What is the hyperfocal distance at 18mm f/8 on APS-C?
At 18mm, f/8, on APS-C (the 1.5x-labeled Nikon/Sony/Fujifilm format, whose real computed crop factor is 1.53x), the hyperfocal distance is roughly 2.17 meters (7.1 feet). Focus there and everything from about 1.09 meters to infinity reads as acceptably sharp.
Why This Is a Common Kit-Zoom Reference Point
18mm sits at the wide end of the near-universal 18-55mm APS-C kit zoom, and f/8 is a common moderate landscape aperture — this specific combination is exactly what a beginner shooting their first landscape with a kit lens is likely to be using. Because APS-C's smaller sensor uses a stricter circle of confusion (0.0188mm against full frame's 0.0288mm), the hyperfocal distance here is meaningfully shorter than the same 18mm f/8 would produce on full frame, even before accounting for field-of-view differences.
What Changes This Number
Stopping down to f/11 shortens it to roughly 1.58 meters. This figure is specific to the 1.5x-labeled APS-C format shared by Nikon, Sony and Fujifilm — Canon's slightly smaller APS-C sensor (1.61x computed) produces a somewhat shorter hyperfocal distance at the identical 18mm f/8, since its stricter circle of confusion pulls the number down further.
Check the exact figure for your camera and settings in the DoF & Hyperfocal Calculator, pre-filled with 18mm f/8 on APS-C.
Frequently Asked Questions
Does Canon's APS-C give a different hyperfocal distance than Nikon or Sony's at 18mm f/8?
Yes, slightly — Canon's APS-C sensor is a little smaller (1.61x computed crop factor against 1.53x for Nikon/Sony/Fujifilm), giving it a stricter circle of confusion and a shorter hyperfocal distance at the identical real focal length and aperture.
How does this compare to shooting the same 18mm f/8 on full frame?
Full frame's larger circle of confusion alone would produce a longer hyperfocal distance at the identical 18mm f/8, though in practice photographers rarely compare the same real focal length across formats since the field of view is completely different — an 18mm lens frames far wider on full frame than on APS-C.