Sirui Astra Series 50/75/100mm T1.8 Full-frame AF Anamorphic Cine Lens Kit (Z Mount, Blue Flare)
The Sirui Astra Series 50mm, 75mm and 100mm T1.8 is a full-frame anamorphic cine lens kit built around a constant 1.33x squeeze and fast autofocus. Designed to restore a 2.35:1 widescreen image from 16:9 capture without cropping, the set keeps colour and contrast consistent across focal lengths. The T1.8 aperture and blue-flare tuning deliver a recognisable anamorphic look while remaining practical for small crews and solo operators.
Sirui Astra Cine Lens Kit Key Features:
- Three-lens anamorphic set covering 50mm, 75mm and 100mm
- Constant 1.33x squeeze restores 2.35:1 image from 16:9 capture
- Fast T1.8 aperture supports low light and shallow depth of field
- 18-element optical design helps maintain consistent rendering
- Full-frame 44mm image circle for modern mirrorless sensors
- Autofocus with STM motor improves speed for small crews
- Uniform colour and contrast across the full focal range
- Identical gear positions support quick lens swaps
- Oval bokeh and vertical stretch create a classic anamorphic look
- Distinctive anamorphic flare rendering defines cinematic character
- Matching 67mm filter threads across all lenses
FAQs
Do these lenses cover full-frame sensors?
Yes. Each lens uses a 44mm image circle that fully covers the image circle of full-frame mirrorless sensors. This allows the anamorphic image to fill the sensor without vignetting, while maintaining consistent squeeze and character across the frame.
How does the autofocus behave in video shooting?
The STM autofocus motor is tuned for smooth, controlled focus movement rather than sudden jumps. This suits tracking subjects or holding focus during handheld and gimbal work, especially for operators working without a focus puller.
What changes between the blue flare and neutral flare versions?
The difference lies in how the lenses render backlit highlights. One version produces a more pronounced coloured horizontal flare, while the other keeps the flare more restrained and neutral, without changing sharpness, squeeze ratio or handling.
Can I use these lenses with follow focus and matte box setups?
Yes. Identical gear positions across the set simplify follow focus alignment, and consistent outer dimensions make clamp-on matte boxes more straightforward to use. Matching filter threads also makes front filtration straightforward when a matte box is not required.
Is this kit suitable for solo operators?
Yes. Autofocus, consistent handling and a fast T1.8 aperture make the Astra Series far easier to manage solo than traditional anamorphic lenses, while still delivering a true widescreen cinematic image.
Product Specification
| Aperture Blades | 11 (50mm) 13 (75mm, 100mm) |
| Autofocus Motor | STM |
| Colour | Black |
| Enlargement Ratio | Up to approx. 1:7.2 (varies by focal length and axis) |
| Filter Thread [mm] | 67 |
| Focal Length ~ Tele [mm] | 100.0 |
| Focal Length ~ Wide [mm] | 50.0 |
| Lens Elements | 18 |
| Lens Groups | 14 |
| Lens Mount | Nikon Z |
| Lens Type | Prime Cine Lens |
| Max Aperture ~ Tele | 1.8 |
| Max Aperture ~ Wide | 1.8 |
| MF Switch | Yes |
| Minimum Aperture | 22 |
| Minimum Focus Distance [m] | 0.50 |
| Size | Length: 133mm / 133mm / 137.3mm |
| Tele~Converter Compatibility | No |
| Weight [g] | 2018.00 |
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with a choice of repayment plans over 24 or 36 months 13.9% APR (representative)Buy now pay later
36 month loan with a six month deferral period, 18.9% APR (representative)Interest Bearing Finance
This option comprises term loan with a choice of repayment plans over:
- 24 months
- 36 months
The balance of the finance agreement is payable directly to Novuna Consumer Finance in equal monthly instalments by monthly direct debit. The direct debit payments will commence at the end of the first month following receipt of your goods. The interest rate charged is 13.9% APR (representative). Late payment and early repayment penalties apply; full details of these will be provided in the loan agreement pack.
For customers based in the Channel Island, please call us to apply for finance
| 24 Months | 36 Months | |
|---|---|---|
| Cash price | £2,639.00 | £2,639.00 |
| Deposit | £0.00 | £0.00 |
| Loan Amount | £2,639.00 | £2,639.00 |
| Monthly Instalment | 23 x £125.56 | 35 x £89.02 |
| Final Instalment | £125.56 | £89.02 |
| Total Amount Repayable | £3,013.44 | £3,204.72 |
| Representative | 13.9% APR | 13.9% APR |
Buy now pay later
The Buy Now Pay Later option comprises a 36 month loan following a six month deferral period.
During the six-month deferral period, it is possible to pay off the loan, either by way of a lump sum or in smaller amounts. If the loan is partially repaid within six months, the remaining interest will be adjusted to reflect the new balance. If the loan is fully repaid within the six-month deferral period, then no interest is payable, however, a £29 early settlement fee is payable in respect of repayments within these six months.
Following the six-month deferral period, Novuna Personal Finance will initiate a monthly direct debit payment for the remaining duration of the loan. Interest will be charged at a rate of 18.9% APR (representative) on outstanding balances (backdated to the first date of the loan). Novuna Personal Finance will send a reminder letter approximately one month before the six-month deferral period is due to elapse.
For customers based in the Channel Island, please call us to apply for finance
| Balance settled in full within the six month deferral period | Balance NOT settled in full within the six month deferral period | |
|---|---|---|
| Cash price | £300 | £300 |
| Deposit | £0 | £0 |
| Loan Amount | £300 | £300 |
| Settlement fee | £29 | £0 |
| Settlement payment | £329 | - |
| Monthly Instalment | - | 36 x £11.57 |
| Total Amount Repayable | £329 | £416.52 |
| Representative | 18.9% APR | 18.9% APR |