2× Telecentric Lens: 10 POMEAS Models, FOV and Selection Rules

Direct answer: at 2×, a telecentric lens maps a 4.40 × 3.30 mm field onto a 2/3" sensor (8.8 × 6.6 mm), because field of view equals sensor size divided by magnification. POMEAS lists 10 models at this magnification, with working distances from 40 mm to 150 mm and stated object-side resolutions from 2.2 μm to 13.4 μm. Choose 2× when your critical features fit inside that field and your smallest feature is at or above the stated resolution; move up to a higher magnification when you need more object-side resolution over a smaller field.

All 2× telecentric lenses in the POMEAS catalogue

10 models after removing duplicate listings of the same part number across language versions. Distortion and telecentricity values are quoted exactly as published on each model page; where a cell says "not stated", the specification sheet does not publish that figure and we do not estimate it.

Field of view at 2× for each sensor size

These figures are geometric: FOV = sensor width (or height) ÷ magnification. They are not vendor-stated field values, and they do not account for the small usable-area margin some sensors require. For the vendor-published FOV of a specific model, use the FOV rows on that model page.

What resolution and distortion to expect at 2×

Across the 10 models at this magnification, stated object-side resolution spans 2.2 μm to 13.4 μm and the largest published TV distortion is 0.05%. Resolution here is the object-side value the lens can deliver, not the pixel size of your camera; if your camera's object-side pixel is larger than the lens resolution, the camera sets the limit.

Object-side telecentricity is published for 1 of the 10 models at this magnification; for the others the specification sheet does not state it. If your measurement uncertainty budget depends on a telecentricity figure, pick a model that publishes one rather than assuming a value.

When 2× is the right magnification

• Your part's critical dimensions fit inside a 4.4 × 3.3 mm field on a 2/3" sensor.
• The smallest feature you must resolve is at or above 2.2 μm, the finest resolution in this group.
• You need a shorter working distance than the higher-magnification models allow — this group spans 40 mm to 150 mm.

When to step to an adjacent magnification instead

• If your field is larger than 4.4 × 3.3 mm, a lower magnification gives the same sensor more coverage.
• If your smallest feature is below 2.2 μm, a higher magnification is required — a larger sensor will not fix a lens that cannot resolve the feature.
• If part height varies by more than the stated depth of field, check the DOF column before committing; DOF shrinks as magnification rises.

Field of view for every model in this group

Each row divides that model's published maximum sensor size by its magnification, so you can see at a glance which model covers your part. These are geometric figures, not vendor-published FOV, and they exclude any edge margin a specific sensor needs. For a smaller sensor, scale down by the same ratio.

Frequently asked questions

What field of view does a 2× telecentric lens give on a 2/3" sensor?

It gives 4.40 × 3.30 mm, calculated as 8.8 × 6.6 mm divided by 2. On a 1/2" sensor the same lens gives 3.20 × 2.40 mm.

How many 2× models does POMEAS offer and how do they differ?

This page lists 10 distinct part numbers at this magnification. They differ mainly in working distance (40 mm to 150 mm), stated resolution (2.2 μm to 13.4 μm), maximum sensor size and whether telecentricity is published.

Is a 2× telecentric lens enough to measure a 0.1 mm feature?

Check the resolution column. The finest stated resolution in this group is 2.2 μm; if your feature is smaller than roughly three times that value, measurement repeatability will be dominated by the lens. Move to a higher magnification instead of relying on software.

Does the working distance change the magnification?

No. A telecentric lens holds magnification constant over its depth of field. That is the property that separates it from a standard FA lens, where moving the object changes magnification and therefore every measured dimension.

Can I use a 2× lens with a 1" sensor?

Only if the model's maximum sensor size is at least 1". Check the Max sensor column: using a larger sensor than the lens supports produces vignetting and degrades edge performance rather than extending the field.

Related pages

• Telecentric lens selection guide: magnification, FOV, WD and measurement accuracy
• How to calculate telecentric magnification and field of view
• What is a telecentric lens: working principle and types
• All telecentric lens models by category

If you are choosing between two magnifications for a specific part, send the sensor size, the field you must cover and your tolerance; we will return the candidate models and the object-side resolution each one gives you.