ROLY T5 Short Fixed Lens Guide: RL-E5U RL-E5W RL-E6Q RL-E6U RL-E6W RL-E7Q RL-E7U RL-M85Q RL-M85U

ROLY Genuine Lens T5 Short Fixed is an OEM optical accessory for ROLY engineering projectors, with a short throw ratio of 0.50:1. The factory compatibility list covers 9 projector models; before installation, simply verify the projector model and panel size, with no adapter-ring workaround required. The value of an OEM lens lies not in the additional rows of figures in the specifications, but in the fact that it is calibrated at the factory to the optical path and mount of the corresponding projector series. Once installed, the image circle, edge illumination, and focus travel all meet their design values, eliminating the need to use keystone correction to compensate for image quality.

1. Lens Specifications

The above specifications are subject to the manufacturer's original specifications. For mechanical dimensions, flange distance, and mount type not listed in the specifications table, please contact us to verify them based on the projector model. Ordering based solely on a similar model carries the risk of an incompatible fit.

2. Installation Distance by Throw Ratio

The throw ratio is the ratio of installation distance to image width. This OEM lens has a fixed focal length (0.50:1), so the installation distance changes linearly with image size, with no adjustment margin. Accurate measurements are essential before installation.

These figures represent the clear distance from the front surface of the lens to the screen and do not allow for ventilation or cable connections at the rear of the projector. Calculated for a 16:10 image; actual values should be confirmed through on-site measurement and the manufacturer's manual.

3. Compatible Projector Models (9 Models)

The table below is taken from the manufacturer's compatibility list. Brightness and resolution are populated from the model database; unavailable values are shown as — and are not estimated.

For compatibility with a model not on the list, send us photos of the projector nameplate and the existing lens for verification. Projector platforms from the same generation often share the same mount, but ordering based only on a similar model is not worth the risk.

Throw Ratio by Projector Series

The nominal throw ratio of the same T5 Short Fixed lens varies across the series listed below. When selecting a lens, use the value for the series to which the actual projector belongs.

4. Three Checks Before Replacement

• Confirm the projector imaging chip and resolution. The OEM lens is designed for a specific panel size. If the panel specification differs, the image circle cannot cover the full image, causing vignetting or light loss at the edges after installation.
• Calculate the installation distance first. This lens has a nominal throw ratio of 0.50:1. Use the table in Section 2 to calculate the distance for your installation space. A fixed-focal-length lens has no adjustment margin; even with a zoom lens, allow an additional 10–20 cm at both ends.
• Verify the mount and locking mechanism. The OEM lens is calibrated to the mount of the corresponding projector series. After installation, it must audibly lock into place. A skewed image or soft edges usually indicate that the lens is not fully locked, rather than a problem with the lens itself.

If you are unsure, send us one photo of the projector nameplate and one of the nameplate on the existing lens. Verification against the actual equipment is the safest approach.