Sirui Saturn RF50B-A 50mm

★★★★★ 4.5 (22)

At just 465g, the carbon fiber build makes this the lightest full-frame 1.6x anamorphic, delivering a 2.4:1 or wider 2.8:1 aspect ratio with a T2.9 aperture and 10-blade diaphragm for oval bokeh. Its compact size mounts on gimbals and FPV drones for unique overhead perspectives, and optional blue or natural flare coatings add stylistic control. This manual-focus lens suits solo filmmakers and drone operators prioritizing a portable, cinematic look without heavy rigging.

Focal length 50mm
Aperture T16
Mount Canon RF
stabilization Sim
Weight 465 g
af type Manual Focus
lens type prime
Sirui Saturn RF50B-A 50mm lens
52 Pontuação Geral

Sem preço atual de lojas

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Resumo

The 30-Second Version

The Sirui Saturn 50mm T2.9 is a featherweight full-frame anamorphic that delivers the cinematic squeeze for under USD 500. Stabilization is a standout at the 81st percentile, and the 465g build makes it gimbal and drone ready. Manual focus and a 900mm minimum focus distance are the trade-offs, but for the price, it's a fun and capable entry into anamorphic shooting.

Pros & Cons

Prós

  • Incredibly light at 465g for a full-frame anamorphic 81st
  • Carbon fiber build keeps it gimbal and drone friendly 79th
  • 1.6x squeeze gives that wide cinematic look without breaking the bank 68th
  • Stabilization ranks in the 81st percentile, a real plus for handheld work

Contras

  • Manual focus only, and the AF score is a dismal 14th percentile
  • Minimum focus distance of 900mm kills any close-up work
  • Flare effect is subtler than many buyers expect
  • No weather sealing, so keep it out of the rain

O que dizem os donos

The Word on the Street

4.5/5 (22 reviews)
👍 Owners consistently rave about the cinematic anamorphic look, with several comparing their footage to big-budget action movies.
👍 The compact and lightweight build gets repeated praise, especially from shooters using gimbals and handheld rigs.
🤔 A few buyers mention the flare effect is subtler than expected and requires stopping down the aperture to get the classic anamorphic streak.
👎 Some users report compatibility issues with magnetic filter systems, including vignetting with certain setups.

Como a opinião dos donos mudou ao longo do tempo

Exclusivo

Com base em quando os clientes realmente escreveram suas avaliações - para ver se os elogios iniciais se mantiveram.

A opinião dos donos melhorou ao longo do tempo
88/100Nossa análise de sentimento por IAconfiança baixa · 7 fontes · jun. de 2026
1★2★3★4★5★Q4 '24: 5.0★ · 1 avaliaçãoQ2 '25: 4.5★ · 2 avaliaçõesQ3 '25: 5.0★ · 3 avaliaçõesQ4 '25: 5.0★ · 1 avaliação1231Q4 '24Q2 '25Q3 '25Q4 '25
Avaliação médiaSatisfeitos (4-5★)Insatisfeitos (1-2★)Altura da barra = número de avaliações

Com base em 7 avaliações de clientes datadas, agrupadas por trimestre civil. A análise por período está em inglês.

As provas

Performance

Optically, this lens sits at the 68th percentile in our database. That's solid, not spectacular. The 17 elements in 12 groups do a decent job controlling chromatic aberration, and the 10-blade diaphragm keeps bokeh reasonably smooth. But the minimum focus distance of 900mm is rough. You're not getting close-up shots with this thing. The T2.9 to T16 range gives you some flexibility, though the aperture sits at the 44th percentile, which means it's middle of the pack. Stabilization is where it surprises, landing at the 81st percentile. That's genuinely helpful for handheld and gimbal work. The manual focus ring has a 120-degree rotation, which is short for precise pulls but fine for run-and-gun shooting.

Performance Percentiles

AF 14.8
Bokeh 44.8
Build 56.3
Macro 44.4
Optical 67.5
Aperture 44.9
User Sentiment 81.4
Versatility 33.2
Prova social 50.7
Stabilization 79.3

Specifications

Full Specifications

Optics

Type Prime
Focal Length Min 50
Focal Length Max 50
Elements 17
Groups 12

Aperture

Max Aperture T16
Min Aperture T2.9
Constant Yes
Diaphragm Blades 10

Build

Mount Canon RF
Format full-frame
Weight 0.5 kg / 1.0 lbs
Filter Thread 62

AF & Stabilization

AF Type Manual Focus
Stabilization Yes

Focus

Min Focus Distance 900
Max Magnification 1:16.2

vs Competition

Stacked against the Sigma 18-50mm f/2.8 or Tamron 17-70mm f/2.8, this Sirui is a completely different animal. Those are versatile zooms for hybrid shooters. The Saturn is a specialty cine lens. The Viltrox 35mm f/1.7 gives you autofocus and a faster aperture for less money, but it's spherical and won't give you that anamorphic squeeze. The Panasonic Leica 12-35mm and Nikon Z 17-28mm are both sharper and more practical for everyday work. But none of them produce oval bokeh or horizontal flares. If you want the anamorphic look on a budget, the Sirui is basically in a class of one here.

Spec Sirui Saturn RF50B-A 50mm Tamron Di III VC 28-300mm f/4-7.1 VXD Sigma Art 17-40mm f/1.8 DC Sony E 18-135mm f/3.5-5.6 OSS Nikon NIKKOR Z 17-28mm f/2.8 Panasonic Lumix G Leica DG Vario-Elmarit 8-18mm f/2.8-4
Focal Length 50mm 28-300mm 17-40mm 18-135mm 17-28mm 8-18mm
Max Aperture T16 f/4 f/1.8 f/3.5 f/2.8 f/2.8
Mount Canon RF Sony E Fujifilm X Sony E Nikon Z Micro Four Thirds
Stabilization true true false true false true
Weather Sealed false true true false true true
Weight (g) 465 590 535 326 450 313
AF Type Manual Focus VXD linear motor HLA (High-response Linear Actuator) Linear motor Stepping Motor 240-fps autofocus drive
Lens Type prime zoom zoom zoom zoom zoom
Compare Compare Compare Compare Compare
Produto AFBokehBuildMacroOpticalApertureUser SentimentVersatilityProva socialStabilization
Sirui Saturn RF50B-A 50mm 14.844.856.344.467.544.981.433.250.779.3
Tamron Di III VC 28-300mm f/4-7.1 VXD Compare 97.783.462.983.296.370.892.197.950.479.3
Sigma Art 17-40mm f/1.8 DC Compare 53.9976772.296.695.398.375.794.134.4
Sony E 18-135mm f/3.5-5.6 OSS Compare 97.781.270.937.37882.647.195.890.779.3
Nikon NIKKOR Z 17-28mm f/2.8 Compare 84.690.573.683.287.888.292.167.266.734.4
Panasonic Lumix G Leica DG Vario-Elmarit 8-18mm f/2.8-4 Compare 53.986.683.535.193.488.281.475.280.879.3

Preço

Value & Pricing

At USD 499 in the US, this is one of the cheapest ways into full-frame anamorphic territory. The EUR pricing is all over the place though, ranging from EUR 439 to EUR 549 across four listings in Germany, Spain, France, and Italy. If you're in Europe, shop around. The lowest EUR 439 listing is the one to grab. For what you get, a lightweight carbon fiber anamorphic with a 1.6x squeeze, the value proposition is strong. It's not a perfect lens, but it's a fun one, and that counts for a lot when you're chasing a specific look.

Price History

MX$ 8.000 MX$ 10.000 MX$ 12.000 MX$ 14.000 MX$ 16.000 2 de jun.18 de jul.24 de out. MX$ 13.665

Saiba mais

Overview

The Sirui Saturn 50mm T2.9 is a full-frame anamorphic lens that squeezes a 1.6x cinematic look into a package under 500 grams. That's genuinely wild for this category. Carbon fiber construction keeps it light enough for gimbals, FPV drones, and handheld rigs without your arms filing a complaint. It's manual focus only, which is expected for cine glass, but worth knowing before you click buy.

At 50mm with a 1.6x squeeze, you're getting the horizontal field of view of a 22mm spherical lens. That means wide, dramatic shots with oval bokeh and horizontal flares. The T2.9 max aperture isn't the fastest thing out there, but it's workable for most narrative and commercial work. This is a specialty tool for people who want the anamorphic look without selling a kidney or hiring a focus puller.

Common Questions

Q: Does this lens work on APS-C cameras?

Yes, it's designed for full-frame but will work on APS-C RF mount bodies with a crop factor. You'll get a tighter effective field of view, around 80mm equivalent, and the anamorphic squeeze still applies.

Q: Can I use this lens for photography or is it video only?

You can shoot stills with it, but the anamorphic squeeze means you'll need to de-squeeze images in post. It's really built for video work, and the manual focus plus T-stop aperture markings make it a cine-first lens.

Q: What's the difference between blue flare and natural flare versions?

The blue flare version produces cool, sci-fi style horizontal streaks when pointed at light sources. The natural flare version gives a softer, warmer look. Both are optional at purchase, and the flare intensity can be adjusted by changing your aperture.

Who Should Skip This

Skip this if you need autofocus, weather sealing, or close-up capability. The AF score is a brutal 14th percentile, and the 900mm minimum focus distance means no detail shots. If you're a hybrid shooter who bounces between photos and video, a standard zoom like the Sigma 18-50mm will serve you better. And if you're shooting in wet or dusty conditions, the lack of weather sealing is a real liability.

Verdict

Buy this if you're a filmmaker or content creator who wants the anamorphic look without spending five figures. It's light enough for gimbals and drones, the image quality is solid, and the price is right. The manual focus and 900mm minimum focus distance mean you need to plan your shots. But if you're shooting music videos, short films, or stylized commercial work, this lens delivers a look that's hard to replicate with spherical glass. The 4.5-star rating from 22 reviews backs that up.

Usage Scores

Macro (50.3)Geral (52.4)Budget (41.3)Street (44.2)Travel (36.7)Portrait (49.2)Landscape (42.2)Professional (46.6)Video Cinema (54.9)Wildlife Sports (33.3)

Outras configurações1

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