Nikon AF-S NIKKOR ED

Yes, this lens is fully compatible with both FX (full-frame) and DX (crop sensor) Nikon bodies. Keep in mind that on a DX camera, the 20mm focal length will provide a field of view equivalent to roughly 30mm, making it a slightly tighter, more standard wide-angle lens.

The fast f/1.8 aperture is excellent for low-light photography. It allows significantly more light to reach the sensor compared to standard zoom lenses, enabling you to shoot at faster shutter speeds or lower ISO settings to keep your images clean and sharp.

While 20mm is primarily an ultra-wide lens for landscapes and architecture, you can certainly use it for environmental portraits. The wide aperture creates a shallow depth of field that helps separate your subject from the background, though you should be mindful of potential distortion if you get too close to your subject's face.

Yes, this lens features an internal autofocus motor, making it compatible with all Nikon F-mount DSLR bodies, including those that do not have a built-in focus motor in the camera body itself.

Absolutely. Its compact and lightweight design makes it an ideal travel companion, especially if you want to capture expansive landscapes or tight interior spaces without carrying a heavy, bulky lens.