Final answer:
Keisha should look for both suitable lenses for different photography needs and a sturdy camera bag for protection and portability when purchasing a secondhand camera. Lenses allow for capturing various subjects, while a camera bag ensures the equipment's safety and ease of transport.
Step-by-step explanation:
The most important accessories Keisha should look for when purchasing a secondhand camera are (c) both (a) and (b). Lenses suitable for various photography needs are essential, as they allow her to photograph a wide range of subjects and scenarios effectively. Additionally, a sturdy camera bag is important for protecting the camera and making transportation easier.
Understanding that electronics are a significant part of a digital camera's functioning, the physical aspect, primarily the optics, is determined by basic physics. A digital camera works similarly to a single lens, where the object distance is significantly larger than the lens's focal distance. Hence, having various lenses can help Keisha capture different levels of detail and field depths.
Moreover, a good camera bag not only provides protection but also ensures the portability of the camera and its accessories. When moving about, this can relieve some of the worries about damaging the equipment. Ultimately, having both the right lenses and a reliable camera bag (which often includes protective padding) will enhance her photography experience and safeguard her investment in the secondhand camera.