Pick the Right Drywall Type for Your Project. Homeowners can choose between fire- and moisture-resistant drywall, and select drywall thickness. When purchasing drywall for a home improvement project, homeowners can choose between drywall thickness and its ability to resist moisture and mildew.
The numbers you have indicated (4x32) are for a 4-power magnification (4x) riflescope with a 32mm objective (front) lens. You cannot make the scope stronger.2 means the diameter of the scope tube. Wider tubes gather more light, but this is mostly important for bigger magnifications. 4x32 is a common setup for a 22 rifle scope 3-9x40 is a common deer hunting scope.
3 Answers 3. The mm of a lens is the focal length. To take close-up shots of things far away, you need a long focal length, which means high mm. An entry or mid-level Canon camera has an APS-C sized sensor. The sensor size is really what determines what the meaning of the focal length is â focal length and sensor size together give you angle of view.