Sigma 35mm F1.4 DG II Art Lens - L-Mount

Yes, the bright f/1.4 aperture makes it excellent for capturing stars and night skies with good detail and minimal noise, especially when paired with an L-Mount camera body capable of high ISO performance.

The minimum focusing distance for this lens is 28 centimeters (approximately 11 inches).

This lens is designed for full-frame format. While it might physically mount on a crop-sensor L-Mount camera, its field of view will be narrower, and it's intended for full-frame use to achieve its specified characteristics.

The floating focus system adjusts the position of lens elements independently based on the focusing distance. This corrects for aberrations like sagittal coma flare and field curvature, leading to sharper images, particularly at closer focusing distances and wide apertures.

The lens uses a 67mm filter size.

Yes, the lens features a dust and splash-proof structure for added durability in various shooting conditions.

The DG II designation typically indicates an updated optical design and potentially improved features. For this lens, it specifically highlights a refined compact and lightweight design and enhanced optical performance, especially for video.

Ensure the lens is securely mounted by rotating it until it clicks. Check the camera's electronic contacts and the lens's mount contacts for dirt or debris and clean gently with a dry microfiber cloth. Try a different L-Mount lens to rule out a camera issue.

Ensure your camera's firmware is up to date, as updates often improve lens compatibility and performance. Clean the lens and camera electronic contacts. In very low light, autofocus performance can be naturally slower. Try focusing on a higher contrast area.

Verify that the correct aperture is set and that the focus mode is appropriate for your subject. Ensure you are focusing on the desired plane. Check that the floating focus system is functioning correctly by testing focus at different distances.

Gently exercise the focusing ring. If the stiffness persists or is accompanied by unusual noise, do not force it. Contact customer support for inspection, as internal lubrication may be required.