1. For Budget-Conscious Beginners (Excellent Value):
* Yongnuo 50mm f/1.8: This lens is ridiculously affordable and offers surprisingly good image quality for the price. It's a great way to experiment with a 50mm lens without breaking the bank. Autofocus is slower and noisier than more expensive options, but the image quality is surprisingly decent, especially stopped down a little.
* Pros: Extremely affordable, lightweight, good image quality when stopped down.
* Cons: Slower, noisier autofocus, plastic build quality.
* Canon EF 50mm f/1.8 STM: A budget-friendly option for Canon users. Improved autofocus motor over the older f/1.8 II version, resulting in quieter and smoother operation. Sharp image quality, lightweight, and a good option for beginners.
* Pros: Affordable, good image quality, STM autofocus motor (quieter and smoother).
* Cons: Plastic build quality.
* Nikon AF-S NIKKOR 50mm f/1.8G: A similar option to the Canon for Nikon users. Good image quality, relatively fast and quiet autofocus, and a good value for the price.
* Pros: Affordable, good image quality, relatively fast and quiet autofocus.
* Cons: Plastic build quality.
2. Mid-Range Options (Good Balance of Price and Performance):
* Sigma 50mm f/1.4 DG HSM Art: A significant step up in image quality from the f/1.8 lenses. Sharper, better bokeh, and faster autofocus. It's larger and heavier than the f/1.8 options, but the performance is worth it for many. Available for Canon, Nikon, Sony (E-mount), and L-mount.
* Pros: Excellent sharpness, beautiful bokeh, fast autofocus, solid build quality.
* Cons: Larger and heavier, more expensive.
* Sony FE 50mm f/1.8: Compact and lightweight, making it ideal for travel and everyday use. It's an affordable option for Sony full-frame mirrorless cameras. Image quality is decent, but not as impressive as the f/1.4 options.
* Pros: Compact and lightweight, affordable for Sony users.
* Cons: Image quality not as impressive as more expensive options.
3. High-End Options (For the Discerning Photographer):
* Sony FE 50mm f/1.2 GM: The top-of-the-line Sony 50mm lens. Incredibly sharp, gorgeous bokeh, and incredibly fast and accurate autofocus. It's expensive, but if you want the best image quality from a 50mm on Sony, this is it.
* Pros: Exceptional sharpness, stunning bokeh, blazing-fast autofocus, professional build quality.
* Cons: Very expensive, large and heavy.
* Canon RF 50mm f/1.2L USM: Canon's top-tier 50mm lens for their RF mount (mirrorless) cameras. Exceptional image quality, beautiful bokeh, and fast autofocus. It's expensive, but delivers professional-level performance.
* Pros: Exceptional sharpness, stunning bokeh, fast autofocus, professional build quality.
* Cons: Very expensive, large and heavy.
* Nikon NIKKOR Z 50mm f/1.2 S: The flagship 50mm lens for Nikon's Z-mount mirrorless cameras. It delivers outstanding image quality, exceptional bokeh, and fast, accurate autofocus. It's a top-tier lens for demanding photographers.
* Pros: Exceptional image quality, stunning bokeh, fast autofocus, robust build quality.
* Cons: High price, substantial size and weight.
* Sigma 50mm f/1.2 DG DN Art: This lens is available for Sony E-mount and L-mount. It strikes a good balance between exceptional image quality and a relatively manageable size and weight compared to other f/1.2 lenses. It boasts superb sharpness, beautiful bokeh, and fast, reliable autofocus.
* Pros: Excellent sharpness, beautiful bokeh, fast autofocus, robust build quality.
* Cons: Relatively expensive.
Factors to Consider When Choosing:
* Aperture: A wider aperture (smaller f-number like f/1.2 or f/1.4) allows for more light to enter the lens, resulting in shallower depth of field (more background blur) and better performance in low light. For portraits, a wider aperture is often preferred for isolating the subject. However, you'll need excellent focus accuracy at these wide apertures.
* Sharpness: Consider the lens's sharpness at different apertures. Some lenses are sharpest when stopped down a bit (e.g., f/2.8 or f/4). Look at MTF charts and read reviews to get an idea of sharpness performance.
* Bokeh: Bokeh refers to the quality of the out-of-focus areas in an image. Some lenses produce smoother, creamier bokeh than others. The number of aperture blades and the lens design affect bokeh.
* Autofocus Speed and Accuracy: Fast and accurate autofocus is essential for capturing sharp portraits, especially with shallow depth of field. Consider lenses with ultrasonic motors (USM, HSM) or stepping motors (STM). This is especially important on modern high-resolution cameras.
* Build Quality: A well-built lens will be more durable and resistant to the elements. Metal construction is generally preferred over plastic.
* Size and Weight: If you plan to carry the lens around a lot, size and weight can be important factors.
* Budget: Set a budget and stick to it. There are excellent options available at all price points.
Recommendations Based on Specific Needs:
* Best Overall (High-End, Sony): Sony FE 50mm f/1.2 GM - If you are a Sony shooter and want the best, this is it.
* Best Overall (High-End, Canon): Canon RF 50mm f/1.2L USM - For Canon RF mount, the best image quality and performance.
* Best Overall (High-End, Nikon): Nikon NIKKOR Z 50mm f/1.2 S - For Nikon Z mount, the best image quality and performance.
* Best Overall (Great balance of price and image quality): Sigma 50mm f/1.4 DG HSM Art (Canon, Nikon, Sony, L-Mount) or the newer Sigma 50mm f/1.2 DG DN Art (Sony and L-Mount)
* Best Budget Option: Yongnuo 50mm f/1.8 (for Canon, Nikon), Canon EF 50mm f/1.8 STM (Canon), Nikon AF-S NIKKOR 50mm f/1.8G (Nikon)
* Best for Travel/Everyday Use (Sony): Sony FE 50mm f/1.8 - Compact and lightweight.
Before You Buy:
* Read Reviews: Look at reviews from reputable sources (e.g., DPReview, Lensrentals, Photography Life).
* Consider Renting: If possible, rent a lens before you buy it to see if it meets your needs.
* Look at Sample Images: Search for sample images taken with the lens you're considering to get an idea of its image quality and bokeh.
Ultimately, the best 50mm lens for portraits is the one that meets *your* specific needs and budget. Good luck!