When choosing binoculars for low light conditions, look for a large objective lens diameter, typically around or above 40mm. This allows more light to enter the binoculars. Additionally, consider binoculars with fully multi-coated lenses and high-quality prisms like BAK-4 for better light transmission and image clarity.

In low light conditions, lower magnification can often be more beneficial as it provides a wider exit pupil, allowing more light to reach your eyes. A magnification range between seven and ten times is generally recommended for low light binoculars to balance brightness and detail.

The exit pupil is crucial because it determines how much light reaches your eye through the binoculars. In low light situations, an exit pupil size closer to the human eye's dilation (around seven millimeters) ensures that you get the brightest possible image.

Both roof and porro prism designs can perform well in low light if they are well-made. However, porro prism binoculars often provide better depth perception and wider field-of-view, which can be advantageous in dim lighting. Roof prisms are more compact but may require higher quality coatings to match the performance.

Yes, some advanced binoculars incorporate night vision technology, which amplifies available ambient light to provide visibility in near-total darkness. These are particularly useful for activities like wildlife observation or surveillance during nighttime.