Canon RF-S 7.8mm F4 STM Dual
Lens for Canon RF · Announced October 2024
Official site on usa.canon.com (opens the maker's site in a new tab)
- APS-C lens
- Ultra-wide
Typically $409 new, from today's stores and the last 90 days
Best priceNew · in stock
$409
at Focus Camera
- Launch RRP
- $449.99Best new is 9% under
- Focal length: 7.8mm, 12mm equivalent
- Max aperture: f/4
- Optical stabilisation: None
- Autofocus motor: STM
- Weight: 131 g
- Weather sealing: No
- Max magnification: 0.07×, Focuses to 0.15 m
RF-S 7.8mm F4 STM Dual overview
The Canon RF-S 7.8mm F4 STM Dual is a 7.8mm f/4 prime for APS-C cameras on Canon RF, announced by Canon in October 2024. 7 cameras we track take it without an adapter.
Going by its spec sheet, it suits landscapes and interiors as well as travel. It is a weaker pick for rain and dust, low light without a tripod, and close-ups.
New, it sells for $409 to $409.99 at the 3 stores we track in the United States that have it in stock. It launched at $449.99.
Worth comparing it with the Laowa 9mm f/2.8 Zero-D.
Where to buy the RF-S 7.8mm F4 STM Dual in United States
eBay.comAd
New and used, from single sellers: check condition and returns
Search eBay at eBay.comPaid link
Amazon.comAd
Also check on Amazon: new, sold by Amazon and its sellers, the price shows there
Check Amazon at Amazon.comPaid link
Focus CameraBest price
NewIn stock
Authorized dealer · Canon RF version
$409
19% off
$509Precision Camera
NewIn stock
Authorized dealer · Canon RF version
$409.99
Glazer's Camera
NewIn stock
Authorized dealer · Canon RF version
$409.99
19% off
$509.99Abt
NewOut of stock
Authorized dealer · Canon RF version
$409
Camera West
NewOut of stock
Authorized dealer · Canon RF version
Above RRP +13%
$509.99
More used Canon RF-S 7.8mm F4 STM Dual on eBayPaid linkSingle sellers, auctions included: check the listing's condition and returns.
Sorted by price, body only first, cheapest in stock first. Kits are listed apart and never counted as the body price. Some links earn us a commission. The Amazon and eBay rows above are ads; the store rows keep their price order.
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Expert reviews
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Member stories · RF-S 7.8mm F4 STM Dual
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Things to know
- 7.8mm prime, f/4; 12mm equivalent.
- APS-C lens: on a full-frame body of the same mount it crops the frame.
- Autofocus (STM motor); no optical stabilisation.
- 131 g; 69.2 × 41.5 mm; 58mm filters.
- Focuses down to 0.15 m, up to 0.07× magnification.
- Not weather sealed.
- No used body-only listings at the stores we track in United States today: check eBay and the Used filter.
Good for
- Landscapes and interiors (12mm-equivalent wide end)
- Travel (131 g)
Not the best for
- Rain and dust (not weather sealed)
- Low light without a tripod (f/4 at its widest)
- Close-ups (0.07× magnification)
From the RF-S 7.8mm F4 STM Dual's published specs, not from a review.
Price history
Price around the world
Cheapest right here in the US: about 10% under the price in Australia, the next cheapest.
Prices are in each market's own currency. Under each: ≈ in USD at today's exchange rate. Body only; where a market lists only kits, its cheapest kit is shown and marked.
| Market | Lowest new | Lowest used/refurb |
|---|---|---|
| United States(you)Cheapest | $409 | — |
| United Kingdom | £499≈ $668 | — |
| Europe | — | — |
| Australia | A$658.22≈ $452 | — |
| Singapore | — | — |
Each price is in its own currency, as the store charges it. The ≈ figures are approximate, at today's exchange rate (ECB reference rates, 2026-11-06), rounded, and leave out shipping, import duty, GST/VAT and card fees. A camera bought abroad may not carry a local warranty: see grey-market cameras before you buy.
Used: what it should be worth
We've seen used RF-S 7.8mm F4 STM Dual prices on 3 days so far. A "should be worth" value appears after a week of used prices.
| Month | Cheapest | Typical | Highest | Days seen |
|---|---|---|---|---|
| Nov 2026 | $409 | $409 | $409 | 3 |
From used and refurbished asking prices at the stores we track, checked every few hours. Confirmed eBay sale prices will be added once eBay grants us access to its sold-listings data.
Videos
Reviews, comparisons and sample footage of the RF-S 7.8mm F4 STM Dual, on YouTube.
Discussions & forums
What owners say about the RF-S 7.8mm F4 STM Dual elsewhere, and here.
On CamCompare
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Comments are members' own opinions, not CamCompare's. Votes never change the order of prices.
Alternatives to the RF-S 7.8mm F4 STM Dual
More Canon lenses
- RF-S 3.9mm F3.5 STM Dual Fisheye · 2024
- RF-S 14-30mm F4-6.3 IS STM PZ · 2025
- RF-S 10-18mm F4.5-6.3 IS STM · 2023
- RF-S 55-210mm F5-7.1 IS STM · 2023
- RF-S 18-150mm F3.5-6.3 IS STM · 2022
- RF-S 18-45mm F4.5-6.3 IS STM · 2022
- RF 24mm F1.4L VCM · 2024
- RF 50mm F1.4L VCM · 2024
More Canon RF lenses like it
- Sigma 12mm F1.4 DC | Contemporary · 2025
- Sigma 10-18mm F2.8 DC DN | Contemporary · 2023
- Tamron 11-20mm F/2.8 Di III-A RXD · 2021
RF-S 7.8mm F4 STM Dual specifications
Optics
- Focal length
- 7.8mm
- 35mm equivalent
- 12mm equivalent
- Maximum aperture
- f/4
- Minimum aperture
- f/16
- Made for
- APS-C
- Elements / groups
- 9 / 7
- Aperture blades
- 7
- Closest focus
- 0.15 m
- Max magnification
- 0.07×
Focus & handling
- Autofocus
- Yes (STM)
- Optical stabilisation
- No
- Weather sealed
- No
- Internal zoom
- —
- Aperture ring
- No
- Teleconverter compatible
- No
Size & weight
- Weight
- 131 g
- Diameter × length
- 69.2 × 41.5 mm
- Filter thread
- 58 mm
Cameras it fits
All 7 →
Canon
EOS R50 V
APS-C · 24.2 MP · 2025
- 4K 60p
- 15 fps
Canon
EOS R100
APS-C · 24.1 MP · 2023
- 4K 25p
- 356 g
RED
KOMODO-X
Super 35 · 19.9 MP · 2023
- 6K video
- 1,188 g
Canon
EOS R50
APS-C · 24.2 MP · 2023
- 4K 30p
- 15 fps
Canon
EOS R10
APS-C · 24.2 MP · 2022
- 4K 60p
- 23 fps
Canon
EOS R7
APS-C · 32.5 MP · 2022
- IBIS
- 4K 60p
An APS-C lens also mounts on full-frame bodies of the same mount, where it crops the frame; those aren't listed.