I have a Canon EOS 2000D DSLR. I recently tested its flash. Gives ugly shadows, but that is easily remedied by turning a low-cost white A4 paper into a flash diffuser.
However, the power of the flash is not that great. Thus, I have been planning to purchase a removable flash for the camera.
I also tested the red-eye prevention feature of the DSLR. It works excellently, even without the A4 paper diffuser. Apparently, the flash fires once before the main flash, and this causes the iris of the eye to close, thus preventing red eyes.
Now, if I purchase a removable E-TTL II flash, will the pre-flash red-eye prevention work also with the removable flash?