Sigma just expanded its popular popular Art line with two new fast wide-angle Art lenses—both the 20mm f/1.4 DG DN Art and the 24mm f/1.4 DG DN Art are designed for full-frame Sony E-Mount and Leica L-Mount cameras (the previous 20mm and 24mm f/1.4 DG HSM Art lenses were designed for DSLRs). While these new lenses are the same focal length and offer the same fast aperture, they are specifically designed for full-frame mirrorless cameras and are smaller and lighter thanks, in part, to the shorter flange back of the mirrorless construction.

In addition to their more compact design, Sigma improved optical performance, performance especially at the periphery of the frame. Both lenses are equipped with several useful features including a manual focus lock switch, focus mode switch and, if supported by your camera, a customizable AFL button. Sony E-mount versions of the lenses also support Sony’s AF Assist, in some cameras but Sigma plans to include this capability in future Sony E-mount lenses and make this helpful feature available in older lenses via a firmware update in the future. With a nod towards video capture, the aperture click switch can be “de-clicked” for smooth and quiet motion clips. Both cameras also come with lens hoods.

With fast apertures, these lenses are perfect for low light shooting, of course. And while portrait and wedding photographers may choose the 24mm over the 20mm for their shoots, both lenses will work well for group shots, environmental portraits and, of course, landscapes.

[Read: Test Results: The Sigma fp L Goes Under the Microscope]

Perhaps what’s most interesting is Sigma’s attention to astrophotography with these lenses, particularly the 20mm. For example, when shooting the night sky, it’s critical to focus at infinity. With the lenses’ MFL locks, astrophotographers no longer have to tape the lens to help maintain focus at infinity against accidental movement. Both lenses also feature a rear filter holder as well as a front filter thread since astrophotographers will often use dual filters. The ability for the lenses to capture small points of light against dark backgrounds (like stars) has been improved by controlling Sagittal Coma—that flare-like imperfection that often occurs in these types of scenarios. And, for the serious astrophotographer, the 20mm’s Lens Heater Retainer will come in handy since you can securely attach a heat strip to avoid the formation of condensation when shooting in low temperatures.

[Read: Sigma’s 35mm f/1.4 DG DN Art Redesigned for Mirrorless]

While astrophotography has rapidly gained in popularity, it may not be high on your list of shooting styles or genres. Even so, it’s worth exploring since combining astrophotography with portraits can create some beautiful images. But these lenses provide far more versatility than just night sky photography as we mentioned earlier. And, at $799 (24mm) and $899 (20mm), they might fit easily into your budget.

For more details: sigmaphoto.com