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.
3. The Systems Development Life Cycle (SDLC) - The concept is the application of the systems approach to the solution of information systems problems. a. Systems Analysis and Design-is a substantial part of the systems development life cycle (SDLC).