Canon RF-S 18-45mm f/4.5-6.3 IS STM vs Canon RF-S 55-210mm f/5-7.1 IS STM
The bottom line
These cover different focal lengths — the Canon RF-S 18-45mm f/4.5-6.3 IS STM is 18-45mm, the Canon RF-S 55-210mm f/5-7.1 IS STM is 55-210mm — so they're not really substitutes. Pick by the field of view you actually need: the Canon RF-S 18-45mm f/4.5-6.3 IS STM for standard, the Canon RF-S 55-210mm f/5-7.1 IS STM for telephoto.
Choose the Canon RF-S 18-45mm f/4.5-6.3 IS STM if…
- ✓You shoot wide — it starts at 18mm vs 55mm for landscapes, interiors and architecture.
- ✓You value portability — at 149g (5.3 oz) it's lighter than the 270g (9.5 oz) alternative for travel and all-day carry.
- ✓You use filters or shoot video — internal zoom keeps length and balance constant.
Choose the Canon RF-S 55-210mm f/5-7.1 IS STM if…
- ✓You need more reach — it goes to 210mm vs 45mm for distant subjects, wildlife and sport.
Where they differ
- ›Aperture: the Canon RF-S 18-45mm f/4.5-6.3 IS STM opens to f/4.5 vs the Canon RF-S 55-210mm f/5-7.1 IS STM's f/5 — more light and shallower depth-of-field.
- ›Focal range: Canon RF-S 18-45mm f/4.5-6.3 IS STM is 18-45mm, Canon RF-S 55-210mm f/5-7.1 IS STM is 55-210mm — different framing and reach.
- ›Weight: the Canon RF-S 18-45mm f/4.5-6.3 IS STM is 149g (5.3 oz) vs 270g (9.5 oz) — you'll feel the difference handheld.
Frequently asked
Is the Canon RF-S 18-45mm f/4.5-6.3 IS STM or the Canon RF-S 55-210mm f/5-7.1 IS STM better?
These cover different focal lengths — the Canon RF-S 18-45mm f/4.5-6.3 IS STM is 18-45mm, the Canon RF-S 55-210mm f/5-7.1 IS STM is 55-210mm — so they're not really substitutes. Pick by the field of view you actually need: the Canon RF-S 18-45mm f/4.5-6.3 IS STM for standard, the Canon RF-S 55-210mm f/5-7.1 IS STM for telephoto.
Who should choose the Canon RF-S 18-45mm f/4.5-6.3 IS STM?
Choose the Canon RF-S 18-45mm f/4.5-6.3 IS STM if you shoot wide — it starts at 18mm vs 55mm for landscapes, interiors and architecture. Choose it if you value portability — at 149g (5.3 oz) it's lighter than the 270g (9.5 oz) alternative for travel and all-day carry. Choose it if you use filters or shoot video — internal zoom keeps length and balance constant.
Who should choose the Canon RF-S 55-210mm f/5-7.1 IS STM?
Choose the Canon RF-S 55-210mm f/5-7.1 IS STM if you need more reach — it goes to 210mm vs 45mm for distant subjects, wildlife and sport.
What is the main difference between the Canon RF-S 18-45mm f/4.5-6.3 IS STM and the Canon RF-S 55-210mm f/5-7.1 IS STM?
Aperture: the Canon RF-S 18-45mm f/4.5-6.3 IS STM opens to f/4.5 vs the Canon RF-S 55-210mm f/5-7.1 IS STM's f/5 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 18-45mm | 55-210mm |
| Lens Type | Zoom | Zoom |
| Optical Elements | 11 | 13 |
| Optical Groups | 9 | 11 |
| Aperture & Iris | ||
| Maximum Aperture | f/4.5 | f/5 |
| Minimum Aperture | f/22 | f/22 |
| Aperture Blades | 7 | 7 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | APS-C | APS-C |
| Lens Mount | Canon RF | Canon RF |
| Angle of View | 76° – 35° | 29° – 8° |
| 35mm Equivalent | 29-72mm | 88-336mm |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | STM | STM |
| Focus Limiter | No | No |
| AF/MF Switch | No | No |
| Min Focus Distance | 25 cm | 85 cm |
| Max Magnification | 0.29x | 0.34x |
| Stabilization & Video | ||
| Optical Stabilization | Yes | Yes |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | Yes | No |
| General | ||
| Price (MSRP) | $299 | $329 |
| Filter Size | 49mm | 55mm |
| Diameter | 68.1mm | 73.6mm |
| Length | 44.8mm | 113.9mm |
| Weight | 149g (5.3 oz) | 270g (9.5 oz) |
| Weather Sealed | No | No |
| Tripod Collar | No | No |
