Here's a breakdown of the arguments for and against, and what to consider:
Arguments FOR needing a 70-200mm lens for portrait photography:
* Compression: This is the big one. The longer focal lengths offered by a 70-200mm compress the background, making it appear closer to the subject. This creates a more intimate and focused look, isolating the subject from potentially distracting elements. It also tends to flatter facial features.
* Working Distance: You can maintain a comfortable distance from your subject, which can be crucial for candid shots or when working with shy or self-conscious individuals. It also allows you to work in environments where you can't physically get closer to your subject (e.g., shooting across a room).
* Beautiful Bokeh: Most 70-200mm lenses, especially those with a wide aperture (f/2.8 being the most common and desirable for portraits), produce creamy, blurred backgrounds (bokeh) that help to isolate the subject and create a visually appealing image.
* Versatility: The zoom range makes it adaptable for various portrait styles, from tight headshots to environmental portraits. You can quickly adjust your framing without moving your feet.
* Professional Look: The results you can achieve with a good 70-200mm lens often have a certain polished, professional quality.
* Telephoto Reach: Useful for shooting children, pets, or other moving subjects from a distance. Also helpful for wildlife portraits.
* Image Quality: High-end 70-200mm lenses are often designed with excellent optics, resulting in sharp images with good contrast and minimal distortion.
Arguments AGAINST needing a 70-200mm lens for portrait photography:
* Cost: High-quality 70-200mm lenses are expensive. This can be a significant barrier to entry.
* Size and Weight: They are bulky and heavy, making them less convenient for travel or long shooting sessions. This can lead to fatigue.
* Can be intimidating: Some subjects can feel intimidated by a large lens pointed at them.
* Not ideal for tight spaces: Useless indoors when you need to shoot in a small room.
* Alternatives exist: Other lenses, like 35mm, 50mm, 85mm, and 135mm primes, can produce excellent portrait results and often offer wider maximum apertures for even shallower depth of field.
* Technique over Gear: A skilled photographer can create beautiful portraits with any lens. Composition, lighting, and posing are often more important than the specific focal length.
What to Consider When Deciding:
* Your Portrait Style: Do you prefer tight headshots, full-body environmental portraits, candid shots, or something in between? The 70-200mm excels at tight to medium portraits, but might be less suitable for wide, environmental shots.
* Your Budget: Can you afford a high-quality 70-200mm lens without sacrificing other essential gear?
* Your Shooting Environment: Do you primarily shoot in studios, outdoors, or both? A 70-200mm is more versatile outdoors but can be limiting in small studios.
* Your Physical Limitations: Can you comfortably carry and use a heavy lens for extended periods?
* Your Existing Lens Collection: Do you already have lenses that cover some of the focal lengths within the 70-200mm range?
* Do you like the compressed look? Some photographers prefer the look of wider lenses and don't want the compression.
* Do you need versatility? If you need a lens that can handle various shooting situations, including sports or wildlife in addition to portraits, a 70-200mm could be a good investment.
Alternatives to the 70-200mm:
* 85mm Prime: A classic portrait lens known for its flattering focal length, sharpness, and beautiful bokeh. Often more affordable and lighter than a 70-200mm.
* 135mm Prime: Offers even more compression and bokeh than an 85mm, but requires more distance from the subject.
* 50mm Prime: A versatile lens that can be used for portraits, but requires more careful composition and control of the background. Very affordable.
* 35mm Prime: Useful for environmental portraits and capturing a wider field of view.
* Mid-Range Zoom (e.g., 24-70mm or 24-105mm): Can be a decent compromise if you need a versatile lens for various types of photography, including portraits.
Conclusion:
A 70-200mm lens is a powerful and versatile tool for portrait photography, offering compression, beautiful bokeh, and comfortable working distance. However, it's not an absolute necessity. Carefully consider your shooting style, budget, and physical limitations before making a purchase. Explore alternative lenses and consider renting a 70-200mm to try it out before committing. Ultimately, the best lens for you is the one that helps you create the images you envision. Good technique and creative vision are far more important than any single piece of equipment.