Here's a breakdown of the pros and cons, and factors to consider:
Arguments FOR needing a 70-200mm for portraits:
* Compression: This is the lens's biggest strength. The longer focal lengths compress the background, making it appear closer to the subject and often creating a more pleasing and flattering perspective, especially for full-body or wider portraits. It avoids the "fish-eye" distortion you can sometimes get with wider lenses at close range.
* Subject Isolation: The narrow field of view makes it easier to isolate your subject from a distracting background. This is especially useful in busy environments where you can't control the background.
* Bokeh (Background Blur): Combined with a wide aperture (like f/2.8), the 70-200mm produces beautiful, creamy bokeh, further isolating the subject.
* Working Distance: You can maintain a comfortable distance from your subject, which can help them feel more relaxed and natural. This is great for candid shots or when you want to avoid being too "in their face."
* Versatility: While primarily known for portraits, the 70-200mm can also be used for other genres like sports, wildlife, and events, making it a good investment if you shoot a variety of subjects.
* Zoom Range: The zoom range allows you to quickly adjust framing without having to physically move, which can be beneficial in dynamic situations.
Arguments AGAINST needing a 70-200mm for portraits:
* Cost: High-quality 70-200mm lenses are expensive. They are a significant investment.
* Size and Weight: They're large and heavy, which can be tiring to carry around for long periods.
* Requires More Space: Indoors, especially in smaller spaces, the 70-200mm can be impractical due to its long minimum focusing distance and the need for more space between you and your subject.
* Can Feel Isolating: The distance the lens creates can sometimes hinder connection with the subject, especially if you prefer a more intimate style.
* Alternatives Exist: You can achieve great portraits with other lenses like 35mm, 50mm, 85mm, and even some zooms in the 24-70mm range.
* Not Always Necessary for Environmental Portraits: If you want to include more of the environment in your portraits and tell a story, a wider lens might be a better choice.
Factors to consider when deciding:
* Your style of portraiture:
* Do you prefer tight headshots, full-body portraits, or something in between?
* Do you prefer a shallow depth of field with lots of bokeh or a wider depth of field to capture more of the environment?
* Do you shoot primarily in studios, outdoors, or both?
* Your budget: Can you afford a high-quality 70-200mm lens without sacrificing other essential equipment?
* Your shooting environment: Do you have enough space to use a 70-200mm comfortably?
* Your other lenses: What other lenses do you already own? Do they cover similar focal lengths?
* Your physical strength and stamina: Are you comfortable carrying a heavy lens for extended periods?
Alternatives to the 70-200mm for portrait photography:
* 85mm f/1.8 or f/1.4: A classic portrait lens. Excellent image quality, beautiful bokeh, and often more affordable than a 70-200mm. Requires moving closer to the subject.
* 50mm f/1.8 or f/1.4: Versatile and affordable. Good for environmental portraits and can be used for tighter shots as well. Requires more engagement with the subject.
* 35mm f/1.4 or f/1.8: Great for environmental portraits and storytelling. Captures a wider field of view and places the subject within the context of their surroundings.
* 135mm f/2: Offers a good balance of compression and working distance, though less versatile than a zoom. Produces exceptional bokeh.
* 24-70mm f/2.8: A versatile zoom lens that can be used for portraits as well as other genres. It lacks the reach of a 70-200mm but offers more flexibility in focal length for different situations.
Conclusion:
While a 70-200mm lens is a powerful and valuable tool for portrait photography, it's not a necessity. Consider your individual needs, shooting style, budget, and environment before making a decision. If you're serious about portrait photography and can afford it, a 70-200mm lens can be a game-changer, offering unparalleled versatility and image quality. However, don't feel pressured to buy one if it doesn't fit your needs or budget. Many talented portrait photographers create stunning images with other lenses. Try renting one before you buy to see if it fits your needs.