These are the best Pentax lenses for wedding photography when you want fast, reliable autofocus, creamy rendering, and sealed, day-long durability from prep to sparkler exit—across APS-C and full-frame K-mount—and here’s what to look for as you buy: prioritize constant f/2.8 zooms (or fast primes) for dim churches and receptions, modern drive motors (PLM/DC/updated SDM) for confident AF-C, WR/AW sealing for rain and seaside spray, close-focus or true macro for rings and details, smooth bokeh from rounded diaphragms, flare resistance for backlit veils and fairy lights, minimal focus breathing if you shoot video, balanced weight for long handheld blocks, and consistent color across lenses to simplify grading; a focus limiter on teles reduces hunting during processions, while shared filter sizes speed up ND/polarizer swaps for outdoor ceremonies. Full-frame coverage starts with the HD PENTAX-D FA 24–70mm f/2.8 ED SDM WR as the A-cam mid-range—sharp, sealed, fast enough for aisles and dance floors—paired with the HD PENTAX-D FA* 70–200mm f/2.8 ED DC AW for tearful moments from the back row, compressed portraits, and clean stage looks; if you want lighter carry for long days, the HD PENTAX-D FA 70–210mm f/4 ED SDM WR keeps sealing and close focus with excellent contrast. For sweeping venues, décor plates, and blue-hour couples, the HD PENTAX-D FA 15–30mm f/2.8 ED SDM WR brings bright ultra-wide reach and tank-tough build, while the compact, sealed HD PENTAX-D FA 21mm f/2.4 Limited DC WR adds jewel-like rendering and modern coatings for sun-through-glass glow. Prime speed lifts portraits and low light: the HD PENTAX-D FA* 50mm f/1.4 SDM AW for first looks and storytelling, the HD PENTAX-D FA* 85mm f/1.4 SDM AW for hero portraits with luxurious bokeh, and the characterful FA Limited trio—31mm f/1.8, 43mm f/1.9, 77mm f/1.8—when you want compact metal builds and cinematic falloff. Detail work belongs to the HD PENTAX-D FA 100mm f/2.8 Macro WR, whose 1:1 precision, rounded blades, and WR metal barrel make it perfect for rings, florals, stationery, and cake textures without moving lights. On APS-C, the HD PENTAX-DA★ 16–50mm f/2.8 ED PLM AW is the modern workhorse—lightning-fast PLM AF, sealed, sharp—paired with the smc/HD PENTAX-DA★ 50–135mm f/2.8 ED [IF] SDM for ceremony reach and flattering compressions; add the HD PENTAX-DA★ 11–18mm f/2.8 ED DC AW for tight chapels and energetic dance-floor wides. Fast APS-C primes keep kits tiny without sacrificing look: the smc/HD PENTAX-DA★ 55mm f/1.4 SDM for low-light portraits, HD PENTAX-DA 70mm f/2.4 Limited for discreet candids, and HD PENTAX-DA 35mm f/2.8 Macro Limited for table details and flat-lays that cut seamlessly into the edit. Practical buyer tips: build around a two-zoom spine (24–70/2.8 + 70–200/2.8 FF; 16–50/2.8 + 50–135/2.8 APS-C) and add one fast prime you love for signature style; keep a true macro on hand so you aren’t faking close-ups; if you film, test breathing and MF throw (the D FA* primes and 70–210/4 are well-behaved); pick WR lenses and use hoods outdoors; match filter sizes (67/77/82mm) to streamline polarizers/NDs; and balance weight you can carry all day over specs you’ll leave in the bag. Shooting tips: use back-button AF with AF-C and a limiter on teles for processions, TAv or Manual + Auto-ISO to lock shutter/aperture under flicker, give subjects background distance for smoother bokeh, enable SR for handheld stills (disable on monopods/tripods), and lean on Pentax color profiles and Quick-Shift to micro-tune focus after lock. Whether you’re capturing quiet window-light vows, windy confetti exits, or late-night dance-floor chaos, the best Pentax wedding lenses combine fast glass, sealed, video-friendly mechanics, and consistent color—so you deliver clean, romantic images and footage from first look to last sparkler.