Here's a breakdown to help understand why and whether it's right for you:
Arguments for needing a 70-200mm lens for portrait photography:
* Compression: This is the big one. The longer focal length compresses the perspective, making subjects look more flattering and less distorted. It minimizes features that might be emphasized with wider lenses. This compression also makes backgrounds appear closer and more blurred, isolating the subject.
* Subject Isolation: The narrow field of view allows you to isolate your subject even in busy environments. It's easier to create a shallow depth of field (bokeh) to blur out distractions.
* Working Distance: It allows you to stand further away from your subject, which can make them feel more comfortable, especially with shy or self-conscious individuals. It also provides space to compose shots without feeling cramped.
* Versatility: It's not just a portrait lens. You can use it for events, wildlife (though not ideal without a longer lens), and even some landscape photography.
* Zoom Capability: Having the zoom range allows you to quickly adjust your composition without having to physically move, which can be important in fast-paced situations.
* High Quality Options: Many 70-200mm lenses are built with professional-grade optics, resulting in sharp images and excellent image quality. Many include image stabilization, which is invaluable in low light or when shooting handheld.
Arguments against needing a 70-200mm lens for portrait photography:
* Cost: 70-200mm lenses, especially those with a fast aperture (f/2.8), are expensive. A good quality used one can be more affordable, but it's still a significant investment.
* Size and Weight: They are large and heavy, which can be tiring to carry around for extended periods. This might be a deterrent for some photographers.
* Space Requirements: You need space to use it effectively. In small studios or cramped locations, a 70-200mm can be impractical.
* Overlapping Focal Lengths: You might already have other lenses that cover similar focal lengths, such as a 24-70mm or 24-105mm, which could be sufficient for your needs.
* Alternatives Exist: Prime lenses like an 85mm or 135mm can offer comparable results in terms of compression and subject isolation, often with even better image quality and wider apertures at a lower price point (though without the versatility of the zoom).
When a 70-200mm lens might *not* be the best choice:
* Tight spaces: If you primarily shoot in small studios or homes, the working distance may be too great.
* Budget constraints: There are other excellent portrait lenses that are more affordable.
* You prefer prime lenses: Some photographers simply prefer the image quality and characteristics of prime lenses, and are willing to forgo the zoom capability.
* You primarily shoot environmental portraits: Wider lenses are often better suited for capturing the subject within their environment.
Alternatives to the 70-200mm lens for portraits:
* 85mm Prime: A classic portrait lens known for its beautiful bokeh and flattering perspective. Often more affordable than a 70-200mm f/2.8.
* 50mm Prime: A versatile lens that can be used for portraits, but may require getting closer to the subject. Very affordable.
* 35mm Prime: Can be used for environmental portraits or wider shots, but may not be as flattering for close-ups.
* 135mm Prime: Offers even greater compression and subject isolation than an 85mm, but requires more working distance.
* 24-70mm Zoom: A versatile zoom lens that can cover a range of focal lengths suitable for portraits, though it won't have the same compression as a 70-200mm.
Conclusion:
The 70-200mm is a fantastic lens for portrait photography, offering compression, subject isolation, and versatility. However, it's not a mandatory purchase. Your specific needs and shooting style will determine whether it's the right lens for *you*.
Consider these questions before buying:
* What type of portraits do you shoot? (Headshots, full-body, environmental, etc.)
* Where do you primarily shoot? (Studio, outdoors, etc.)
* What is your budget?
* Do you prefer zoom lenses or prime lenses?
* Do you mind carrying a heavier lens?
* What lenses do you already own?
By carefully considering these factors, you can make an informed decision about whether a 70-200mm lens is a worthwhile investment for your portrait photography. Try renting one before you buy to see if you enjoy working with it. Good luck!