Sigma 30mm f/1.4 DC DN
Score: 78/100
Canon RF 50mm f/1.8
Score: 73/100Rankings
The Sigma 30mm f/1.4 Contemporary delivers a bright aperture, excellent sharpness and quiet autofocus in a compact package for Sony APS-C bodies. It lacks weather sealing and built-in stabilization, and its focal length is fixed at a 45 mm equivalent, which may limit versatility.
The Canon RF 50mm F1.8 STM is a pocket-sized, affordable standard prime delivering sharp central performance and a bright aperture for low-light work. While it lacks weather sealing and shows some corner softness and vignetting, its quiet STM motor and control ring make it ideal for beginners and vloggers.
| Attribute | | |
|---|---|---|
| ↓ lower better | 30 mmbest | 50 mm |
30 mm | 50 mmbest | |
| ↓ lower better | 1.4 fbest | 1.8 f |
| ↓ lower better | 265 g | 159 gbest |
| ↓ lower better | 73.7 mm | 40.5 mmbest |
| ↓ lower better | 30 cmbest | 30 cmbest |
0.143 x | 0.25 xbest | |
48 monthsbest | 12 months |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Mount & Compatibility(2) | ||
Mount Type | Sony E | Canon RF |
Autofocus Motor Type | Stepping motor | STM |
Optical(5) | ||
Focal Length (Min) (mm) | 30 mm | 50 mm |
Focal Length (Max) (mm) | 30 mm | 50 mm |
Maximum Aperture (f-number) (f) | 1.4 f | 1.8 f |
Maximum Magnification Ratio (x) | 0.143 x | 0.25 x |
Coating Type | Sigma Super Multi-Layer Coating | Super Spectra Coating |
Build & Durability(1) | ||
Warranty Period (months) | 48 months | 12 months |
Physical(3) | ||
Weight (g) | 265 g | 159 g |
Length (mm) | 73.7 mm | 40.5 mm |
Filter Thread Diameter (mm) | 52 mm | 43 mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers rate the Sigma 30mm f/1.4 DC DN highly, highlighting its exceptional sharpness, fast aperture, and quiet autofocus, while noting the lack of weather sealing and its relatively larger size.
Overall sentiment is positive, praising razor-sharp images and creamy bokeh, with complaints about the absence of weather sealing and the lens's size.
Professional reviewers agree the RF 50mm F1.8 STM fills a critical gap in Canon's mirrorless lineup, offering a bargain-priced, sharp, and compact standard prime, though it suffers from corner softness, vignetting, and modest bokeh.
Everyday users rate the lens highly, praising its sharpness, low-light capability, tiny size and quiet AF, while noting AF noise, soft corners at wide apertures, and a plasticky feel.
“Super sharp and fast lens”
“Excellent performance in low light (e.g., gym basketball photography)”
“must-have for RF shooters”
