What do the numbers on a zoom lens mean?

Answer The numbers on a zoom lens can be confusing. Focal length, zoom range and minimum/maximum aperture are all important. Knowing how to interpret these numbers is a basic way to improve photographic s... Read More »

Top Q&A For: What do the numbers on a zoom lens mean

If you were to compare an EFS 18-55mm f3.5-5.6 Zoom Lens to a camera with built in optical zoom what would be the equivalent i.e. 4x 8x 12x etc.?

What do contact lens numbers mean?

As of 2004 all eye care providers in the United States are required by law to furnish a copy of your contact lens prescription. This is meant to allow you to purchase your lenses from any retailer,... Read More »

What is the difference between a zoom lens&a telephoto lens?

A telephoto lens uses optics to bring your photographic subject closer. A telephoto lens also may be a zoom lens. A zoom lens has a variable focal length.Prime vs. ZoomA telephoto lens may be a pri... Read More »

Do i need a 200mm zoom or a 300mm zoom lens?

On One Hand: A 200mm OverviewA 200mm zoom lens has a variable focal length (as in 70-200mm) with 200mm defining the extent of its telephoto capabilities. Because of the weight of a 200mm zoom lens,... Read More »