Here's a breakdown of why the 70-200mm is so popular, and the considerations for whether it's right for you:
Why the 70-200mm is Popular for Portraits:
* Compression: This is the biggest selling point. The longer focal lengths (especially 135mm and above) create a beautiful background compression effect, making the background appear closer to the subject and blurring it beautifully. This helps isolate the subject and create a flattering image.
* Working Distance: Allows you to stand further away from your subject, which can make them feel more comfortable and natural. This is especially helpful with shy or self-conscious subjects. You can capture candids without being right in their face.
* Background Blur (Bokeh): Typically, 70-200mm lenses have wide maximum apertures (f/2.8 is common), which allows for shallow depth of field and creamy, dreamy bokeh. This is highly desirable in portrait photography.
* Versatility: While ideal for headshots and upper body portraits, it can also be used for wider environmental portraits at 70mm. It's also great for event photography, weddings, and even some wildlife.
* Sharpness and Image Quality: Most 70-200mm lenses, especially the higher-end models, are known for their excellent sharpness and overall image quality.
* Zoom Range: The zoom range gives you flexibility to adjust your framing quickly without needing to physically move around as much.
Why You Might *Not* Need a 70-200mm:
* Cost: Good 70-200mm lenses are expensive. They're a significant investment.
* Size and Weight: They're large and heavy, making them less ideal for travel or long shooting sessions. Carrying it all day can be tiring.
* Space Requirements: You need space to use it effectively. In small studios or tight indoor locations, a 70-200mm can be too long.
* Other Lenses Can Achieve Similar Results:
* 85mm f/1.4 or f/1.8: A popular and more affordable alternative. Offers excellent bokeh and sharpness for portraits. Often considered a "portrait prime" lens.
* 50mm f/1.4 or f/1.8: A versatile and affordable option. Can be used for portraits, but you'll need to get closer to your subject and the background compression won't be as pronounced.
* 135mm f/2 or f/1.8: Another excellent prime lens option, offering beautiful compression and bokeh, often at a lower price than a 70-200mm.
Consider These Questions Before Buying:
* What's your budget? This is a major factor.
* What kind of portraits do you shoot? Headshots? Full-body environmental portraits? Location vs. Studio?
* How important is background blur to you?
* How much space do you typically have when shooting?
* Are you comfortable carrying a large, heavy lens?
* Do you prioritize flexibility and convenience of a zoom, or the potentially higher image quality (and often wider aperture) of a prime lens?
* Do you already own other portrait lenses? If you already have an 85mm, for example, the 70-200mm might be less essential.
Conclusion:
The 70-200mm lens is a fantastic tool for portrait photography, offering beautiful compression, background blur, and versatility. However, it's not a necessity. Many excellent portrait photographers produce stunning images with prime lenses like the 50mm, 85mm, and 135mm.
Ultimately, the best lens for you depends on your individual needs, budget, shooting style, and the type of portraits you want to create. Consider renting a 70-200mm to try it out before committing to a purchase. This will give you a real-world feel for its advantages and disadvantages in your own photography.