3 Review(s)

Magnification (7x): This means the binoculars will magnify objects 7 times their original size. It's a moderate level of magnification, great for general outdoor use like birdwatching or sporting events, where a wider field of view is beneficial.Objective Lens Diameter (30mm): The number "30" refers to the diameter of the objective lenses (the lenses at the front of the binoculars). A 30mm objective lens is fairly compact, making these binoculars relatively lightweight and easy to carry. However, they won’t gather as much light as larger lenses, meaning they might not perform as well in low-light conditions.Field of View: With 7x magnification, these binoculars typically provide a wider field of view than higher magnification models, which is great for tracking moving objects or enjoying panoramic views.Compact and Portable: With a 7x magnification and a 30mm objective, these binoculars are generally lightweight and compact, making them a good choice for those who need something easy to carry for travel or casual use.Exit Pupil: The exit pupil is calculated by dividing the objective lens diameter (30mm) by the magnification (7). In this case, the exit pupil is about 4.3mm. This is a good size for general use, offering a comfortable exit of light for most people’s eyes.Prism Type: Many 7x30 binoculars use either roof prisms (for a more compact design) or Porro prisms (which tend to offer better depth perception and are usually bulkier).Coatings: Many models come with some form of lens coating (e.g., multi-coated or fully multi-coated lenses), which reduces glare, improves light transmission, and enhances the image quality, especially in bright conditions.Waterproof and Fog-resistant: Depending on the brand and model, many modern binoculars are waterproof or fog-resistant, making them suitable for outdoor use in various weather conditions.