Let us get this out of the way: it is not 4K
The Samsung Q5F 40-inch is Full HD (1920 × 1080), not 4K. That goes in the first paragraph because you were going to ask, and it is better said here than discovered halfway down a specification table.
What follows is the part that matters: at 40 inches, this matters far less than you would think — and there is simple arithmetic that shows why.
When you can actually see the difference
The human eye resolves detail down to roughly one arcminute. Combine that with a screen's pixel pitch and you can calculate the distance beyond which individual pixels stop being resolvable.
A 40-inch 16:9 screen is 0.498 m tall. Divided by 1080 lines, each pixel is 0.461 mm across. Which gives:
| Screen | Pixel pitch | Pixels invisible beyond |
|---|---|---|
| 40-inch Full HD (this set) | 0.461 mm | 1.59 m |
| 40-inch 4K (hypothetically) | 0.231 mm | 0.79 m |
| 43-inch 4K | 0.247 mm | 0.85 m |
In other words: sit further than 1.6 m away and a 40-inch Full HD screen and a 40-inch 4K screen look identical to you — the extra pixels are beyond what your eye can resolve.
And where does a 40-inch set usually go in Hong Kong? A bedroom, a study, a kitchen, or as a second set in a compact flat. Typical seating distances in those rooms run 1.5 to 2.5 m — comfortably past the line. For more background on resolution, see our 4K resolution guide.
But in fairness: a 43-inch 4K set costs less
This is the situation on our own shelves, and there is no point hiding it:
| Model | Specification | Reference price |
|---|---|---|
| TCL 43-inch V6C | 43-inch, 4K | about HK$2,250 |
| Samsung Q5F 40-inch | 40-inch, Full HD, QLED | about HK$2,380 |
| Samsung U8000H 43-inch | 43-inch, 4K Crystal UHD | about HK$2,780 |
Yes — a 43-inch 4K set costs less than this 40-inch Full HD one. You would see it the moment you opened the 43-inch collection, so we would rather say it first.
So why would anyone buy the 40-inch? The answer is not picture quality. It is the size itself.
What 40 inches is actually for: the spaces 43 will not fit
The Q5F 40-inch body is 906.3 mm wide; a typical 43-inch is around 958 mm. Five centimetres — which sounds trivial until it is the difference between fitting and not:
- A fitted cabinet recess — built-in joinery with a width you cannot change
- A narrow wall or the gap between columns — where you also need clearance for an air-conditioning duct or a door frame
- A kitchen counter, breakfast bar or small office — where both width and depth are tight
- A rental where you would rather not drill — 157.6 mm deep with the stand, so it sits on shelves that a larger set will not
There is also a figure almost nobody quotes: the stand itself is only 646.7 mm wide and 157.6 mm deep. People assume a 40-inch set needs a 91 cm shelf, when what actually touches the surface is 64.7 cm. That is the number to measure against, not the width of the whole set.
It also weighs 6.2 kg with the stand — one person can carry it and one person can set it up, which matters when you move flat or reshuffle a room. If you do mount it, the pattern is VESA 200 × 200.
Two HDMI ports — count them before you order
The Q5F 40-inch has only two HDMI ports, one supporting eARC. This is the most real limitation in the set, so add up what you need to connect:
- Add a soundbar and the eARC port is taken, leaving one
- Add a set-top box and both are gone
- Add a console or a laptop and you are swapping cables or buying an HDMI switch
If your list runs past two devices, either choose a model with three or four ports, or budget for a switch. This is arithmetic to do before ordering, not after.
Picture and sound
Picture — the QLED quantum dot panel with PurColor gives more appealing colour than an ordinary LED set at this price, with Mega Contrast and Micro Dimming Pro handling contrast, plus Quantum HDR and HDR10+ support. The panel is 50Hz: fine for drama and streaming, not a gaming set.
Sound — 20W across two channels with OTS Lite object tracking and Adaptive Sound. Enough for a small room. If you want better, note that it supports Q-Symphony, which is unusual at HK$2,380: pair a Samsung soundbar and the television's own speakers keep playing alongside it rather than switching off.
The platform is One UI Tizen with Samsung Knox security, and Samsung states plainly that Tizen OS upgrades will be provided for seven years from the 2025 release year. A bedroom set easily lasts seven or eight years, so that window means apps will not quietly stop working halfway through.
Specifications
| Item | Specification |
|---|---|
| Model | QA40Q5FAAKXXT (Thai version) |
| Resolution | 1,920 × 1,080 (Full HD) |
| Panel | Real QLED quantum dot, cadmium-free; TUV Rheinland Real Quantum Dot Display certified |
| Refresh | 50Hz |
| Picture engine | Hyper Real |
| HDR | Quantum HDR, HDR10+ |
| Colour and contrast | PurColor, Contrast Enhancer, Mega Contrast, Micro Dimming Pro |
| Audio | 20W 2 channels, OTS Lite, Adaptive Sound, Q-Symphony |
| HDMI | 2 ports (one with eARC) |
| Other inputs | 1 × USB-A |
| Wireless | Wi-Fi 5, Bluetooth 5.2 |
| Platform | One UI Tizen; officially seven years of free OS upgrades from 2025 |
| Security | Samsung Knox multi-layer security |
| Voice | Bixby (Voice Ready) |
| Tuner | Digital DVB-T2 |
| Body (with stand) | 906.3 × 546.0 × 157.6 mm, 6.2 kg |
| Body (no stand) | 906.3 × 519.3 × 74.8 mm, 6.1 kg |
| Stand footprint | 646.7 × 157.6 mm |
| Wall mount | VESA 200 × 200 mm |
| Power | 75W max / 41W typical / 0.5W standby |
On that 41W figure: at four hours a day it works out to roughly 5 kWh a month, or under ten Hong Kong dollars of electricity. Running cost is effectively a non-issue.
Who should not buy it
- Anyone wanting a main living-room set — 40 inches is too small there, and Full HD at living-room distance leaves detail on the table; start at 55 inches
- Gamers — a 50Hz panel and two HDMI ports say otherwise
- Anyone with several devices — two ports go quickly
- Anyone whose space fits 43 inches — measure first, because if 43 fits, the same money or less buys 4K and a bigger screen
If what you actually want is smaller, see the 32-inch collection; if you want 4K, start with the 43-inch collection.
Delivery, installation and warranty
The 40-inch is charged at the 43-inch rate: delivery with tabletop setup HK$300; wall mounting HK$600 (bracket included). Walk-up buildings add HK$100 per floor with no cap, Discovery Bay adds HK$500, and service covers Hong Kong Island, Kowloon and the New Territories. That said — at 6.2 kg, the tabletop setup is something you can do yourself in ten minutes.
Warranty: international-version televisions carry 10-day exchange plus a 3-year on-site warranty. The three-year cover includes on-site inspection and diagnosis and unlimited labour; it excludes parts (quoted first, done only after you confirm), user-caused damage and some outlying islands. The 10-day exchange runs from the day installation completes, must be verified by our technician, and allows a model change. Full terms are on the international-version warranty policy.
Frequently asked questions
The Q5F 40-inch is not 4K — will it look bad?
It depends how far away you sit. A 40-inch Full HD screen has a 0.461 mm pixel pitch, and at roughly one arcminute of visual acuity, pixel structure stops being resolvable beyond 1.59 m — meaning that at the same size, a 4K panel would look no different to you. A 40-inch set in Hong Kong usually goes in a bedroom, study or kitchen where seating distance runs 1.5 to 2.5 m, comfortably past that line. For a main living-room set, though, do not choose 40 inches.
Why does a 43-inch 4K set cost less than this 40-inch Full HD one?
It genuinely does — on our own shelves the TCL 43-inch V6C 4K is about HK$2,250 against HK$2,380 for the Q5F 40-inch. So if your space fits a 43-inch, frankly take the larger set. The 40-inch earns its place on dimensions, not picture: its body is 906.3 mm wide, about 5 cm narrower than a 43-inch, and in a fitted cabinet, a narrow wall or on a kitchen counter those 5 cm decide whether it fits at all.
Are two HDMI ports enough?
Count your devices. A soundbar takes the eARC port, leaving one; a set-top box takes the second. Adding a console or a laptop after that means swapping cables or buying an HDMI switch. If your list runs past two devices, choose a model with three or four ports.
What is worth knowing at this price?
Two things that are unusual at HK$2,380. First, Q-Symphony: pair a Samsung soundbar and the set's own speakers keep playing alongside it instead of switching off. Second, Samsung states that Tizen OS upgrades will be provided for seven years from the 2025 release year, so apps will not quietly stop working part-way through the set's life.
Will it pick up Hong Kong free-to-air channels from an aerial?
Hong Kong local-version sheets list DTMB, the Hong Kong broadcast standard, while international-version sheets list DVB-T2 — this is the one genuine difference between the two. We have tested reception of local free-to-air channels in Hong Kong and our technician tunes them during installation; but if your building's aerial signal is weak, or you rely on an aerial rather than streaming, please contact us before installation. If you watch through a set-top box or streaming, none of this affects you.
Buying from Elechid
The Samsung Q5F 40-inch is in stock; current pricing and availability are on the product page. Stock is held at our Kwun Tong premises, which is a collection point only — there is no demonstration or side-by-side comparison setup, so please WhatsApp us to arrange a time before coming.
For pricing, stock and delivery timing — WhatsApp +852 9847 9793, or call +852 3709 6847 (11:00 – 19:00). To see other sizes, start with the smart TV collection.
About this article
Specifications follow Samsung Thailand's official product page (model QA40Q5FAAKXXT) as the primary source, with rows the Thai page does not publish taken from Samsung's Malaysian and Australian official pages. Viewing distances are calculated from pixel pitch and typical visual acuity and are theoretical; perception varies between individuals. Comparison prices come from our own product pages on the date of writing. Warranty terms follow our warranty policy page.
