Here's a breakdown of why a 70-200mm lens is *often* considered a staple for portrait photography, and when it might be less crucial:
Reasons Why a 70-200mm Lens is Highly Recommended for Portrait Photographers:
* Compression: The 70-200mm range is known for its flattering compression, which makes subjects appear more naturally proportioned. It avoids distortion that wider lenses can create on faces, particularly noses.
* Background Blur (Bokeh): Especially at longer focal lengths and wider apertures (like f/2.8), a 70-200mm lens produces a beautifully blurred background, isolating the subject and creating a professional look. This is great for minimizing distracting elements.
* Versatility: The zoom range offers flexibility. You can quickly switch from a wider shot showing more environment to a tighter headshot without moving your position significantly.
* Working Distance: It allows you to maintain a comfortable distance from your subject, which can be less intimidating than being close with a wider lens. This is especially important when photographing children or people who might be camera-shy.
* Zooming for Different Effects: You can use the zoom range to subtly change the perspective and composition without physically moving. For example, zooming slightly tighter on the face can eliminate distracting elements from the edges of the frame.
* Available Light Performance (Especially f/2.8): The f/2.8 versions of these lenses are highly regarded for their low-light capabilities. They let in a lot of light, enabling faster shutter speeds and lower ISOs in challenging lighting conditions.
* Subject Isolation: The combination of compression and shallow depth of field effectively isolates the subject, making them stand out in the image.
When a 70-200mm Lens Might Not Be *Essential*:
* Studio Portraiture with Controlled Environment: In a well-lit studio where you have complete control over the background and your distance from the subject, other lenses can work just as well.
* Environmental Portraiture Emphasizing Context: If your goal is to show the subject in their environment and tell a story about their surroundings, a wider lens (like a 35mm or 50mm) might be a better choice.
* Budget Constraints: 70-200mm lenses, particularly the f/2.8 versions, can be expensive. If you're just starting out, there are more affordable prime lenses that can produce excellent portraits.
* Limited Space: In small studios or confined spaces, a 70-200mm lens might be too long to be practical.
* Documentary Style Portraits: If you prefer a more natural and unposed look, you might prefer lenses that allow you to be closer to your subject and interact more easily.
* Prime Lens Preference: Some photographers prefer the sharpness, speed, and image quality of prime lenses (like an 85mm or 135mm) and are willing to sacrifice the versatility of a zoom. Primes are typically smaller, lighter, and sharper for the price.
Alternatives to a 70-200mm Lens:
* 85mm Prime Lens: Often considered the "portrait king," an 85mm offers beautiful bokeh, flattering compression, and is usually more affordable and lighter than a 70-200mm.
* 135mm Prime Lens: A longer focal length with even more compression and background blur. It requires more working distance.
* 50mm Prime Lens: A versatile and affordable option that can be used for a wider range of portrait styles, especially environmental portraits.
* Other Zoom Lenses: There are other zoom lenses that can cover a similar focal length range, but may not have the same image quality or maximum aperture as a 70-200mm. For instance, a 24-70mm lens might work, but won't have the reach or the same level of background blur.
In Conclusion:
While not strictly *necessary*, a 70-200mm lens is a highly valuable and versatile tool for portrait photographers, offering a range of benefits that can significantly enhance the quality and impact of their work. The key is to understand your own photographic style, the type of portraits you want to create, and your budget, and then choose the lens that best suits your needs. If you are serious about portraiture, particularly in capturing headshots, upper body shots or full body images with a beautiful blurry background, then you will not be disappointed with the results from a 70-200mm lens. If on a budget, start with an 85mm prime.