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Sirui Astra Series 1.33x Anamorphic 50mm T1.8

Sony E, Nikon Z, Micro 4/3 System · Full frame

Specifications

Shortest focal length
50.0 mm
Longest focal length
50.0 mm
Brightest aperture
1.8 f-number
Telephoto aperture
1.8 f-number
Smallest aperture
22.0 f-number

Measurements differ by mount. Shared specifications are above; measurements below apply only to the named version.

Micro 4/3 System version

Weight
560 g [8]
Length
106.6 mm [8]
Diameter
69.2 mm [8]
Filter thread
67 mm [8]
Closest focus
0.85 m [8]
Autofocus
No [8]
Elements
11 [8]
Groups
8 [8]

Nikon Z version

Weight
636 g [5]
Length
133 mm [5]
Diameter
80 mm [5]
Filter thread
67 mm [5]
Closest focus
0.5 m [5]
Maximum magnification
0.139 x [5]
Optical stabilization
No [5]
Released
2025 [5]

Sony E version

Weight
620 g [2]
Length
131 mm [2]
Diameter
72 mm [2]
Filter thread
67 mm [2]
Closest focus
0.5 m [2]
Maximum magnification
0.139 x [2]
Autofocus
Yes [2]
Optical stabilization
No [2]
Released
2025 [2]

Sources

Missing values are not estimates. Confirm the exact model and mount with the manufacturer before buying. Read our methods, credits and accuracy policy.

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