BM Premium 420mm Lens 420-800mm
Canon EF-S 18-135mm f/3.5-5.6 IS USM
What Buyers Say
BM Premium 420mm Lens 420-800mm
The lens receives mixed feedback: some users praise its value for money and image quality for certain uses like architecture, but many report serious issues including incompatibility with Canon EOS R8, poor image quality, flimsy plastic build, and slow autofocus unsuitable for wildlife. The need for a tripod due to bulkiness and manual focus annoyance are also noted.
Pros
- Good value for money
- Decent image quality for architecture
- Pleasant for certain projects
Cons
- Incompatible with Canon EOS R8
- Poor image quality
- Flimsy plastic zoom mechanism
- Slow autofocus for wildlife
- Bulky requiring tripod
Canon EF-S 18-135mm f/3.5-5.6 IS USM
The Canon EF-S 18-135mm f/3.5-5.6 IS STM lens is widely praised as a versatile all-in-one walk-around lens for APS-C cameras. Users consistently highlight its silent and smooth STM autofocus, effective image stabilization, and useful zoom range that covers wide-angle to short telephoto. While image quality is considered very good for a kit-level zoom, some reviewers note softness at extreme focal lengths, barrel distortion at 18mm, and a variable aperture that limits low-light performance. Build quality is described as mostly plastic but adequate, though the focus-by-wire manual ring and occasional stiff zoom ring draw criticism.
Pros
- Silent and smooth STM autofocus
- Effective image stabilization
- Versatile 18-135mm zoom range
- Good image quality for a kit lens
- Lightweight and compact design
Cons
- Softness at extreme focal lengths
- Barrel distortion at 18mm
- Variable aperture limits low-light use
- Focus-by-wire manual ring
- Plastic build feels cheap
Scores
Specifications
| BM Premium 420mm Lens 420-800mm | Canon EF-S 18-135mm f/3.5-5.6 IS USM | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 420 mm | 18 mm |
| Focal Length Max | 1600 mm | 135 mm |
| Elements | — | 16 |
| Groups | — | 12 |
| Aspherical Elements | — | 1★ |
| ED Elements | — | 1★ |
| Coating | multi-coated | Super Spectra Coating |
| Aperture | ||
| Max Aperture | f/8.3 | f/3.5 |
| Min Aperture | f/8.3 | 3.5-5.6 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | — | 7★ |
| Build | ||
| Mount | Canon RF | Canon EF-S |
| Format | — | APS-C★ |
| Weather Sealed | — | ✗ |
| Weight | 1.14 kg | 0.52 kg★ |
| Filter Thread | 62 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | manual focus only | STM★ |
| Stabilization | ✓ | ✓ |
| Stabilization Stops | — | 4 stops★ |
| Focus | ||
| Min Focus Distance | 420 mm | 390 mm★ |
| Max Magnification | — | 0.28x★ |
Pros & Cons
BM Premium 420mm Lens 420-800mm
- Strong versatility (86th percentile)86th %ile
- Strong stabilization (79th percentile)
- Below average user sentiment (1st percentile)1st %ile
- Below average build (14th percentile)14th %ile
- Below average af (15th percentile)15th %ile
Canon EF-S 18-135mm f/3.5-5.6 IS USM
- Strong versatility (96th percentile)96th %ile
- Strong stabilization (92nd percentile)92nd %ile
- Strong af (85th percentile)85th %ile
- Strong aperture (83rd percentile)83rd %ile
- Below average user sentiment (32nd percentile)
Verdict
Scores 86 overall, wins 9 of 9 usage categories and 9 of 22 specs.