Sigma 10-20mm F3.5 Ex DC HSM. This super-wide angle lens has a maximum aperture of F3.5 throughout the entire zoom range. With its wide angle view from 102.4 degrees it can produce striking images with exaggerated perspective. The maximum aperture of F3.5 is ideal for indoor shooting and it enables photographers to emphasize the subject.
The question of choosing equipment for shooting spherical panoramas and creating virtual tours is one of the most important for a photographer - a panoramic photographer. On the TrueVirtualTours website, you have access to examples of work performed using one or other equipment and software.