At a glance
- Specifications
- BX-CTA11 Short Zoom Compatible Projector Models (3 models, with brightness/resolution)
- About This Original Lens
- Genuine Product and Purchasing Information
- FAQ
- Q: How do I choose between an original lens and a replacement lens?
- Q: How can I confirm this lens works with my projector?
- Q: How do I select the throw ratio?
- Q: How can I ensure the BX-CTA11 Short Zoom is genuine?
- Q: What should I pay attention to when replacing the lens?
- Q: What is the warranty period for the lens?
- Related Inquiry Links
- Purchasing Inquiries
Optoma original lens BX-CTA11 Short Zoom, standard throw, throw ratio 0.78-0.90:1, compatible with 3 Optoma projectors: ZK1000, ZK1120, ZK1320. Genuine supply, bulk orders for projects.
The Optoma BX-CTA11 Short Zoom is an original (OEM) lens for Optoma installation projectors, belonging to the standard throw category with a throw ratio of 0.78-0.90:1. This article compiles its 3 compatible projector models, optical specifications, and purchasing considerations for quick compatibility verification by projector model.

Specifications
| Lens Model | BX-CTA11 Short Zoom |
| Brand (OEM) | Optoma (Optoma) |
| Throw Ratio | 0.78-0.90:1 |
| Product Type | Standard Throw |
| Number of Compatible Models | 3 models |
| OEM Product Page | Optoma Official Introduction |
The above specifications are sourced from OEM documentation and the Zorsika product database; full technical datasheets are available upon request from our sales team.
BX-CTA11 Short Zoom Compatible Projector Models (3 models, with brightness/resolution)
The following are verified compatible projector models for the BX-CTA11 Short Zoom, each with brightness and resolution; the compatible lens model for all is BX-CTA11 Short Zoom:
| Projector Model | Brightness | Resolution | Lens Model |
|---|---|---|---|
| ZK1000 | 10000 lumens | 3840x2400 | BX-CTA11 Short Zoom |
| ZK1120 | 11500 lumens | 4K (3840×2160) | BX-CTA11 Short Zoom |
| ZK1320 | 13500 lumens | 4K (3840×2160) | BX-CTA11 Short Zoom |
Note: Brightness/resolution are taken from the model database (refer to the unit nameplate/manual for accuracy); lens compatibility is determined by the projector's lens mount and panel/chip size. For models not listed, please contact Zorsika technical support for confirmation.
About This Original Lens
Optoma BX-CTA11 Short Zoom Lens
The BX-CTA11 Short Zoom is a standard throw lens manufactured by Optoma as an OEM product. Its optical structure, lens coatings, and body tolerances are all matched to original projector standards, ensuring plug-and-play installation and stable imaging. For installations with limited projection distance (e.g., short-distance large images, wall-mounted ultra-short throw), selecting the correct throw ratio is more critical than choosing a generic lens.
This lens has a throw ratio of 0.78-0.90:1. Throw ratio = projection distance ÷ image width: a smaller value produces a larger image (ideal for short distances in small spaces), while a larger value requires a longer installation distance. Calculate the required throw ratio range based on your installation distance and screen size, then match it to this model.
Genuine Product and Purchasing Information
Zorsika supplies genuine Optoma original lenses BX-CTA11 Short Zoom through authorized channels, complete with original packaging and traceable serial numbers, suitable for bulk procurement and project supply for installation projectors, conference rooms, classrooms, and more.
- Genuine Guarantee: Sourced through official OEM channels, with original packaging and serial numbers; channel documentation can be requested for bulk projects to eliminate refurbished or unverified units.
- Compatibility Verification: Provide your projector model before ordering, and Zorsika technical support will verify against the compatible model list above to ensure a proper fit.
- Project Supply: The BX-CTA11 Short Zoom covers 3 projector models; common projects can be scheduled in advance to shorten lead times.
- Alternative Options: For budget-sensitive needs, Zorsika also offers equivalent replacement lenses with key specifications matched to the OEM, allowing you to choose as needed.
Note: Actual imaging performance is affected by projector condition and installation environment; it is recommended to test one unit before large-volume orders.
FAQ
Q: How do I choose between an original lens and a replacement lens?
A: Original lenses are manufactured by Optoma, with optical parameters and body tolerances calibrated to original standards, ideal for projects with strict OEM consistency requirements; Zorsika replacement lenses are independently designed and manufactured to the same specifications, with throw ratio, image circle, and mount matched to the original, offering advantages in budget and lead time. Zorsika supplies both options—choose based on your project requirements.
Q: How can I confirm this lens works with my projector?
A: Refer to the projector's lens mount and panel/chip size; this article lists verified compatible models. Projectors of the same generation and brand often share mounts—if unsure, send a photo of the nameplate to Zorsika technical support for confirmation.
Q: How do I select the throw ratio?
A: Throw ratio = projection distance ÷ image width. A smaller value produces a larger image (short throw/ultra-short throw suits close-range small spaces), while a larger value requires a longer installation distance. Calculate the required throw ratio range based on installation distance and screen size, then match it to this model's focal range.
Q: How can I ensure the BX-CTA11 Short Zoom is genuine?
A: Zorsika supplies genuine products through OEM channels, with original packaging and traceable serial numbers; channel documentation can be requested for bulk projects to ensure they are not refurbished or used units.
Q: What should I pay attention to when replacing the lens?
A: Power off the projector and wait for the cooling fan to stop before disassembly; hold the lens barrel without touching the glass, use a blower for dust; after installation, test focus before tightening the locking screws, and clean the mount and contacts as you go.
Q: What is the warranty period for the lens?
A: Zorsika provides a 12-month warranty on all projector lenses; normal use and non-manual damage (e.g., impact, water ingress, unauthorized disassembly) can be handled directly through after-sales service, with the warranty period starting from the shipping date.
Related Inquiry Links
- Zorsika Technical Support Center
- Projector Brand and Compatible Model Lookup
- Projector Lamp / Lens / Air Filter Product Library
Purchasing Inquiries
For solution consultations, project proposals, or the full compatible model list for the Optoma original lens BX-CTA11 Short Zoom, contact us via:
- Website: www.zorsika.com
- Phone: 0086-20-38551187
- Email: sales@zorsika.com
- Business Hours: Monday to Friday, 9:00-18:00
Lens model and compatible projector data in this article are sourced from OEM documentation and the Zorsika product database, subject to continuous updates; final confirmation is based on actual inquiries.