Here's a breakdown of why and why not, along with considerations:
Arguments FOR a 70-200mm Lens for Portrait Photography:
* Compression: This is the biggest selling point. At longer focal lengths, the background appears closer and more compressed. This creates a visually pleasing separation between the subject and the background, making the subject pop and minimizing distractions. This effect is especially noticeable with a 70-200mm compared to wider lenses.
* Bokeh: 70-200mm lenses often have wide apertures (f/2.8, f/4) which, combined with the longer focal length, results in beautiful, creamy background blur (bokeh). This further isolates the subject and enhances the artistic feel of the portrait.
* Reach: Allows you to work from a comfortable distance, especially important for shy or self-conscious subjects. You can capture natural expressions without being intrusive. This is also helpful in crowded locations, allowing you to isolate your subject.
* Versatility: While primarily thought of for portraits, a 70-200mm is useful for a variety of subjects like landscapes, events, sports, and wildlife, making it a versatile lens to have in your kit. You can even shoot details or environmental portraits with this lens.
* Flattering Perspective: Longer focal lengths generally provide a more flattering perspective for portraits, avoiding distortion and creating a more pleasing rendition of facial features.
Arguments AGAINST a 70-200mm Lens for Portrait Photography:
* Cost: 70-200mm lenses, especially those with a constant f/2.8 aperture, are often quite expensive. This can be a significant barrier to entry for beginner photographers.
* Size and Weight: These lenses are bulky and heavy, which can be tiring to carry around for extended periods. They may also require a larger camera bag.
* Space Requirements: You need a good amount of space to work effectively with a 70-200mm, especially at the longer end. Small studios or cramped locations can be challenging. You'll often need to step back quite a bit, which may not always be possible.
* Not Always Necessary: Excellent portraits can be taken with a variety of lenses, including 35mm, 50mm, and 85mm primes. The "best" lens depends on the desired aesthetic and the shooting environment.
* Reliance on Bokeh (Overuse): Sometimes, photographers overuse the shallow depth of field and bokeh created by a 70-200mm to compensate for a lack of creativity or interesting composition. A great portrait is more than just a blurry background.
Alternatives and Considerations:
* 85mm Prime Lens: Many portrait photographers swear by an 85mm prime lens. It offers a good balance of compression, bokeh, and manageable size/weight. It's generally more affordable than a 70-200mm.
* 50mm Prime Lens: A versatile and affordable option, especially for environmental portraits or when working in tight spaces. It's also good for full body shots when you need some context.
* Zoom Lenses in Other Ranges (24-70mm, 24-105mm): These can be more versatile for general photography and still provide a good range for portraits, although they won't have the same level of compression or bokeh as a 70-200mm.
* The Type of Portraits You Shoot: Consider the style of portraits you want to create. If you primarily shoot headshots or close-up portraits with a blurred background, a 70-200mm is a strong contender. If you prefer environmental portraits or full-body shots with more background context, a wider lens might be a better choice.
* Your Shooting Style: Do you prefer to direct your subjects closely, or do you prefer to observe and capture candid moments from a distance?
* Budget: A crucial factor. Don't break the bank on a 70-200mm if it stretches your budget too thin. There are many other great lenses that can produce excellent results.
* Used Options: Consider buying a used 70-200mm to save money.
In conclusion:
A 70-200mm lens is a fantastic tool for portrait photography, offering compression, beautiful bokeh, and the ability to work from a comfortable distance. However, it's not strictly *necessary*. Consider your budget, shooting style, the type of portraits you want to create, and the space you have available. An 85mm prime lens is often cited as a great alternative, and wider lenses can also be used effectively for portraiture. Ultimately, the "best" lens is the one that helps you achieve your artistic vision.