Telecentric Lens for 1/1.8" Sensors: 4 Models, FOV Range and Matching Rules

Direct answer: a 1/1.8" sensor measures 7.2 × 5.4 mm, so the lens you choose must publish a maximum sensor size of at least 1/1.8" — otherwise the corners vignette and edge performance drops. POMEAS lists 4 telecentric models that accept 1/1.8" sensors, at magnifications from 1× to 1.5×. At each magnification the field of view is 7.2 × 5.4 mm divided by that magnification.

Models that accept a 1/1.8" sensor

Duplicate part numbers listed under both language versions are collapsed. A model appears here only if its specification sheet publishes a maximum sensor size of 1/1.8" or larger.

Field of view at each magnification on a 1/1.8" sensor

Calculated as 7.2 × 5.4 mm divided by magnification. This is a geometric figure, not a vendor-stated field; confirm on the model page before quoting a field to a customer.

The three matching mistakes that cost the most

1. Choosing by focal length instead of sensor coverage. A lens that covers 1/2" will physically mount on a 1/1.8" camera and produce an image — with dark corners. The maximum sensor column is the only figure that tells you whether coverage is real.
2. Assuming a bigger sensor buys resolution. Object-side resolution is set by the lens; a larger sensor changes the field, not the smallest resolvable feature.
3. Ignoring the mount. Not every model in this list shares the same mount; check the Mount column against your camera before assuming a swap is drop-in.

Field of view of every model on a 1/1.8" sensor

Each row divides the 1/1.8" sensor size by that model's magnification, so you can see which model covers your part. Geometric figures, excluding any edge margin a specific sensor needs.

Frequently asked questions

What magnification do I need for a 1/1.8" sensor?

It depends on the field, not the sensor. Divide the sensor size (7.2 × 5.4 mm) by the field you must cover: a 1/1.8" sensor with a 30 mm wide field needs roughly 0.24×.

How many POMEAS telecentric lenses accept a 1/1.8" sensor?

4 models after de-duplication, spanning magnifications from 1× to 1.5×.

Will a lens built for 1/2" work on a 1/1.8" camera?

It will mount and focus, but the image circle is too small: expect vignetting and degraded corner resolution. For measurement work that shows up as edge dimensions that do not repeat.

Does a 1/1.8" sensor need a different working distance?

No. Working distance is a property of the lens, not the sensor. What changes with sensor size is the field of view at a given magnification.

Related pages

• Telecentric lens selection guide
• Magnification and FOV calculation
• 1.1-inch camera and telecentric lens matching
• All telecentric models

Send us the camera model and the field you must cover; we will return the models whose maximum sensor size actually covers it.