Ultra Wide-Angle Lenses: Crop vs Full Frame Focal Lengths

Ultra Wide-Angle Lenses: different focal lengths (comparing Crop and Full Frame focal lengths)

On my website I have made two posts from the same Woodbridge Island, Cape Town location for interested photographers looking at wide-angle lenses.

Please note: These posts are not about image quality comparisons, but rather focal length framing when using an APS-C / crop sensor camera and a full frame camera with more / less the same focal lengths. 

Shooting Location
Crop and full frame images captured on two different days.

Canon EF-S vs. EF Lens Compatibility

Canon EF-S lenses are not compatible with Canon Full Frame bodies and will only fit / work on Canon APS-C / crop sensor bodies (the little white dot on body and white square on lens). EF lenses are compatible will both Canon APS-C / Full Frame bodies (the little red dot on body and lens - crop bodies will have a red and a white dot to show compatibility with both EF and EF-S lenses).

Image 1: 10mm: From the Canon EF-S 10-18mm f4.5 - 5.6 IS STM Lens on a crop sensor camera (EOS 700D). Following the link to see 10mm / 14mm / 18mm
.
Canon EF-S 10-18mm f4.5 - 5.6 IS STM Lens Samples

Image 2: 16mm: From the Canon EF 16-35mm f/4L IS USM Lens on a full frame camera (EOS 6D). Following the link to see 16mm / 20mm / 23mm / 28mm / 35mm

Canon EF 16-35mm f/4L IS USM Lens Samples

(Click to enlarge)

Image 1: Canon EOS 700D / Canon EF-S 10-18mm IS STM Lens  @ 10mm 

Canon EOS 6D / EF 16-35mm f/4L IS USM Ultra-Wide Lens @ 16mm