Use this app to store a list of your current camera lenses and to plot the focal-length vs aperture for each. They key feature of this app is the graphical plot (focal-length vs aperture) of your selected lenses.
Focal-length and Aperture are the two most important factors when evaluating lenses. This app will assist photographers in documenting their current lens inventory and also aiding them when looking for additional lenses.
Note: Currently for Canon lenses only.