Fall & Spring Semesters. 1  Undergraduate students must be enrolled in at least 12 credit hours to be considered full time and enrolled in at least nine hours in order to be three-quarter time. 2  Enrollment in six to eight hours is considered half time and enrollment in five or fewer hours is considered less than half time.
Yep you've got the abbreviations right. Av = aperture value = aperture priority auto exposure Tv = time value = shutter priority auto exposure Both of these modes allows you to set a firm value for either aperture or shutter speed, and let the camera work out the exposure needed.
Many lenses start with the abbreviation AF or AF-S.. This denotes whether the lens has a built-in focus motor or if it must rely on the motor inside the camera. Photographers whose camera does not have a built-in motor should choose lenses with the AF-S designation, while those with a motor can use either type.