High-End (Best Image Quality & Features - Often >$1000 USD):
* Sigma 50mm f/1.4 DG HSM Art (Most Systems): Widely considered a top performer. Razor sharp, excellent bokeh, and well-corrected for aberrations. It's relatively large and heavy, but the image quality is worth it for many. Known for its amazing sharpness, smooth background blur and fantastic color rendition.
* Sony FE 50mm f/1.2 GM (Sony E-mount): The king of the hill in terms of shallow depth of field and bokeh. Superb sharpness, even wide open. Expensive but offers unparalleled performance for Sony users. The autofocus is incredibly fast and accurate.
* Canon RF 50mm f/1.2L USM (Canon RF-mount): Another f/1.2 option offering stunningly shallow depth of field and beautiful bokeh. Excellent sharpness and color rendition. Premium price, but delivers professional-grade results.
* Nikon NIKKOR Z 50mm f/1.2 S (Nikon Z-mount): Delivers incredible detail and clarity with outstanding bokeh. Fast and accurate autofocus motor. Very expensive.
Mid-Range (Excellent Performance & Value - Roughly $500-$1000 USD):
* Sony FE 55mm f/1.8 ZA (Sony E-mount): While technically a 55mm, it's often grouped with 50mm lenses. A compact and lightweight option with excellent sharpness and good bokeh. A favorite among Sony users for its portability and image quality.
* Canon EF 50mm f/1.4 USM (Canon EF-mount): A solid performer with good sharpness and smooth bokeh. Offers a wider aperture than the f/1.8 version. Known for being a great value.
* Nikon AF-S NIKKOR 50mm f/1.4G (Nikon F-mount): Sharp and reliable. Produces nice bokeh. Another popular lens for its balance of performance and price.
* Zeiss Planar T* 50mm f/1.4 ZA (Sony E-mount): A classic lens design known for its smooth bokeh and beautiful rendering. Offers a slightly different aesthetic than some of the more modern options.
Budget-Friendly (Great for Starting Out - Under $300 USD):
* Canon EF 50mm f/1.8 STM (Canon EF-mount): A fantastic entry-level lens. Sharp, lightweight, and affordable. A must-have for Canon shooters on a budget. It has a plastic build, but the image quality is surprisingly good.
* Nikon AF-S NIKKOR 50mm f/1.8G (Nikon F-mount): Similar to the Canon f/1.8, this is a great budget-friendly option for Nikon users. Sharp, lightweight, and provides pleasing bokeh.
* Yongnuo 50mm f/1.8 (Various Mounts): Very inexpensive, but image quality can be variable. A good option if you want to experiment with a 50mm lens without spending a lot of money. Check reviews carefully.
* Sony FE 50mm f/1.8 (Sony E-mount): A budget-friendly option for Sony users. Decent sharpness, although not as good as the 55mm f/1.8 ZA.
Key Considerations When Choosing:
* Aperture: A wider aperture (e.g., f/1.2, f/1.4, f/1.8) allows for shallower depth of field, creating a blurred background ("bokeh") that isolates your subject. It also performs better in low light.
* Sharpness: Important for capturing fine details in your portraits. Check reviews to see how sharp a lens is, especially at wider apertures.
* Bokeh: The quality of the out-of-focus areas. Some lenses produce smoother, creamier bokeh than others. Look for words like "smooth," "creamy," or "pleasing" when reading reviews.
* Autofocus Speed and Accuracy: Critical for capturing sharp images, especially when shooting moving subjects. Ultrasonic motors (USM), Stepping Motors (STM), and other advanced autofocus systems provide faster and more accurate focusing.
* Build Quality: A well-built lens will be more durable and last longer. Consider the materials used (e.g., metal vs. plastic) and the overall construction.
* Size and Weight: If you plan to carry your lens around a lot, size and weight can be important factors.
* Lens Mount: Make sure the lens is compatible with your camera's lens mount (e.g., Canon EF, Canon RF, Nikon F, Nikon Z, Sony E).
* Image Stabilization: Image stabilization helps reduce camera shake, which is especially useful in low light or when shooting handheld. However, 50mm lenses are often used at faster shutter speeds, making IS less critical than for longer focal lengths. Many cameras also have in-body image stabilization (IBIS), which makes this less of a concern.
* Price: Set a budget and find the best lens that fits within your price range.
Recommendations Based on Common Scenarios:
* Best Overall (High Budget): Sigma 50mm f/1.4 DG HSM Art (for most systems), Sony FE 50mm f/1.2 GM (for Sony), Canon RF 50mm f/1.2L USM (for Canon RF).
* Best Value (Mid-Range): Sony FE 55mm f/1.8 ZA (for Sony), Canon EF 50mm f/1.4 USM (for Canon EF).
* Best Budget Option: Canon EF 50mm f/1.8 STM (for Canon EF), Nikon AF-S NIKKOR 50mm f/1.8G (for Nikon F).
* For the Absolute Best Bokeh: Sony FE 50mm f/1.2 GM (Sony), Canon RF 50mm f/1.2L USM (Canon RF), Nikon NIKKOR Z 50mm f/1.2 S (Nikon Z).
Before you buy:
* Read reviews: Check out reputable photography websites and forums for in-depth reviews of different lenses.
* Look at sample images: See how the lens performs in real-world shooting conditions.
* Consider renting: Rent a lens before you buy it to see if it meets your needs and preferences.
Ultimately, the best 50mm lens for portraits is the one that best suits your individual needs and budget. Consider the factors I've outlined above and do your research to find the perfect lens for you. Good luck!