Due to inch-based sensor formats being not standardized, their exact dimensions may vary, but those listed are typical. The listed sensor areas span more than a factor of 1000 and are proportional to the maximum possible collection of light and image resolution (same lens speed, i.e., minimum F-number), but in practice are not directly proportional to image noise or resolution due to other limitations. See comparisons. Film format sizes are included for comparison. The following comparison is with respect to the aspect ratio of 4:3. The application examples of phone or camera may not show the exact sensor sizes.