The sky turns hues of pink and purple over a field of Joshua trees.
- Mount Rainier National Park
Hero photo by NPS Photo / Emily Brouwer.
- Olympic National Park
Hero photo by NPS Photo/Jon Preston.
Source description: A herd of elk crossing a river.
- Rocky Mountain National Park
Hero photo by NPS Photo.
Source description: A person is using hiking poles and traction devices and hiking in snow
- Sequoia and Kings Canyon National Parks
Hero photo by NPS/Rick Cain.
Source description: A deep canyon with a forested floor and steep granite cliffs
- Yellowstone National Park
Hero photo by NPS/Jim Peaco.
Source description: Brilliant blues and greens of a hot spring ringed by oranges, yellows, reds, and browns.
- Yosemite National Park
Hero photo by NPS / Cindy Jacoby.
Source description: Two tall waterfalls flowing down snow covered granite walls.
- Zion National Park
Hero photo by NPS/Shane Carte.
Source description: A triangular sandstone mountain overlooks green and yellow foliage. A cloudy blue sky is overhead.