High-End (No Expense Spared):
* Sony FE 50mm f/1.2 GM: Arguably the best 50mm lens on the market, if you use Sony. Incredible sharpness, dreamy bokeh, fast and silent autofocus, and excellent build quality. The f/1.2 aperture creates extremely shallow depth of field. Expensive, but worth it for professional results.
* Canon RF 50mm f/1.2L USM: Similar to the Sony, but for Canon's RF mount. Unmatched sharpness, beautiful bokeh, and excellent build quality. The f/1.2 aperture provides stunning subject isolation. Also very expensive.
* Nikon Nikkor Z 50mm f/1.2 S: Nikon's entry in the ultra-fast 50mm competition. Excellent sharpness, bokeh, and build quality. The f/1.2 aperture is amazing. Premium price.
Mid-Range (Excellent Performance, More Affordable):
* Sigma 50mm f/1.4 DG HSM Art: Available for Canon, Nikon, Sony (E-mount), and L-Mount. Renowned for its sharpness and pleasing bokeh. Heavier and larger than some other options, but offers exceptional performance for the price.
* Sony FE 50mm f/1.4 GM: A step down in price and size from the f/1.2 GM, but still delivers exceptional image quality, beautiful bokeh, and fast autofocus. A great balance between performance and practicality.
* Nikon Nikkor Z 50mm f/1.8 S: A significant improvement over Nikon's older 50mm f/1.8 lenses. Sharp, relatively compact, and affordable, with good bokeh. Excellent value for Nikon Z mirrorless users.
* Canon RF 50mm f/1.8 STM: A very compact and affordable lens for Canon RF mount users. Offers excellent image quality for the price, with a decent bokeh. It's a great option for beginners.
Budget-Friendly (Great Value for the Money):
* Canon EF 50mm f/1.8 STM: (For Canon DSLRs - requires an adapter for Canon mirrorless). Often called the "nifty fifty." Inexpensive, lightweight, and produces surprisingly sharp images. The bokeh is decent, though not as smooth as the more expensive lenses. A fantastic starting point.
* Nikon Nikkor 50mm f/1.8G: (For Nikon DSLRs - requires an adapter for Nikon mirrorless). Similar to the Canon 50mm f/1.8, this lens offers excellent value. Sharp images and good bokeh for the price.
* Yongnuo 50mm f/1.8 (Various Mounts): The cheapest option, but image quality can be inconsistent. It *can* produce good results, but you're trading reliability and build quality for a lower price. Can be a fun option to play with if you're on a very tight budget.
Key Considerations for Portrait Lenses:
* Aperture: A wider aperture (e.g., f/1.2, f/1.4, f/1.8) creates a shallower depth of field, blurring the background and isolating your subject. This is ideal for portraits.
* Sharpness: Sharpness is important, but not *everything*. A lens that's *too* sharp can accentuate blemishes. Look for a lens that's sharp in the center, but maybe slightly softer on the edges.
* Bokeh: Bokeh refers to the quality of the out-of-focus areas. Smooth, creamy bokeh is generally preferred for portraits. The number of aperture blades and lens design contribute to bokeh quality.
* Autofocus: Fast and accurate autofocus is essential, especially if you're photographing moving subjects.
* Build Quality: A well-built lens will last longer and be more enjoyable to use.
* Price: Set a budget and find the best lens that fits within it.
Recommendation Breakdown (General):
* Best Overall (Money No Object): Sony FE 50mm f/1.2 GM (for Sony E-mount) / Canon RF 50mm f/1.2L USM (for Canon RF mount) / Nikon Nikkor Z 50mm f/1.2 S (for Nikon Z mount)
* Best Value (Excellent Performance at a Reasonable Price): Sigma 50mm f/1.4 DG HSM Art (various mounts)
* Best Budget Option: Canon EF 50mm f/1.8 STM (with adapter if needed) / Nikon Nikkor 50mm f/1.8G (with adapter if needed)
To give you a more specific recommendation, I need to know:
1. What camera system do you use (e.g., Canon, Nikon, Sony, Fujifilm, Micro Four Thirds)?
2. What is your budget?
3. What kind of portraits do you plan to shoot (e.g., headshots, full body, indoor, outdoor, studio)?
Once I have this information, I can give you a more tailored recommendation.