What are KESKİN and OGUS-A? The weapon station’s eye
Quick answer: KESKİN-A, KESKİN-B, OGUS-A and EON-S are optronic gunner sight systems developed by FOTONİKS for remote-controlled weapon stations (RCWS). All four share the same basic architecture: a thermal camera, a day camera and a laser rangefinder combined in a single sensor package. That package acts as the “eye” of the weapon station, giving the gunner day-and-night target detection and range data. The systems are positioned for use on manned and unmanned land and naval platforms.
What does the weapon station’s eye do?
On a remote-controlled weapon station, the gunner searches for targets on a screen from inside the vehicle, so the sensor package’s image quality and range measurement directly determine the system’s accuracy. According to the company’s official description, the KESKİN family can serve not only as a gunner sight but also as a fixed surveillance asset for border and coastal security. That dual use allows the same sensor package to work both on a vehicle turret and on a surveillance mast.
Official data for the four systems
The table below reproduces only the figures published on the manufacturer’s pages. For all four products, STANAG 4347 (thermal) and the MRC measurement standard (day channel) are cited as the detection-recognition criteria; the use of these NATO-derived standards is intended to make the values comparable with foreign systems measured by the same method. Numerical detection-recognition ranges have not been officially disclosed for any of the four products.
| Feature | KESKİN-A | KESKİN-B | OGUS-A | EON-S |
|---|---|---|---|---|
| Thermal camera | Cooled, 640×512 | Thermal, 3-5 μm MWIR | Cooled, 640×512 | Cooled |
| Pixel pitch | 15 μm | 12 μm | Not officially disclosed | Not officially disclosed |
| Cool-down time | ≤8 min (25°C) | Not officially disclosed | Not officially disclosed | Not officially disclosed |
| Electronic zoom | Not officially disclosed | 8.0X | Not officially disclosed | Not officially disclosed |
| Frame rate | Not officially disclosed | Not officially disclosed | 1-50 Hz | Not officially disclosed |
| Distinguishing note | Dual RCWS + surveillance use | Lean MWIR configuration | New-generation package | Low-profile housing |
The national technology angle: why does it matter?
Optronic gunner sights are one of the line items where dependence on foreign suppliers has been felt in armoured vehicle and weapon station exports. In a 2021 interview with MSI Turkish Defence Review (MSI TDR), general manager Cem Yazıcıoğlu stressed that products whose design and critical technologies belong to the company are not subject to third-country export licences, and said the company productises in a way that keeps a substantial share of the value chain in-house. In March 2026, sales and marketing manager Altan Bora told Defensehere that the company was producing optical systems and turret weapon system command-and-control units under a tank modernisation programme for a friendly and allied country; the country was not named. The details of that work are examined in the export file.
Products around the family
The KESKİN family is part of the company’s platform-integrated systems category. The same category contains thermal driving cameras for the driver and situational awareness systems that give the crew all-round vision. For long-range surveillance needs, the ATLAS family forms a separate category. EON-S’s low-profile housing is aimed at integrations that reduce the weapon station’s silhouette and centre of gravity; the manufacturer lists integration flexibility with a variety of systems as a feature common to all four.
Frequently asked questions
What is the difference between KESKİN-A and KESKİN-B?
According to the official data, KESKİN-A uses a cooled 640×512 detector with a 15 micron pixel pitch, while KESKİN-B offers a 12 micron pixel pitch in the 3-5 micron MWIR band and 8X electronic zoom. The manufacturer positions the two models for different integration needs.
Which weapon stations use these systems?
The weapon station brands they are integrated on have not been officially disclosed. The company lists land systems manufacturers such as FNSS and UNIDEF among its references; no product-to-platform match could be verified.
What does OGUS-A do differently?
The manufacturer presents OGUS-A as a new-generation sensor package; a cooled 640×512 thermal camera and an adjustable 1-50 Hz frame rate are the main published figures.
Why choose a cooled thermal camera?
Cooled detectors allow detection at longer distances than uncooled ones, at the cost of a cool-down period. For KESKİN-A, the manufacturer quotes that period as up to 8 minutes at 25 degrees Celsius.
Do the systems also work on naval platforms?
The manufacturer positions all four products for manned and unmanned land and naval platforms; no separate configuration details for naval use have been published.
Sources and verification note
- https://www.fotoniks.com.tr/tr/urun/keskin-a — Accessed: August 12, 2026
- https://www.fotoniks.com.tr/tr/urun/keskin-b — Accessed: August 12, 2026
- https://www.fotoniks.com.tr/tr/urun/optronik-nisanci-gorus-sistemi-ogus-a — Accessed: August 12, 2026
- https://www.fotoniks.com.tr/tr/urun/elekto-optik-nisangah-eon-s — Accessed: August 12, 2026
- https://defensehere.com/tr/fotoniksten-fuzyon-termal-kamera-amacimiz-askerin-durumsal-farkindaligini-artirmak/ (March 30, 2026) — Accessed: August 12, 2026
- https://www.savunmahaber.com/en/fotoniks-cem-yazicioglu-10-th-year-anniversary-interview/ (MSI TDR, May 23, 2021; via archived copy) — Accessed: August 12, 2026
Technical values are manufacturer statements. Integration platforms and contracts have not been officially disclosed.
