Arguments for a 70-200mm lens:
* Compression: This focal length range offers beautiful background compression, making the subject pop and blurring the background nicely. This is a key element of many classic portrait styles.
* Working Distance: It allows you to work at a comfortable distance from your subject, which can be particularly beneficial when shooting shy individuals or in situations where getting too close isn't ideal (e.g., events). This distance can also help create a more intimate and flattering perspective.
* Versatility: While primarily used for portraits, it's also useful for events, candid shots, and even some sports photography.
* Fast Apertures: Many 70-200mm lenses offer wide maximum apertures (e.g., f/2.8), enabling beautiful bokeh and better low-light performance.
Arguments against a 70-200mm lens:
* Cost: High-quality 70-200mm lenses, especially those with fast apertures, are expensive. This is a significant barrier for many photographers, particularly those starting out.
* Size and Weight: These lenses are relatively large and heavy, which can be cumbersome, especially for all-day shoots or when traveling.
* Alternatives Exist: Other lenses, like 85mm prime lenses, can offer similar compression and bokeh at a lower price and weight. A zoom lens like a 24-70mm also offers versatility although the compression won't be as significant.
* Not always necessary: If you primarily shoot environmental portraits or work in tight spaces, a shorter lens might be more suitable.
In conclusion:
A 70-200mm lens is a fantastic tool for portrait photography, offering excellent compression and working distance. However, it's not an absolute necessity. A skilled photographer can create stunning portraits with other lenses. Before investing in a 70-200mm, consider your shooting style, budget, and whether the benefits outweigh the cost and logistical considerations. Rent one first to see if it's a good fit for you.