Ricoh 308938 Zoom #4 Original Projector Lens — Long Throw, 3 Compatible Models

The Ricoh 308938 Zoom #4 is an original (OEM) lens for Ricoh installation projectors. It is a Long Throw lens with a throw ratio of 4.70-7.20:1. This article compiles its 3 compatible projector models, optical specifications, and purchasing considerations for quick compatibility verification by machine model.

Specifications

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

308938 Zoom #4 Compatible Model List (3 Models, with Brightness/Resolution)

The following are verified compatible models for the 308938 Zoom #4, each with brightness and resolution; the applicable lens model for all is 308938 Zoom #4:

Note: Brightness/resolution data is taken from the model database (refer to the unit's nameplate/user 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

Ricoh 308938 Zoom #4 Lens

The 308938 Zoom #4 is a Long Throw lens manufactured by Ricoh as an OEM product. Its optical structure, lens coatings, and body tolerances are all matched to original machine standards, ensuring plug-and-play installation and stable imaging. For installation environments with limited projection distance (e.g., short-distance large images, ultra-short throw against walls), choosing the correct throw ratio is more critical than opting for a generic lens.

This lens has a throw ratio of 4.70-7.20:1. 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 greater 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 Ricoh original lens 308938 Zoom #4 through authorized channels, complete with original packaging and traceable serial numbers, suitable for bulk procurement and project supply in installation projectors, conference rooms, classrooms, and other applications.

• Genuine Product Guarantee: Sourced through official OEM channels, with original packaging and serial numbers; bulk projects can request channel documentation to ensure no refurbished or unverified units.
• Compatibility Verification: Provide the projector model before ordering, and Zorsika technical support will confirm against the compatible model list above to avoid installation issues.
• Project Supply: The 308938 Zoom #4 covers 3 models; common projects can be scheduled in advance to shorten lead times.
• Alternative Options: If budget-sensitive, Zorsika also offers equivalent replacement lenses with key specifications matched to OEM standards, available as needed.

Note: Actual imaging performance is affected by projector condition and installation environment; for large orders, it is recommended to test one unit first.

FAQ

Q: How do I choose between an original lens and a replacement lens?

A: Original lenses are manufactured by Ricoh with optical parameters and body tolerances calibrated to the original machine, 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 machine, offering advantages in budget and lead time. Zorsika can supply 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; this article lists verified compatible models. Projectors of the same generation and brand often share mounts; if unsure, photograph the unit's 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. A smaller value produces a larger image (short-throw/ultra-short-throw suits close-range small spaces), while a larger value requires a greater 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 is the 308938 Zoom #4 guaranteed to be genuine?

A: Zorsika supplies genuine products through OEM channels, with original packaging and traceable serial numbers; bulk projects can request channel documentation to ensure they are not refurbished or second-hand units.

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

A: Before removal, ensure the projector is powered off and the cooling fan has stopped; 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; for normal use and non-man-made damage (e.g., impact, water ingress, unauthorized disassembly), contact after-sales service directly; the warranty period is based on the shipping document 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 Ricoh original lens 308938 Zoom #4, project solutions, or a complete compatible model list, please contact us via:

• 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 model data in this article are sourced from OEM documentation and the Zorsika product database; data is continuously updated and subject to confirmation at the time of inquiry.