Here's a breakdown of why a 70-200mm is popular, its alternatives, and factors to consider:
Why the 70-200mm is a Favorite for Portrait Photographers:
* Excellent Focal Length Range for Portraits: This range allows for flattering compression (making features appear closer together) and separation from the background. 85mm is often considered the sweet spot for headshots, and the 70-200mm easily covers that and provides more flexibility.
* Subject Isolation and Background Blur (Bokeh): Especially with a fast aperture (f/2.8), it creates beautiful, creamy bokeh that isolates your subject and removes distractions.
* Working Distance: It allows you to keep a comfortable distance from your subject, making them feel less pressured and allowing for more candid moments. You're not right in their face.
* Versatility: While primarily used for portraits, it can also be used for sports, events, and even some landscape photography.
* Sharpness and Image Quality: Typically, 70-200mm lenses are known for their excellent sharpness and overall image quality. Many professional-grade versions are meticulously crafted.
* Professional Look: Using a larger lens, especially a white 70-200mm, gives a professional impression to clients. (This is superficial, but it does contribute to perceived value.)
Why You *Might Not* Need a 70-200mm:
* Price: 70-200mm lenses, especially those with a fast aperture (f/2.8), are expensive.
* Size and Weight: They're bulky and heavy, which can be tiring for long shoots.
* Not Ideal for Tight Spaces: If you primarily shoot in small studios or indoor locations, the long focal length can be limiting. You might not have enough room to back up.
* Alternative Lenses Can Achieve Similar Results (Often More Affordably):
Alternatives to the 70-200mm:
* 85mm Prime Lens: This is often considered the classic portrait lens. It's typically more affordable than a 70-200mm f/2.8, provides excellent sharpness, and delivers beautiful bokeh. The downside is that it's only one focal length.
* 50mm Prime Lens: A versatile and affordable lens that can be used for portraits, especially environmental portraits. Requires you to get closer to your subject, and less compression than longer lenses.
* 35mm Prime Lens: Great for environmental portraits and capturing a wider scene. Requires a different approach to posing and composition.
* Zoom Lenses with Similar Ranges: Some kit lenses or mid-range zoom lenses (e.g., 55-200mm, 55-250mm) can provide similar focal length options but typically have slower apertures and may not be as sharp.
* 135mm Prime Lens: A lesser-known but highly regarded portrait lens that offers excellent compression and background blur.
Factors to Consider When Deciding:
* Your Budget: How much are you willing to spend on a lens?
* Your Shooting Style: Do you prefer working close to your subjects or maintaining distance?
* Your Typical Shooting Environment: Do you shoot primarily in studios, outdoors, or on location?
* Your Client Needs: Do your clients expect a specific look or style that a 70-200mm would help achieve?
* Your Physical Limitations: Can you comfortably carry a heavy lens for extended periods?
* Your Current Lens Collection: Do you already own a lens that can cover some of the focal lengths offered by a 70-200mm?
* Desired Bokeh and Subject Isolation: How important are these elements to your photography style?
In Conclusion:
A 70-200mm lens is a fantastic tool for portrait photography, offering a winning combination of focal length, image quality, and background blur. However, it's not a mandatory purchase. Evaluate your needs, budget, and shooting style to determine if it's the right investment for you. Consider alternatives like 85mm or 135mm prime lenses, which can provide excellent results at a lower cost. Ultimately, the best lens is the one that helps you achieve your creative vision and deliver the results your clients expect.