Optoma BX-CTA21 Standard Zoom Original Projector Lens - Standard Throw, 9 Compatible Models

The Optoma BX-CTA21 Standard Zoom is the original (OEM) lens for Optoma installation projectors. It belongs to the standard throw category, with a throw ratio of 1.50-2.00:1. This article compiles its 9 compatible projector models, optical specifications, and purchasing considerations for quick compatibility verification by projector model.

Specifications

The above specifications are sourced from OEM documentation and the Zorsika product database; a full technical datasheet is available upon request from our sales team.

BX-CTA21 Standard Zoom Compatible Projector Models (9 models, with brightness/resolution)

The following are verified compatible projector models for the BX-CTA21 Standard Zoom, each with brightness and resolution; the compatible lens model for all is BX-CTA21 Standard Zoom:

Note: Brightness/resolution are taken from the model database (refer to the nameplate/user manual for final confirmation); lens compatibility is determined by the projector's lens mount and panel/chip size. For models not listed, contact Zorsika technical support for verification.

About This Original Lens

Optoma BX-CTA21 Standard Zoom Lens

The BX-CTA21 Standard Zoom is a standard throw lens manufactured by Optoma. Its optical structure, lens coatings, and body tolerances are matched to original projector standards, ensuring plug-and-play installation and stable imaging. For installation environments with limited projection distance (e.g., short-distance large images, wall-mounted ultra-short throw), choosing the correct throw ratio is more critical than selecting a generic lens.

This lens has a throw ratio of 1.50-2.00:1. Throw ratio = projection distance ÷ image width: the smaller the value, the larger the image (ideal for short distances in small spaces); the larger the value, the greater the installation distance required. Calculate the required throw ratio range based on your installation distance and screen size, then match it to this model.

Genuine Products and Purchasing Information

Zorsika supplies the genuine Optoma original lens BX-CTA21 Standard 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 other applications.

• Genuine Guarantee: Sourced through official OEM channels, with original packaging and serial numbers; channel certificates 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-CTA21 Standard Zoom covers 9 projector models; common projects can be scheduled in advance to shorten lead times.
• Alternative Options: For budget-sensitive projects, Zorsika also offers equivalent replacement lenses with key specifications matched to the original, allowing you to choose as needed.

Note: Actual imaging performance is affected by projector condition and installation environment; we recommend testing 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 specifications, ideal for projects with strict requirements for OEM consistency. 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: Compatibility is determined by the projector's lens mount and panel/chip size; verified compatible models are listed in this article. Projectors of the same generation and brand often share the same mount. If unsure, take a photo of the nameplate and send it to Zorsika technical support for confirmation.

Q: How do I choose the throw ratio?

A: Throw ratio = projection distance ÷ image width. The smaller the value, the larger the image (short throw/ultra-short throw suits small spaces at close range); the larger the value, the greater the installation distance required. 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 be sure the BX-CTA21 Standard Zoom is genuine?

A: Zorsika supplies genuine products through OEM channels, with original packaging and traceable serial numbers; channel certificates can be requested for bulk projects to ensure the lens is not refurbished or a used pulled part.

Q: What should I pay attention to when replacing the lens?

A: Always power off the projector and wait for the cooling fan to stop before removal/installation; 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-man-made damage (e.g., impact, water ingress, unauthorized disassembly) can be handled directly through after-sales service. The warranty period is based on the shipping invoice date.

Related Inquiry Links

• Zorsika Technical Support Center
• Projector Brand and Compatible Model Lookup
• Projector Lamp / Lens / Air Filter Product Library

Purchasing Consultation

For consultation on the Optoma original lens BX-CTA21 Standard Zoom, project solutions, or the full compatible model list, contact us through the following channels:

• Website: www.zorsika.com
• Phone: 0086-20-38551187
• Email: sales@zorsika.com
• Business Hours: Monday to Friday, 9:00-18:00

The lens model and compatible projector data in this article are sourced from OEM documentation and the Zorsika product database; data is continuously updated and subject to final confirmation upon inquiry.