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How to Choose a Lens Mount? 2026 Hong Kong Guide to the 8 Best Lens Mounts (Real-Time Price Comparison of In-Stock Items Across the Store)

Bottom line:When buying a lens, choose the focal length first, then the aperture, and only then compare first-party and third-party options. For the same focal length, an f/2.8 zoom typically costs 1.8–2.5 times as much as an f/4 zoom, but the difference is “usable indoors” versus “you’ll need to use a flash.” Our store currently has 363 lenses spanning 8 mounts.

1. First, get three things straight

  • Mounts cannot be mixed and matched——Sony E and Canon RF are not interchangeable, and using an adapter will reduce autofocus speed.
  • Focal length determines the angle of view, not “how many times”——50mm on APS-C is equivalent to 75mm, making it the equivalent of a full-frame “portrait lens.”
  • Aperture determines whether you can handhold indoors——f/1.8 provides two stops more light than f/4, meaning the shutter speed can be 4 times faster or the ISO can be 4 times lower.

2. Mount overview

MountSystemSensor formatIn stock at our store
Sony ESony A7/A6xxx/FXFull-frame+APS-C94 lenses
Nikon ZNikon ZFull-frame+APS-C(Z DX)65 lenses
Canon RFCanon EOS RFull-frame+APS-C(RF-S)63 lenses
Fujifilm XFujifilm X-T/X-SAPS-C57 lenses
Other mounts(M43/L/third-party)Olympus/Panasonic/Sigma LDepends on mount31 lenses
Canon EFCanon DSLRs(also compatible with an adapter)Full-frame+APS-C28 lenses
Nikon FNikon DSLRsFull-frame+APS-C20 lenses
Canon EF-MCanon EOS MAPS-C4 lenses
Fujifilm GFFujifilm GFXMedium Format1 lens

Sony E (94 lenses in stock)

Sony E is the mount with the widest selection of lenses in our store. Full-frame lenses start with FE, while APS-C lenses start with E, but both use the same mount—when an APS-C lens is mounted on a full-frame camera body, the camera automatically crops the image.

ModelPrice
SONY E PZ 16-50mm f/3.5-5.6 OSS BlackHK$825
SONY E PZ 16-50mm f/3.5-5.6 OSS SilverHK$825
SONY E 55-210mm f/4.5-6.3 OSS SilverHK$1,232
SONY E 55-210mm f/4.5-6.3 OSS BlackHK$1,232
SONY FE 50mm f/1.8HK$1,518
TAMRON 35mm f/2.8 Di III OSD M 1:2 for Sony EHK$1,540
SONY FE 28-60mm f/4-5.6HK$1,595
TAMRON 24mm f/2.8 Di III OSD M 1:2 for Sony EHK$1,650
TAMRON 20mm f/2.8 Di III OSD M 1:2 for Sony EHK$1,672
SONY E 50mm f/1.8 OSS BlackHK$1,705
SONY FE 28-70mm f/3.5-5.6 OSS (White box)HK$1,760
SIGMA 30mm f/1.4 DC DN Contemporary for Sony EHK$1,980
TAMRON 70-300mm F4.5-6.3 DI III RXD for Sony E (A047HK$2,398
SONY E 35mm f/1.8 OSSHK$2,453
SONY E 18-135mm f/3.5-5.6 OSSHK$2,530
SIGMA 56mm f/1.4 DC DN Contemporary for Sony EHK$2,640

See the remaining 78 lenses with the same mount on theLens Category page.

Nikon Z (65 lenses in stock)

With a 55mm diameter and a 16mm flange distance, the Z mount is the shortest in its class, which is why Z camera bodies can be made so thin. Z DX is designed exclusively for APS-C.

ModelPrice
NIKON NIKKOR Z DX 16-50mm f/3.5-6.3 VRHK$1,100
NIKON NIKKOR Z 24-50mm f/4-6.3HK$1,307
NIKON NIKKOR Z 28mm f/2.8HK$1,595
NIKON NIKKOR Z DX 24mm f/1.7HK$1,760
NIKON NIKKOR Z 40mm f/2 (SE)HK$1,914
NIKON NIKKOR Z 40mm f/2HK$1,914
NIKON NIKKOR Z DX 50-250mm f/4.5-6.3 VRHK$1,925
NIKON NIKKOR Z DX 12-28mm F3.5-5.6 PZ VRHK$2,090
NIKON NIKKOR Z DX 18-140mm f/3.5-6.3 VRHK$2,695
NIKON NIKKOR Z 50mm f/1.4HK$3,058
NIKON NIKKOR Z 26mm f/2.8HK$3,168
NIKON NIKKOR Z 50mm f/1.8 SHK$3,190
NIKON NIKKOR Z 24-70mm f/4 SHK$3,410
TAMRON 70-300mm f/4.5-6.3 Di III RXD Lens for Nikon HK$3,465
NIKON NIKKOR Z 35mm f/1.4HK$3,685
NIKON NIKKOR Z 85mm f/1.8 SHK$4,158

See the remaining 49 lenses with the same mount atLens category page.

Canon RF (63 lenses in stock)

The RF mount has a flange distance of only 20mm. This short flange distance allows Canon to produce specifications such as an f/2 constant-aperture zoom. RF-S is designed exclusively for APS-C.

ModelPrice
CANON RF-S 18-45mm f/4.5-6.3 IS STMHK$495
CANON RF 14-30mm F4-6.3 IS STM PZHK$990
CANON RF 24-50mm f/4.5-6.3 IS STMHK$1,078
CANON RF 50mm f/1.8 STMHK$1,265
CANON RF 75-300mm f/4-5.6HK$1,353
CANON RF-S 55-210mm f/5-7.1 IS STMHK$1,518
CANON RF 16mm f/2.8 STMHK$1,738
CANON RF 28mm f/2.8 STMHK$1,815
CANON RF-S 10-18mm f/4.5-6.3 IS STMHK$1,903
CANON RF 24-105mm f/4-7.1 IS STMHK$2,420
CANON RF-S 18-150mm f/3.5-6.3 IS STMHK$2,640
CANON RF 15-30mm F4.5-6.3 IS STMHK$2,728
CANON RF 45mm F1.2 STMHK$2,805
CANON RF 35mm f/1.8 IS Macro STMHK$3,102
SIGMA 18-50mm f/2.8 DC DN Contemporary for Canon RFHK$3,300
CANON RF 24mm f/1.8 Macro IS STMHK$3,333

See the remaining 47 lenses with the same mount atLens Category Page.

Fujifilm X (57 in stock)

Fujifilm only offers APS-C (the GF series is medium format). XC is the entry-level lightweight range, while XF is the main range with stronger optics. XF lenses with the same focal length are typically 40–80% more expensive.

ModelPrice
FUJI XC 15-45MM F3.5-5.6 OIS PZ BlackHK$935
FUJI XC 13-33mm f/3.5-6.3 OISHK$1,100
FUJI XC 50-230mm f/4.5-6.7 OIS II BlackHK$1,320
FUJI XC 35mm f/2HK$1,518
Fujifilm FUJINON XC 50-230mm f/4.5-6.7 OIS II Lens -HK$1,650
FUJI XF 27mm f/2.8 R WRHK$2,255
FUJI XF 50mm f/2 R WR BlackHK$2,365
FUJI XF 35mm f/2 R WR BlackHK$2,398
SIGMA 56mm f/1.4 DC DN Contemporary for Fujifilm XHK$2,508
FUJI XF 35mm f/2 R WR SilverHK$2,585
FUJI XF 23MM F2 R WR BlackHK$2,640
FUJI XF 23mm F2.8 R WR BlackHK$2,882
SIGMA 23mm f/1.4 DC DN Contemporary for Fujifilm XHK$3,025
FUJI XF 16-50mm f/2.8-4.8 R LM WRHK$3,223
SIGMA 18-50mm f/2.8 DC DN Contemporary for Fujifilm HK$3,278
FUJI XF 16-80mm f/4 R OIS WRHK$3,542

See the remaining 41 lenses with the same mount on theLens Category Page.

Canon EF (28 lenses in stock)

EF is a mount from the DSLR era. With an adapter, it can be used on EOS R bodies with focusing speeds close to native performance. If you already own EF lenses, adapting them is the most cost-effective upgrade path.

ModelPrice
CANON EF 50mm f/1.8 STMHK$836
CANON EF-S 18-55mm f/3.5-5.6 IS STMHK$1,045
CANON EF-S 24mm F2.8 STMHK$1,078
CANON EF 75-300mm f/4-5.6 IIIHK$1,430
CANON EF-S 10-18mm F4.5-5.6 IS STM Black (Color Box)HK$1,518
CANON EF 50mm f/1.4 USMHK$1,870
CANON EOS 2000D Black KIT EF-S 18-55mm F3.5-5.6 IS IHK$2,475
CANON EF-S 18-135mm f/3.5-5.6 IS USMHK$2,618
CANON EF-S 10-22mm F3.5-4.5 USMHK$2,640
CANON EOS 4000D KIT EF-S 18-55MM F3.5-5.6 IIIHK$2,750
CANON EOS 2000D Black KIT EF-S 18-55mm F3.5-5.6 IIIHK$2,750
CANON EF 70-300mm f/4-5.6 IS II USMHK$3,850
CANON EF-S 17-55mm F2.8 IS USMHK$4,290
SIGMA 35mm f/1.4 DG HSM Art for Canon EFHK$4,620
SIGMA 18-35mm f/1.8 DC HSM Art for Canon EFHK$4,840
CANON EF 16-35mm f/4L IS USMHK$5,940

See the remaining 12 lenses with the same mount on theLens Category Page.

Fujifilm GF (1 lens in stock)

ModelPrice
FUJI GF 110mm f/5.6 T/S MacroHK$24,640

Other mounts (M43/L/third-party) (31 in stock)

ModelPrice
Tamron AF 55-200mm F/4.0-5.6 Di-II LD Macro Lens forHK$550
OLYMPUS M.Zuiko Digital ED 14-42mm f/3.5-5.6 EZ BlacHK$1,320
Tokina AT-X 12-28mm f/4 AFHK$1,384
OLYMPUS M.Zuiko Digital 45mm f/1.8 SilverHK$1,386
OLYMPUS M.Zuiko Digital 45mm f/1.8 BlackHK$1,386
OLYMPUS M.Zuiko Digital ED 14-42mm f/3.5-5.6 EZ SilvHK$1,430
NIKON AF NIKKOR 50mm f/1.4 DHK$1,980
OLYMPUS M.Zuiko Digital ED 9-18mm f/4-5.6HK$2,860
NIKON Z30 KIT 16-50mm F3.5-6.3 VRHK$4,125
SIGMA 10-18mm f/2.8 DC DN Contemporary for CanonHK$4,235
SONY ZV-E10 KIT 16-50mm F3.5-5.6 OSS (Black)HK$4,455
SONY ZV-E10 KIT 16-50mm F3.5-5.6 OSS (White)HK$4,455
OLYMPUS OM SYSTEM PEN E-P7 Digital Camera + 14-42mm HK$4,455
NIKON Z50 KIT 16-50mm F3.5-6.3 VRHK$4,565
OLYMPUS OM SYSTEM PEN E-P7 Digital Camera + 14-42mm HK$4,840
SIGMA 17-40mm f/1.8 DC ART – CANONHK$5,729

See the remaining 15 lenses with the same mount on theLens Category page.

3. Choose directly by use

Portraits: 35/50/85mm prime lenses

ModelPrice
CANON EF 50mm f/1.8 STMHK$836
CANON RF 50mm f/1.8 STMHK$1,265
SONY FE 50mm f/1.8HK$1,518
FUJI XC 35mm f/2HK$1,518
TAMRON 35mm f/2.8 Di III OSD M 1:2 for Sony EHK$1,540
SONY E 50mm f/1.8 OSS BlackHK$1,705

Travel: One lens for every journey (24-70 or 18-135 class)

ModelPrice
Nikon AF-S DX NIKKOR 18-140mm f/3.5-5.6G ED VRHK$1,650
SONY FE 28-70mm f/3.5-5.6 OSS (White box)HK$1,760
CANON RF 24-105mm f/4-7.1 IS STMHK$2,420
SONY E 18-135mm f/3.5-5.6 OSSHK$2,530
CANON EF-S 18-135mm f/3.5-5.6 IS USM (White Box)HK$2,618
CANON RF-S 18-150mm f/3.5-6.3 IS STM (White Box)HK$2,640

Telephoto / Wildlife: 70-200 and 100-400 class

ModelPrice
CANON RF 100-400mm f/5.6-8 IS USMHK$4,565
SIGMA 100-400mm f/5-6.3 DG DN OS Contemporary for HK$5,610
TAMRON 150-500mm f/5-6.7 Di III VC VXD Lens for SoHK$6,105
TAMRON 150-500mm F/5-6.7 Di III VC VXD (A057) — NiHK$7,040
TAMRON 150-500mm f/5-6.7 Di III VC VXD Lens for FuHK$7,755
SONY FE 70-200mm f/4 G OSSHK$8,250

Wide-angle / Landscape: 16mm and below

ModelPrice
CANON RF-S 18-45mm f/4.5-6.3 IS STM (White Box)HK$495
SONY E PZ 16-50mm f/3.5-5.6 OSS Black (White Box)HK$825
SONY E PZ 16-50mm f/3.5-5.6 OSS Silver (White Box)HK$825
CANON EF-M 15-45mm F3.5-6.3 IS STM Black (White BoHK$935
FUJI XC 15-45MM F3.5-5.6 OIS PZ Black (White Box)HK$935
CANON RF 14-30mm F4-6.3 IS STM PZHK$990

4. Original vs. Third-Party

ItemOriginal Manufacturer(Sony/Canon/Nikon/Fuji)Third-Party(Sigma/Tamron/Tokina)
PriceHighUsually 25–45% lower for comparable specifications
AutofocusBest matched with the camera body's algorithmsNearly on par in recent years, though some lenses are slightly slower
OpticsStable, with little sample variationArt/Di III series offer very high performance
Resale ValueBetterLower
Firmware UpdatesDirectly supported by the original manufacturerRequires the manufacturer's own dock or an adapter

In practice: third-party options are limited for ultra-wide-angle and telephoto lenses, so original manufacturers still have the advantage; for standard zooms and fast primes, third-party lenses offer significantly better value for money.

5. Frequently Asked Questions

Is it worth keeping a kit lens?

The value of a kit zoom lies in being lightweight, affordable, and good enough. If you have already bought an f/2.8 constant-aperture zoom, you can sell the kit lens.

What is a White Box?

White Box refers to parallel-imported goods that come without a retail color box and are packaged in a plain white box. They are usually lenses removed from a camera body kit and sold separately. The optics and boxed version are the same, but the warranty is usually provided only by the retailer.

Prime or zoom?

Buy a zoom as your first lens(to get familiar with focal lengths), then a prime as your second lens(to pursue image quality and a wider aperture).

Do I need a UV filter?

In the digital era, the main purpose of a UV filter is to protect the front element. Buying one good filter(HK$200 or more)is more practical than buying three cheap ones.

Can lenses get moldy?

Hong Kong has high humidity, so store lenses in an electronic dry cabinet for long-term storage, with the humidity set to 40–50%.

Is it worth buying an adapter?

It is worthwhile if you already own a large number of EF or F-mount lenses. Otherwise, buying a native-mount lens directly is more convenient.

6. Pre-Purchase Lens Checklist

  • Confirm that the mount matches the camera body(RF/E/Z/X)
  • Confirm whether it is full-frame(FE/RF/Z)or APS-C-only(E/RF-S/Z DX/XC)
  • Confirm whether it is a White Box or a color box(this affects the warranty)
  • Test autofocus on-site: move from near to far and back three times, and listen for any abnormal noise
  • Check the front and rear elements for scratches and the interior for mold spots
  • Confirm that the lens hood and front and rear caps are included
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