Let's break down the arguments for and against needing a 70-200mm lens for portrait photography:
Arguments FOR a 70-200mm for Portrait Photography:
* Compression: The longer focal lengths of a 70-200mm lens create beautiful compression, which makes backgrounds appear closer to the subject. This can isolate the subject and minimize distracting elements. It also tends to flatter facial features.
* Background Blur (Bokeh): The 70-200mm lenses, especially with wider apertures (f/2.8 is common and desirable), excel at creating creamy, dreamy background blur (bokeh). This further isolates the subject and adds a professional look to portraits.
* Working Distance: The longer reach allows you to work at a comfortable distance from your subject. This can be beneficial for shy or self-conscious subjects, and allows you to capture more natural expressions without being "in their face." You can also photograph people in more public places without disturbing them as much.
* Versatility (Somewhat): While primarily a portrait lens, a 70-200mm can be used for other types of photography, such as events, sports, or even landscapes (compressing the landscape).
* Full-Body Portraits: Excellent for full-body shots without distorting proportions.
* Professional Perception: It can give the *impression* of being a serious photographer to clients.
Arguments AGAINST a 70-200mm for Portrait Photography:
* Cost: High-quality 70-200mm lenses, especially those with a constant f/2.8 aperture, are expensive. This is a significant investment.
* Size and Weight: These lenses are large and heavy, making them less portable and potentially tiring to use for extended shoots.
* Space Requirements: You need space to use a 70-200mm lens effectively. Shooting indoors or in tight locations can be challenging or impossible. You need room to back up.
* Not Ideal for All Portrait Styles: If you prefer environmental portraits or close-up, intimate portraits, a wider focal length lens (e.g., 35mm, 50mm, 85mm) might be a better choice.
* Alternative Options Exist: There are other excellent portrait lenses that can achieve similar results, such as an 85mm f/1.4 or f/1.8, which are often more affordable and compact.
* Can Be Isolating: The distance created can be a barrier to building rapport with your subject. You need to be skilled at communicating effectively from a distance.
* Over-Reliance on Bokeh: It can be tempting to overuse background blur, sacrificing context and storytelling in your portraits.
Alternatives to a 70-200mm:
* 85mm f/1.4 or f/1.8: A classic portrait lens. Excellent sharpness, background blur, and a more manageable size and price than a 70-200mm. A very popular and often recommended alternative.
* 50mm f/1.4 or f/1.8: A versatile and affordable "nifty fifty" lens. Great for environmental portraits and can still create decent background blur.
* 35mm f/1.4 or f/1.8: Ideal for environmental portraits and capturing more of the scene. Requires getting closer to your subject.
* Zoom Lenses (e.g., 24-70mm): Offers versatility but may not have the same level of compression or background blur as a 70-200mm or prime lens.
* 135mm f/2: Another fantastic portrait lens that balances reach and compression well. Can be more expensive and harder to find than an 85mm.
Who *Needs* a 70-200mm?
* Photographers who frequently shoot full-body portraits outdoors: The compression and working distance are invaluable.
* Photographers who want to maximize background blur: If you're chasing that super creamy bokeh look.
* Photographers who shoot in environments where they can't get close to their subjects: Events, crowded locations, etc.
* Photographers who are specializing in a particular portrait style where the 70-200mm look is essential.
Who *Doesn't* Need a 70-200mm?
* Photographers on a tight budget: There are better ways to spend your money when starting out.
* Photographers who primarily shoot indoors or in small spaces: It's simply not practical.
* Photographers who prefer environmental portraits: Wider focal lengths are more suitable.
* Photographers who are just starting out in portraiture: Learn the basics with a more versatile and affordable lens first.
* Photographers who don't like carrying heavy gear.
In Conclusion:
A 70-200mm lens is a fantastic tool for portrait photography, but it's not essential for *everyone*. Carefully consider your shooting style, budget, space constraints, and desired results before making a purchase. An 85mm or even a 50mm lens can often be a better and more practical starting point. Renting a 70-200mm before buying is *highly* recommended to see if it truly fits your needs. Ultimately, the best lens is the one that helps you achieve your creative vision.