Comparison · prices updated 2026-11-02
Sirui Saturn vs Sirui Venus
Both are full-frame 1.6x anamorphic lines at T2.9 and cost about the same per lens today. They differ in focal range, size, flare options and adapter support.
Short answer
- Choose Saturn if you need light lenses (under 500 g each, carbon-fibre barrel), want neutral flare as an option, or shoot Fujifilm X or DJI DL. Venus is not offered in those mounts.
- Choose Venus if you want longer focal lengths (100, 135, 150 mm), plan to reach 2x squeeze with the Sirui 1.25x adapter, or want the cheapest single lens in either line: the Venus 50 mm at $299.
- The newer Saturn V2 (35/50/75, T2.9 1.6x, $599 per lens) adds switchable horizontal and vertical shooting, according to Sirui.
Specs side by side
| Saturn (carbon fibre) | Venus | Source | |
|---|---|---|---|
| Focal lengths | 35, 50, 75 mm | 35, 50, 75, 100, 135, 150 mm | CSV + store variants |
| Squeeze | 1.6x | 1.6x (135 mm: 1.8x) | Sirui store |
| Max aperture | T2.9 | T2.9 | Sirui store |
| Coverage | Full frame | Full frame | Sirui store |
| Mounts (store options) | E, RF, L, Z, X, DL | E, RF, L, Z | Store variant options, 2026-11-02 |
| Flare options | Blue or neutral | Blue | Store variant options / product page |
| Weight | 390 g / 455 g / 465 g (35/50/75, E-mount) | not in our data unverified | Sirui product page |
| Filter thread | 58 mm (35) / 62 mm (50, 75) | 82 mm | Sirui product pages |
| Build | Carbon-fibre front barrel, aspherical elements | Uniform barrel, identical gear position, 1/4" thread | Sirui product pages |
| 2x with Sirui 1.25x adapter | not stated unverified | Yes, per Sirui (single-focus) | Sirui Venus product page |
| Lowest price today (new) | $499 | $299 | Official store, daily |
| Store compare-at | $1,299 per lens | $1,499 per lens | Store strike-through price |
Prices per focal length
Aspect ratio: identical
Both lines use a 1.6x squeeze, so the frame math is the same. Sirui states that a 3:2 sensor area desqueezes to 2.4:1 and a 16:9 area to about 2.8:1. Horizontally, a 35 mm lens frames like a ~22 mm spherical lens (35 ÷ 1.6). The Venus 135 mm uses 1.8x instead; Sirui notes it needs a slight crop to hit the same ratios. Try your own sensor in the squeeze factor calculator.
Flare and look
Venus is sold with blue flare only. Saturn comes in blue or neutral; Sirui describes neutral flare as taking on the colour of the light source. Our CSV earlier listed Saturn flare as "Silver / Blue / Gold". The current store variants only show Blue and Neutral, so we use those.
Price history
Tracking started on 2026-11-02. Each lens page has a daily price chart. Both lines currently sell well below their store compare-at prices ($1,299 for Saturn, $1,499 for Venus).