The Nikon AF DC-NIKKOR 105mm f/2D Lens boasts several key features including a defocus-image control that allows for control over the degree of focus in the foreground or background. It has a fast f/2 maximum aperture, ideal for low light conditions and creating a shallow depth of field. The lens also includes a Super Integrated Coating to reduce flare and ghosting, ensuring high-quality color balance and sharpness.

Absolutely, the Nikon 105mm f/2D is especially suitable for portrait photography. Its focal length and fast aperture are perfect for creating a pleasing background blur that really makes the subject stand out. The defocus control also allows photographers to fine-tune the aesthetic of the bokeh, making it an excellent choice for professional portrait photographers.

Yes, the Nikon 105mm f/2D lens is compatible with both full-frame (FX) and crop-sensor (DX) Nikon DSLR cameras. On crop-sensor cameras, it provides an equivalent focal length of approximately 157.5mm, offering a longer reach and a tighter field of view, which is great for close-up portraits and detailed shots.

The defocus control feature on the Nikon 105mm f/2D lens allows photographers to subtly adjust the out-of-focus elements (bokeh) before taking a shot. By turning the DC ring, you can shift the point of optimal focus in front of or behind the focus plane, enhancing the lens's ability to render out-of-focus elements more smoothly or with more emphasis, depending on the desired effect. This feature is particularly useful in portrait and artistic photography, where precise control over the image composition is key.