APS camera crop factor
If you’re shooting with an APS-C (crop-sensor) camera, and most photographers are, this quick conversion guide will help you understand how lens focal lengths translate on your camera.
The chart shows you the effective focal length of any lens once it’s mounted on a crop-sensor body.
For example:
- A 50mm lens behaves like an 80mm on a Canon APS-C camera.
- A 600mm lens becomes the equivalent of 960mm on a Canon APS-C body.
Most of the time you won’t need to think about the exact converted millimetres, but when you do, whether you’re comparing lenses or planning a jump to full-frame, the guide below makes it easy to figure out what focal length you’re actually working with.
Sample cameras
Here are representative current or recent models for each brand, grouped by sensor type.
Current list as compiled by ChatGPT –
| Brand | APS-C / Crop Models (Current-ish) | Full-Frame (or Larger) Models (Current-ish) |
|---|---|---|
| Canon | – EOS R7 — 32 MP APS-C. – EOS R10 — 24 MP APS-C. – EOS R50 — 24.2 MP APS-C. – EOS R50 V — video-optimized version, APS-C. | – EOS R6 Mark III — full-frame mirrorless. – EOS R8 — full-frame. (Part of R-series) – EOS R5 / R5 II — high-resolution full-frame pro mirrorless. – EOS C50 — full-frame Cinema EOS. |
| Nikon | – Z50 II — Nikon’s APS-C (DX) mirrorless “entry / enthusiast” body. – (Note: Nikon does not have as many new DX bodies; most recent is Z50 II.) | – Z5 II — full-frame (FX) mirrorless, announced in 2025. – Z6 / Z6 III — full-frame mirrorless. (Very common “mid-pro” pick) – Z7 / Z8 / Z9 — higher-end full-frame mirrorless. |
| Sony | – α6700 (A6700) — 26 MP APS-C. – Other a6000-series (A6100, A6400, etc.) remain relevant. | – α7 IV — full-frame mirrorless (very popular). – α7R V — full-frame, high-resolution. – α1 / α9 — ultra high-end pro full-frame. |
| Pentax | – Pentax KF — This is one of the last new APS-C DSLRs. | – Pentax K-1 / K-1 II — Full-frame DSLRs from Pentax. (These are their main “full-frame” DSLR bodies.) |
| Fujifilm | – Virtually all of its X-series mirrorless models are APS-C: e.g., X-T5, X-H2 (if crop version), X-S10, X-E5, etc. | – GFX series — Medium Format sensors, larger than full-frame (e.g., GFX 100, GFX 100 II, GFX 50S) |
Some of the more popular older camera models:
Canon Rebel line, Canon 10D, 20D, 40D, 50D, 60D, 70D, 80D, 90D Canon 7D, 7D mk II with the 1.6 crop factor
Nikon D7200, Nikon D500, Pentax K3 and the Sony Sony A77 with 1.52 (I used 1.52 – there are some versions 1.53 or 1.54 but it gets to confusing to add all these)
(there are more brands and models but this is a sample)
If you want a printable copy of the Crop Factor page click here https://www.firstchoicephoto.ca/CropPage.jpg
