Shorter exposures with a wide-angle lens can still provide enough light to show the stars in a night sky without trailing. 30-second exposure at ISO 400 on a Canon 5D DSLR at 14mm and f/8. Click photo for larger image. As mentioned before, the stars appear to move at about 1/2-degree per minute across the sky.
System Development Life Cycle Phases: 1- System Planning. The Planning phase is the most crucial step in creating a successful system, during this phase you decide exactly what you want to do and the problems youâre trying to solve, by: Defining the problems, the objectives and the resources such as personnel and costs.
Most popular system development method is system development life cycle (SDLC) which supports the business priorities of the organization, solves the identified problem, and fits within the existing organizational structure. 17 people found this useful.