Best astrophotography lenses for the Sony a7S III
18 astrophotography lenses that fit the Sony a7S III (Sony E mount) — wide and bright for stars and night sky. Sorted brightest-aperture first; every spec from the manufacturer's catalog.
Start with the Voigtländer Nokton 21mm f/1.4 E. At f/1.4 it is the brightest of the 18 astrophotography Sony E lenses that fit the Sony a7S III — the full comparison is below.
It is manual focus — no autofocus on the Sony a7S III. If you want autofocus for astrophotography, the brightest AF option here is Sigma 24mm f/1.4 DG DN Art at f/1.4.
Check the Voigtländer Nokton 21mm f/1.4 E price on Amazon →
One limit of this table: it lists only Sony E lenses that mount natively on the Sony a7S III — lenses fitted through an adapter are not included here. See which mounts adapt to which.
Weight & weather sealing on the Sony a7S III
On long approaches the decision is often made by weight, not aperture. Published weights for 16 of the 18 lenses above (the other 2 have no verified weight in our dataset yet — omitted, never estimated):
| Lens | Weight | Weather sealing |
|---|---|---|
| Samyang AF 24mm f/1.8 FE | 230g | Not verified |
| Sony FE 16mm f/1.8 G | 304g | Not verified (weight from Sony product code SEL-16F18G; sealing not stated on the source page) |
| Zeiss Batis 18mm f/2.8 | 330g | Weather-sealed |
| Zeiss Batis 25mm f/2 | 335g | Weather-sealed |
| Sony FE 20mm f/1.8 G | 373g | Weather-sealed |
| Sony FE 24mm f/1.4 GM | 445g | Weather-sealed |
| Sony FE 14mm f/1.8 GM | 460g | Weather-sealed |
| Laowa 15mm f/2 Zero-D FE | 500g | None claimed |
| 7Artisans AF 10mm f/2.5 (fisheye) | 504g | Not verified (weight from the third-party E-mount list row 'AF 10mm F2.5'; sealing not stated on the source page) |
| Samyang AF 14mm f/2.8 FE | 505g | None claimed |
| Sigma 24mm f/1.4 DG DN Art | 510g | Weather-sealed |
| Viltrox AF 16mm f/1.8 | 550g | Not verified |
| Sony FE 12-24mm f/4 G | 565g | Not verified (weight from Sony product code SEL-1224G; sealing not stated on the source page) |
| Tamron 12-20mm F2.8 (A084) | 570g | Weather-sealed (Tamron's own term is "Moisture-Resistant Construction" — "leak-resistant seals throughout the lens barrel"; the maker does not use the words weather-sealed. Source page states "Length and weight are for Sony E-mount", so 570g is the Sony E figure (the nikon-z entry's 585g comes from a different source and is not in conflict).) |
| Sigma 14-24mm f/2.8 DG DN Art | 795g | Weather-sealed |
| Sony FE 12-24mm f/2.8 GM | 847g | Weather-sealed |
Packing light? The lightest here is the Samyang AF 24mm f/1.8 FE at 230g. The lightest weather-sealed option is the Zeiss Batis 18mm f/2.8 at 330g.
Complete the kit for the Sony a7S III
- The Voigtländer Nokton 21mm f/1.4 E takes 62mm front filters. One 62mm set (polariser, ND) also fits every other 62mm lens you add later — see which ones. 62mm filters on Amazon →
- The Sony a7S III takes an NP-FZ100 battery (CFexpress Type A memory cards, SD cards) — a spare battery and the right card class are body-specific, not lens-specific. NP-FZ100 battery on Amazon →
FAQ
What is the best astrophotography lens for the Sony a7S III?
Voigtländer Nokton 21mm f/1.4 E (21mm f/1.4) is the standout astrophotography option that fits the Sony a7S III. 18 astrophotography Sony E lenses fit in total — compare them below.
Do these astrophotography lenses fit the Sony a7S III?
Yes — every lens here is a Sony E mount lens, so it fits the Sony a7S III and covers its full-frame sensor.
What is the lightest astrophotography lens for the Sony a7S III?
The Samyang AF 24mm f/1.8 FE at 230g (manufacturer-published weight). The lightest weather-sealed option is the Zeiss Batis 18mm f/2.8 at 330g. Weights for 16 of the 18 lenses on this page are in the weight table above.
Already own the Sony a7S III, shopping for a spare or an upgrade? Sony a7S III on Amazon →
All lenses for the Sony a7S III · the same use across mounts: Astrophotography lenses for Sony E · all cameras