SC37- Projector Lens 1.49–2.29:1 for 2 ViewSonic Models: SML-L2000U L2300U

SC37- is a medium-to-long-throw lens for engineering projectors (SIMBAL), with a throw ratio of 1.49–2.29:1 and lens shift. It is compatible with 2 models from 1 model series. This article presents the lens specifications, installation distances, model compatibility list, and key replacement considerations in one place.

1. Lens Specifications

Lens-shift capability is the key differentiator of this lens. The horizontal 0 and vertical 0 shift ranges mean that the projector can be installed off the screen’s center axis and the image can be brought back into alignment using lens shift, without relying on keystone correction. Keystone correction comes at a cost—each adjustment sacrifices some effective pixels, causing text edges to appear blurred. In professional installations, never resort to keystone correction when lens shift can solve the alignment issue; protecting image quality is non-negotiable.

2. Converting Throw Ratio to Installation Distance

The throw ratio is the installation distance divided by the image width. This is a zoom lens (1.49–2.29:1), so a given image size corresponds to a range of distances, and it can be focused at any point within that range during installation.

The figures above represent the clear distance from the front surface of the lens to the screen and do not allow for cooling clearance or cable connections behind the projector. They are calculated for a 16:10 aspect ratio; actual values should be verified by on-site measurement and against the manual.

Image quality varies across the zoom range: near the short-throw end, the image is brighter and the edges are slightly softer; near the long-throw end, the edges are sharper and brightness decreases slightly. Where the venue allows, aim for the middle of the range. After installation, first find the sharpest position using the focus ring, then fine-tune the lens shift—adjusting both variables at once makes precise alignment difficult.

3. Compatible Models (2 Models, SIMBAL)

The table below is ordered by model production date, from newest to oldest, and lists the resolution, brightness, and zoom ratio of each model’s standard factory lens to make it easy to identify the right option for your project requirements.

The zoom ratio is the zoom factor of the model’s standard factory lens (the upper limit of its factory throw-ratio range ÷ the lower limit), not the zoom range of the lens featured in this article.

Common Features of These Models

The standard factory lenses for these 2 models mostly fall within the 1.18-1.9:1 throw-ratio range. The 1.49–2.29:1 ratio of the model featured here effectively changes the focal range, allowing a different image size at the same projection distance—the direct reason for replacing the lens. It also retains full lens-shift capability, so the image can still be aligned after the focal range is adjusted.

4. Three Checks Before Replacement

• Panel size must be verified. Panel specifications for this model are not yet available. Please send us a photo of the projector nameplate for confirmation.
• Interfaces and locking mechanism. Interfaces are generally compatible across platforms of the same generation, but the position of the locking latch varies by generation. If the image is skewed or the edges are soft after installation, the lock is usually not fully engaged; this is not an issue with the lens itself.
• Lens-shift margin must be factored into the installation. The shift range provides some installation flexibility, but edge image quality declines at the limits. For actual use, keep operation within 70% of the rated value.

For models not listed here, the safest approach is to send us photos of the projector nameplate and original lens for verification. Platforms of the same generation often share the same interfaces, but the risk of ordering based on a similar model number is not worth taking.