According to Chipworks, iPhone SE is said to use the front camera of the iPhone 5s with Omnivision sensors, while rear camera without optical image stabilization combined with Sony Exmor RS sensor.
iPhone SE FaceTime front-facing camera, specifically designed to capture high quality selfies. Apple integrates 1.2MP resolution BSI CMOS sensor provided by Ominivision, which is used on the iPhone 5s. This image sensor with 1.75 micron pixel size and camera aperture is f/2.4. Meanwhile, the front camera of the iPhone 6 also has a resolution of 1.2MP, but is provided by Sony and a larger aperture, reaching up to f/2.2.
The rear camera on the iPhone SE features a 12MP resolution with 4K video and live photo features share same ability as iPhone 6s, but no optical image stabilization. The iPhone SE iSight camera uses Sony Exmor RS sensor and 1.22 micron pixel size.