These are the best Tamron lenses for astrophotography when you want tight star shapes, controlled coma/sagittal astigmatism, quick and quiet AF for night landscapes and astro-portraits, and practical handling for trackers and cold nights—and here’s what to look for as you buy: prioritize fast ultra-wides and normals (ƒ1.4–ƒ2 on adapted SP primes; constant ƒ2.8 zooms on mirrorless), good wide-open corner discipline, minimal focus breathing if you film, short minimum focus distance for foreground interest in Milky Way scenes, and light, compact barrels that balance on small star trackers; skip front filters at night (no CPL/VND), favor lenses with clear distance scales for repeatable infinity, and carry a hood to tame oblique flare from towns or moonlight. Full-frame wide/normal heroes: 17–28mm ƒ2.8 Di III RXD (featherweight UWA with crisp corners and good flare control—workhorse for Milky Way arches, blue-hour-to-night blends), 20–40mm ƒ2.8 Di III VXD (versatile for astro + foreground storytelling and walk-in scouting on a gimbal), 28–75mm ƒ2.8 Di III VXD G2 (use 28–35 mm for stitched night panoramas; great close-focus for star-lit foreground textures), and the range king 35–150mm ƒ2–2.8 VXD (35/ƒ2 for astro-portraits, 85–135 mm for compressed constellations or moonlit ridgelines without swaps); adapted DSLR legends for speed and point-star rendering: SP 35mm ƒ1.4 Di USD (stellar coma control—night street + Milky Way favorite), SP 15–30mm ƒ2.8 VC (classic fast UWA with stabilization that helps framing, then switch VC off on a tracker), SP 24–70mm ƒ2.8 G2 VC (mid-range nightscapes and tracked mosaics), and SP 45/1.8 VC or SP 85/1.8 VC for dreamy night portraits with city glow. Tele for moon/constellation compression and airglow layers: 50–400mm ƒ4.5–6.3 VC VXD (surprisingly sharp at the long end and 0.5× at 50 mm for night macro textures) and 150–500mm ƒ5–6.7 VC VXD (lunar, tele constellations, and noctilucent cloud details—lean on VC for framing, off on tracker). APS-C standouts: 11–20mm ƒ2.8 Di III-A RXD (bright, tiny, great corners at practical apertures) and 17–70mm ƒ2.8 Di III-A VC RXD (do-it-all travel night zoom; use 17–24 mm for stars and 70 mm for moonlit details); full-frame 17–28/2.8 and 20–40/2.8 also shine on crop for bonus reach. Practical buyer tips: build a two-lens spine (17–28/2.8 + 35/1.4 via adapter for speed, or 20–40/2.8 + 35–150/2–2.8 for hybrid astro + portraits) and add a long zoom (150–500 or 50–400) if the moon and tele constellations are on the menu; standardize to 67 mm threads where possible for daytime work, but leave filters off at night; test your copy for sagittal smear at the edges and plan to stop 1/3–2/3 stop if needed; lighter glass pays off on ridgelines and small trackers. Night-shooting tips: use the NPF rule (more accurate than the 500-rule) for max shutter untracked, start around ƒ1.4–ƒ2.8 and ISO 3200–6400 for Milky Way, focus with magnification on a bright star and set a repeatable tape mark, bracket a blue-hour foreground then blend with star frames for noise-free detail, and consider stacking (10–30 frames) to clean noise on static scenes; on a tracker, drop ISO and stop down slightly for sharper corners (mind polar alignment), and for astro-portraits set 35–85 mm around ƒ1.8–ƒ2.8 with off-camera LED fill at low power; shield the lens from stray light with your hand/hood, watch dew (carry a small heater band), and disable stabilization on sticks/trackers; whether you’re framing a sweeping Milky Way arch, moonlit dunes, a tracked Orion mosaic, or a couple under the stars, the best Tamron lenses for astrophotography combine fast apertures, disciplined point-light rendering, and travel-friendly handling—so your stars stay tight, your foregrounds stay clean, and your night images glow with detail.