It depends on several factors, including:
* Your Style: Do you prefer tight headshots, environmental portraits, or something in between?
* Your Budget: Are you willing to invest in a high-quality lens, or are there more pressing needs for your business?
* Your Shooting Environment: Do you work primarily in studios, outdoors, or a mix?
* Your Personal Preferences: Some photographers simply prefer the look and feel of certain lenses.
* Other Lenses You Own: A 70-200mm might be less crucial if you already have a versatile prime lens lineup covering similar focal lengths.
Here's a breakdown of the arguments for and against a 70-200mm lens for portrait photography:
Arguments FOR a 70-200mm Lens:
* Compression: This is the biggest selling point. The longer focal length compresses perspective, making features appear more flattering and minimizing distortion. It also blurs the background beautifully.
* Subject Isolation: The shallow depth of field you can achieve at 200mm (especially with a fast aperture like f/2.8) helps to isolate your subject and draw the viewer's eye to them.
* Working Distance: Allows you to maintain a comfortable distance from your subject, which can make them feel more relaxed and natural. You can capture candid moments without being intrusive.
* Versatility: While primarily known for portraits, the 70-200mm is also great for events, sports, and even some landscapes.
* Image Quality: High-quality 70-200mm lenses often deliver exceptional sharpness, contrast, and color rendition.
* Background Blur (Bokeh): Creates a beautiful and creamy background blur, especially with fast aperture versions (f/2.8). This really helps to isolate the subject.
* Easier to Focus: Longer lenses can sometimes make focusing on the eye easier than with wider lenses.
Arguments AGAINST a 70-200mm Lens:
* Cost: 70-200mm lenses, especially those with a fast aperture (f/2.8), are often expensive.
* Size and Weight: They can be bulky and heavy, which can be tiring to carry around for extended shoots. This can also make them less discreet for candid shots.
* Space Requirements: You need a decent amount of space to use this lens effectively, especially at the longer end. It might not be ideal for small studios or indoor shoots.
* Alternatives Exist: Prime lenses like 85mm, 105mm, and 135mm can offer similar (or even better) image quality and shallow depth of field in a smaller and sometimes more affordable package.
* May Encourage Laziness: While a longer zoom allows for more distance, it can also lead to less engagement with the subject. Moving closer and communicating can sometimes create better photos.
* Can Be Intimidating: The size of the lens, especially when paired with a professional camera body, can feel intimidating to some subjects.
Alternatives to the 70-200mm Lens:
* 85mm Prime: A classic portrait lens, known for its flattering focal length and beautiful bokeh. Often more affordable and compact than a 70-200mm.
* 105mm Prime: A slightly longer focal length, offering more compression and subject isolation.
* 135mm Prime: Excellent for headshots and isolating subjects. Provides even more compression than 85mm or 105mm.
* 50mm Prime: While not the typical portrait lens, it can be used effectively for environmental portraits.
* 24-70mm Lens: A versatile zoom lens that can be used for a variety of purposes, including portraits, but it lacks the compression and shallow depth of field of a 70-200mm.
* Variable Aperture Telephoto Zoom (e.g. 70-300mm, 55-250mm): Often more affordable and lighter than f/2.8 70-200mm lenses, but they have slower apertures, limiting low-light performance and background blur.
Conclusion:
A 70-200mm lens is a powerful tool for portrait photography, offering compression, subject isolation, and beautiful bokeh. However, it's not an absolute necessity. Many photographers create stunning portraits with other lenses, especially prime lenses.
Before investing in a 70-200mm, consider:
* Borrowing or renting one: Try it out to see if it suits your style and workflow.
* Assessing your current needs and budget: Are there other equipment upgrades that would be more beneficial?
* Experimenting with different focal lengths: See what kind of results you can achieve with the lenses you already own.
Ultimately, the best lens for you is the one that helps you achieve your creative vision and delivers the results you're looking for. Don't get caught up in the "must-have" mentality. Focus on mastering the lenses you *do* have and then make informed decisions about adding to your kit.