For General Use and Affordability:
* Canon EF 50mm f/1.8 STM (Canon DSLRs):
* Pros: Incredibly affordable, compact, lightweight, decent image quality, smooth STM autofocus.
* Cons: Plastic build, can exhibit some vignetting and chromatic aberration, bokeh isn't the smoothest compared to pricier options.
* Why it's good for portraits: An excellent entry-level option. The f/1.8 aperture allows for good subject isolation and low-light shooting.
* Nikon AF-S NIKKOR 50mm f/1.8G (Nikon DSLRs):
* Pros: Affordable, good image quality, fast and accurate autofocus, lightweight.
* Cons: Similar build quality and optical imperfections to the Canon f/1.8.
* Why it's good for portraits: A reliable and affordable choice for Nikon users, offering similar benefits to the Canon counterpart.
* Sony FE 50mm f/1.8 (Sony Mirrorless):
* Pros: Affordable, compact, decent image quality, good for getting started with full-frame Sony.
* Cons: Autofocus can be a bit noisy and slow compared to more expensive Sony lenses.
* Why it's good for portraits: A budget-friendly way to experience the benefits of a 50mm lens on Sony's mirrorless system.
* Fujifilm XF 50mm f/2 R WR (Fujifilm Mirrorless):
* Pros: Compact, weather-resistant, sharp, fast and accurate autofocus, pleasing bokeh.
* Cons: Not as wide an aperture as f/1.8 or f/1.4 options.
* Why it's good for portraits: A great all-around lens for Fujifilm cameras, offering a balance of image quality, portability, and weather resistance. The 50mm (75mm equivalent on APS-C) is an excellent focal length for tighter portraits.
For Improved Image Quality and Bokeh:
* Sigma 50mm f/1.4 DG HSM Art (Available for Canon, Nikon, Sony E, Leica L, and Sigma SA Mounts):
* Pros: Exceptionally sharp, beautiful bokeh, solid build quality, fast and accurate autofocus.
* Cons: Larger and heavier than f/1.8 lenses, can exhibit some chromatic aberration at wide apertures.
* Why it's good for portraits: This is a highly regarded lens for its sharpness and creamy bokeh. It's a step up in image quality and a popular choice for serious portrait photographers.
* Sony FE 50mm f/1.4 GM (Sony Mirrorless):
* Pros: Extremely sharp, beautiful bokeh, fast and quiet autofocus, excellent build quality.
* Cons: Expensive, large and heavy.
* Why it's good for portraits: A top-of-the-line 50mm lens designed for Sony's mirrorless system. It delivers exceptional image quality and performance, making it a favorite among professionals.
* Nikon NIKKOR Z 50mm f/1.8 S (Nikon Z Mirrorless):
* Pros: Very sharp, good bokeh, fast and quiet autofocus, excellent build quality.
* Cons: More expensive than the f/1.8G DSLR version, but a significant upgrade.
* Why it's good for portraits: Designed specifically for Nikon's Z mirrorless system, this lens offers improved sharpness, autofocus, and overall performance compared to its DSLR counterpart.
* Canon RF 50mm f/1.8 STM (Canon Mirrorless):
* Pros: Compact and lightweight, affordable, improved image quality over the EF version, excellent value for money.
* Cons: While improved over the EF version, still has some limitations compared to higher-end 50mm lenses.
* Why it's good for portraits: A great entry-level 50mm option for Canon's RF mount mirrorless cameras. Offers a good balance of price and performance.
For Ultimate Bokeh and Low-Light Performance:
* Canon EF 50mm f/1.2L USM (Canon DSLRs):
* Pros: Extremely shallow depth of field, creamy bokeh, excellent low-light performance, professional build quality.
* Cons: Expensive, soft at f/1.2 (sharper when stopped down), autofocus can be slower than newer lenses.
* Why it's good for portraits: The ultimate bokeh machine for Canon DSLRs. The f/1.2 aperture allows for incredibly shallow depth of field and stunning subject isolation.
* Nikon NIKKOR 50mm f/1.2 (Nikon Z Mount):
* Pros: Similar to the Canon f/1.2L but designed for Nikon's mirrorless system, potentially sharper wide open than the Canon.
* Cons: Expensive, similar drawbacks to the Canon in terms of weight and potentially slow autofocus.
* Why it's good for portraits: Provides stunning bokeh and exceptional low-light capabilities on Nikon's Z mirrorless cameras.
* Voigtlander 50mm f/1.2 Nokton Aspherical (Available for Nikon Z, Sony E, and Canon RF):
* Pros: Incredible bokeh, sharp, well-built, and known for its pleasing rendering and character.
* Cons: Manual Focus only, can be a learning curve for those used to autofocus.
* Why it's good for portraits: For those who enjoy manual focus and want a lens with beautiful character, this lens provides unique results.
Key Considerations When Choosing:
* Budget: The price range for 50mm lenses is vast. Start with what you can comfortably afford and upgrade later if needed.
* Camera System: Ensure the lens is compatible with your camera's mount.
* Aperture: A wider aperture (smaller f-number) allows for shallower depth of field and better low-light performance. f/1.8 is a good starting point, while f/1.4 and f/1.2 offer even more dramatic bokeh.
* Autofocus: Consider autofocus speed and accuracy, especially if you're photographing moving subjects.
* Sharpness: While important, sharpness isn't everything for portraits. Bokeh and rendering are also crucial.
* Build Quality: A well-built lens will last longer and feel more comfortable to use.
* Size and Weight: If you plan to carry your lens around a lot, consider its size and weight.
In summary:
* Best Budget Option: Canon EF 50mm f/1.8 STM, Nikon AF-S NIKKOR 50mm f/1.8G, Sony FE 50mm f/1.8.
* Best Balance of Quality and Price: Sigma 50mm f/1.4 DG HSM Art, Nikon Z 50mm f/1.8 S.
* Best Overall Image Quality (High-End): Sony FE 50mm f/1.4 GM.
* Ultimate Bokeh: Canon EF 50mm f/1.2L USM, Nikon NIKKOR 50mm f/1.2 S.
* Unique Character (Manual Focus): Voigtlander 50mm f/1.2 Nokton Aspherical.
Before making a decision, I highly recommend reading reviews and comparing sample images from different lenses to see which one best suits your needs and aesthetic preferences. Good luck!