Proximity Series

InfiniFlex™ HD Compact Lenses

Compact, Powerful and Foolproof HD Imaging

The Flexible Solution!

  • High Resolution
  • No Spacers Needed
  • FOUR Main Bodies and TWO Amplifiers “Do it All”
  • Configure for 2x, 2.5x, 3x, 4x, 5x, 6x, 8x, 10x and 12x
  • Can be Used with Up to 2/3-in. C-mount Cameras/Sensors
  • 20mm Standardized Working Distance
  • Built-in Filter Provision
  • 15mm Diameter Fronts Permit Full Angular Illumination
  • Can Be Used Side-by-side With Our InfiniStix™ Lenses for Unprecedented Magnification Options


Size: 321 KB   Updated: 08/31/2021
• Optical Data
• Magnification Tables
• Instruction Manual
Size: 125 KB   Updated: 12/01/2022
• Price List

InfiniFlex HD imaging lenses are compact microscopes—similar to our own InfiniStix—but designed specifically for use with high resolution cameras. Simply choose one with the magnification most suited to your needs and attach it to any C-mount camera up to 2/3-in. format—to get the highest practical resolution this type of optic can provide, in most cases limited by the camera itself. A high aperture patent pending design assures unprecedented performance with cameras and sensors good enough to take advantage of such imagery presented to them. Excellent results can be achieved from using typical C-mount cameras to benefit from their specifications alone.

Imaging Potentials

We designed the InfiniFlex HD lenses to be amplified up to 120 times their NA rating before they stop producing increased detail. You can use the 2x DL tube to double or the 4x DS Tube to quadruple their powers. Four Main Bodies and two amplifiers allow you to configure most of the magnifications you will likely need.

InfiniFlex 2x PLAN (the fourth version) allows better outer field definition with such a low power. Its advantage is only for that specific purpose. Once a DL or DS amplifier is used with either the standard 2x InfiniFlex or the 2x PLAN InfiniFlex, the results are indistinguishable.

Potential resolution is only that unless light can get in close for full angular (never diffused) illumination. The InfiniFlex HD lenses have 15mm diameter fronts that do not interfere with illuminators. Ring lights can be mounted and moved up and down on the InfiniFlex HD shafts to provide brightfield/darkfield effects—especially recommended for edge detections.

As Flexible as Their Name Implies

The InfiniFlex HD lenses now join Infinity’s two other compact micro lens offerings: InfiniStix™ and InfiniTube™ FM:
InfiniTube FM Series

You are now looking at the InfiniFlex

Over the years, we have had requests to make a higher resolving version of the 18mm working distance/2x InfiniStix lens. That capability was (and still is) available from our InfiniTube FM-Series but the FM-Series do not share dimensions with the InfiniStix. Clearly, there was a need to provide greater potential resolution in a 2x InfiniStix-like configuration. Exploring that, we came upon a patent pending answer: the new InfiniFlex HD line.

InfiniFlex HD Lenses give you the magnifications you want at the HD resolution you need—in an InfiniStix-like housing. The InfiniFlex HD lenses can be used side-by-side with the InfiniStix lenses since they have common dimensions. You can actually put an 18mm/2x InfiniStix next to an InfiniFlex HD 2x to get greater depth of field benefits from the InfiniStix on one camera and greater resolution benefits from the InfiniFlex HD on another.

All InfiniFlex HD lenses have 20mm working distances and the same 0.13 NA. All have built-in holders for 20mm diameter filters—even polarizers—which can be secured by an optional retainer. Above 20mm working distance the regular InfiniStix provide brilliant images. Above or below 20mm working distance, the InfiniTube FM Series can be equipped to the resolution limits of optical microscopy. The new InfiniFlex HD lenses fill this price/performance gap with an InfiniStix-dimensioned housing. Combined in use with the InfiniStix, you have an unprecedented selection of possible magnifications for compatible fixturing.


Now, there is no guesswork, no confusion with calculations and no spacers to contend with. The InfiniFlex HD lenses are made in the USA, are precisely machined from 6061 aircraft grade aluminum, anodized black so that external lighting does not affect their imagery, can stand up to industrial environments and are anti-reflection coated. Just like our InfiniStix, to get brilliant images all you have to do is to:

  1. Choose a Main Body/Amplifier combination to configure 2x, 2.5x, 3x, 4x, 5x, 6x, 8x, 10x or 12x.
  2. Put the configured InfiniFlex HD on any C-mount camera.
  3. Position the InfiniFlex HD 20mm from the object to focus it.

Yes, it is that simple.