Pay in installments of $65.50 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
SIRUI 18°-36° Stepless Zoom Projector Lens for COB LightSince SIRUI began to produce lights, bendable lights, self inflating lights, tube lights, monolights, panel lights and light accessories have come into the market. Now, SIRUI launches one new lightweight product P1836A Projector Zoom Lens, which can be mounted on COB light to provide users with amazing lighting effects, suitable for photographer, studio and lighting designer to operate flexibly and creatively. With the advanced optical design
Since SIRUI began to produce lights, bendable lights, self-inflating lights, tube lights, monolights, panel lights and light accessories have come into the market.
Now, SIRUI launches one new lightweight product - P1836A Projector Zoom Lens, which can be mounted on COB light to provide users with amazing lighting effects, suitable for photographer, studio and lighting designer to operate flexibly and creatively.
With the advanced optical design technology, you no longer need to change lenses! The 18° - 36° stepless zoom lens allows you to fast and accurately control the light by smoothly rotating the focus adjusting twist lock with only one hand. This helps you change the angle and focus of the light, making it easy to change the shape of the light within the same distance.
Users don't have to purchase the aperture. Just mount this lens on the monolight to change light size and sharpness smoothly and naturally, which brings you efficient and convenient shooting experience.
Spot Size Adjustment
Focus Change
*Tighten the locking focus knob to prevent focus from being changed accidentally.
Thanks to SIRUI’s mature optical technology, it adopts integrated sealing design to this projector lens, making the lens extremely compact, only 1.7kg.
Other Brand
P1836A
Film
Live Streaming
Portrait
Creative Shooting
This projector lens can be mounted on a light stand to increase stability via one mini lens support with 1/4"-20 threaded hole when this lens is used with a small and lightweight light.
*P1836A projector lens works well with COB light which is below 200W. It is suggested to turn down the light if the power is above 200W. Or, the projector lens may be damaged.
Compact and portable lens for easy transport, ideal for indoor and outdoor shooting. This lens can also be flexibly operated even in narrow situations.
1/4”-20 threaded hole
This lens can also be flexibly operated even in narrow situations.
Designed with precise optical lens and low reflection lens coating technology, this projector lens helps correct chromatic aberration and further increase resolution and sharpness and also reduce distortion. Besides, this lens can project more than 98% even light and sharp clear shadow.
Uniformity of Light Spot
% Relative Illumination
Relative Illumination - 3m
Real Chief Ray Image Height (mm)
Zoom Position 1
Uniformity of Light Spot
% Relative Illumination
Relative Illumination - 3m
Real Chief Ray Image Height (mm)
Zoom Position 1
Strong aluminum alloy construction lens with heat-protective design and hollow design helps dissipate heat efficiently. When working with lights under 200W, the built-in heat dissipation system makes the temperature of this lens cover lower than similar products, which prevents your hands from being scalded when you are operating. And it makes the light system work normally, too.
*Please turn off the light first and detach the lens until the lens cools.
Strong Aluminum Alloy Construction
P1836A+CS200B
Compared with similar products, the data shows that temperature of SIRUI P1836A rises less and the heat dissipation is better, which is safer.
*The data above comes from SIRUI laboratory.
Four grooves are designed for easily inserting included shutter blades to cut or shape the light projected on the subject. And the fixed design shutter blades suit the grooves well.
Users can choose from 15 pieces of GOBO patterns and insert different GOBO patterns to the light to create various fantastic lighting effects, making the background rich.
Besides, the non-contact installation of GOBO patterns provides you with great convenience.
The GOBO pattern can be rotated freely, allowing you to get ideal and excellent lighting angle.
Three filters are included - red, yellow and blue. It is possible to mount the filter on the 72mm threaded mount of this projector lens to offer colorful lighting effects and make shooting creative.
This projector lens works well with COB light under 200W. It is suggested to mount this lens on SIRUI Blaze Series Monolight or CS Series Monolight to create brilliant images.
Gobo Holder
Shutter Blade
Bowens Mount
Heat Exhaust Fan
Focusing
Lens Tube
Zoom Ring
Name of Part
Specifications
Name
18° - 36° Projector Lens
Brightness
Improvement
Improvement
18 °: 2.69x / 36 °: 1.14x
Lens Aperture
Ø68mm
Field of View
18°~36°
Relative Illumination
@0.9 Field
@0.9 Field
18 °: ≥90% / 36 °: ≥50%
CCT Accuracy
>95%
Maximum Focusing Distance
>5m
Minimum Focusing Distance
<1m
Filter
72mm
Mount Type
Bowens Mount
Weight
1706g/3.8lb
Dimensions
305mm*157mm*118mm
12.0in*6.1in*4in
12.0in*6.1in*4in
Materials
Metal + Plastic
Surface Temperature
≤60° (With SIRUI 200W Light)
Storage Temperature
-20~60℃
Working Temperature
-10~40℃
Work with SIRUI CS200B, CCT 2800K/3200K/4300K/5600K/6500K
Data of Illuminance@1m/3m/5m
Data of Illuminance@1m/3m/5m
*The data above comes from SIRUI laboratory.
What's in the Box
Lens Only
① Projector Lens *1
② GOBO Holder *1
③ GOBO Pattern *15
④ Filter *3
⑤ Safety Box *1
⑥ Warranty Card *1
Kit
① Projector Lens *1
② GOBO Holder *1
③ CS200B *1
④ GOBO Pattern *15
⑤ Filter *3
⑥ Safety Box *1
⑦ Warranty Card *1
Lightweight safety box featuring anti-shock, pressure resistance and chemical resistance is designed to protect your projector lens during transport.
What's in the Box
Lightweight safety box featuring anti-shock, pressure resistance and chemical resistance is designed to protect your projector lens during transport.
Lens Only
① Projector Lens *1
② GOBO Holder *1
③ GOBO Pattern *15
④ Filter *3
⑤ Safety Box *1
⑥ Warranty Card *1
Lightweight safety box featuring anti-shock, pressure resistance and chemical resistance is designed to protect your projector lens during transport.
Kit
① Projector Lens *1
② GOBO Holder *1
③ CS200B *1
④ GOBO Pattern *15
⑤ Filter *3
⑥ Safety Box *1
⑦ Warranty Card *1
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 19 reviews
Sort
Product Reviews
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well.
Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely.
One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs.
The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers.
Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster.
Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality.
Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option.
There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk.
Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine.
The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two).
In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 5
Nice divider, serves it's purpose well!
Size: 3 Panel 12FT W
This room divider worked out very well for what I needed. I wanted a simple way to create a little more privacy and separation in a larger room without doing anything permanent, and this divider was an easy solution. The panels provide good coverage, and the black color gives it a clean, modern appearance that blends in nicely with different décor styles.
Assembly was fairly straightforward, and once set up, the wider feet helped keep the divider stable on the floor. I was especially happy with how flexible the panels are to arrange. You can keep it mostly straight, angle it around furniture, or create a more enclosed private space depending on the layout you need.
The material allows light to filter through slightly while still offering a noticeable sense of privacy. I’ve used it for separating a workspace area, but it would also work well in bedrooms, apartments, dorms, studios, or shared living spaces. Another plus is that it can be folded and moved without too much effort when you want to change the setup.
Overall, this divider delivers a good balance of functionality, portability, and appearance. It’s a practical option for anyone needing temporary room separation without installing permanent walls or curtains.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
recommand products
British Unit Card Pack (36 cards)
13.50
Retroactive 2.0 in Leaden 3"x12" Polished
10.00
Roll-N-Lock 19-22 Chevrolet Silverado 1500 (w/o Carbon Pro - 69.9in.) E-Series XT Retractable Cover
1299.99
Retroactive 2.0 in Featherstone 6"x24" Unpolished
10.00
Retroactive 2.0 in Phantom 6"x24" Polished
10.00