Key Considerations:
* Aperture (f-stop): A wider aperture (e.g., f/1.2, f/1.4, f/1.8) is generally preferred for portraits. It allows more light in, resulting in a shallower depth of field (more background blur or "bokeh") and better low-light performance.
* Image Quality: Sharpness, contrast, color rendition, and the quality of bokeh are crucial.
* Autofocus Performance: Speed, accuracy, and quietness of autofocus are important, especially for portraits of moving subjects (e.g., children).
* Build Quality: Consider the lens's durability, weather sealing, and overall feel.
* Price: 50mm lenses range from very affordable to extremely expensive.
* Manual Focus: If you enjoy manual focus, especially for fine-tuning focus for specific creative effects, the smoothness and precision of the focus ring are crucial.
Top 50mm Lens Recommendations (Sorted by rough price range):
Budget-Friendly Options (Excellent Value):
1. Canon EF 50mm f/1.8 STM: (Canon DSLRs) This is often the go-to recommendation for beginners. It's incredibly affordable, lightweight, and offers decent image quality and a significant upgrade in background blur compared to kit lenses. The STM (Stepping Motor) autofocus is relatively quiet and smooth. Pros: Price, size, improved STM autofocus. Cons: Build quality is plastic, autofocus can be a bit slower in challenging conditions.
2. Nikon AF-S Nikkor 50mm f/1.8G: (Nikon DSLRs) Similar to the Canon f/1.8, this lens provides excellent value. It's sharp, compact, and has a good autofocus system. Pros: Price, sharpness, relatively fast autofocus. Cons: Plastic build, some users find the bokeh less appealing than other options.
3. Yongnuo 50mm f/1.8: (Available for Canon, Nikon, Sony E-mount) If you're *really* on a tight budget, Yongnuo offers a cheaper alternative. Image quality and build quality are a step down from the Canon/Nikon f/1.8 lenses, but it's still a usable option. Pros: Very cheap, allows you to experiment with a fast 50mm. Cons: Noticeably lower image quality, slower and less accurate autofocus, questionable build.
Mid-Range Options (Better Performance and Build):
4. Sony FE 50mm f/1.8: (Sony E-mount Full Frame) A solid, affordable choice for Sony full-frame users. Offers good sharpness and bokeh. Pros: Good balance of price and performance, compact. Cons: Autofocus can be a bit noisy and not the fastest.
5. Sigma 50mm f/1.4 DG HSM Art: (Available for Canon, Nikon, Sony E-mount, Leica L) - A major step up in image quality compared to the f/1.8 lenses. Sharper, better contrast, and beautiful bokeh. The build quality is excellent. Pros: Superb image quality, excellent build. Cons: Larger, heavier, more expensive than f/1.8 options.
High-End Options (Top Image Quality and Features):
6. Canon RF 50mm f/1.2L USM: (Canon RF Mount - Mirrorless) Considered among the sharpest 50mm lenses available. The f/1.2 aperture offers incredibly shallow depth of field and excellent low-light performance. Pros: Exceptional image quality, extremely shallow depth of field. Cons: Very expensive, large and heavy.
7. Nikon NIKKOR Z 50mm f/1.2 S: (Nikon Z Mount - Mirrorless) Nikon's equivalent of the Canon RF 50mm f/1.2L. Offers similar levels of sharpness, bokeh, and low-light capabilities. Pros: Outstanding image quality, beautiful bokeh. Cons: Expensive, large and heavy.
8. Sony FE 50mm f/1.2 GM: (Sony E-mount Full Frame) Sony's premium 50mm lens, renowned for its sharpness, bokeh, and fast, reliable autofocus. Pros: Excellent image quality, fast and accurate autofocus, professional-grade build. Cons: Very expensive.
9. Sigma 50mm f/1.2 DG DN Art: (Available for Sony E-mount, Leica L) Sigma's entry into the f/1.2 world is stunning! Similar image quality to the Sony GM, but at a slightly lower price point. Pros: Insane Image Quality, slightly smaller and lighter than its competitors. Cons: Still Expensive.
Specialty Option:
* Lensbaby Velvet 56: (Available for most mounts) If you're looking for a unique, dreamy, soft-focus look, the Lensbaby Velvet 56 is a great choice. It's designed to create a vintage-inspired aesthetic. Pros: Unique soft-focus effect, excellent for creative portraits. Cons: Not for those seeking sharp, clinical images, manual focus only.
How to Choose:
1. Consider your budget: How much are you willing to spend?
2. Identify your camera system: Make sure the lens is compatible with your camera's mount (Canon EF/RF, Nikon F/Z, Sony E, Fuji X, etc.).
3. Think about your shooting style: Do you primarily shoot in low light? Do you need fast autofocus for capturing moving subjects?
4. Read reviews and compare images: Look at sample images taken with different lenses to get a sense of their image quality and bokeh.
In summary:
* Best Budget Option: Canon EF 50mm f/1.8 STM or Nikon AF-S 50mm f/1.8G (depending on your camera)
* Best Value (Mid-Range): Sigma 50mm f/1.4 DG HSM Art
* Best Overall (High-End): Sony FE 50mm f/1.2 GM or Sigma 50mm f/1.2 DG DN Art
* Most Unique: Lensbaby Velvet 56
Ultimately, the best 50mm lens for *you* is the one that meets your needs and fits your budget. Good luck with your search!