This is the APO TELE ZOOM 100-300mm, a legendary lens from Minolta's film camera era. After acquiring it used, I used it for a while with an α57, and it worked without any problems. The drawbacks are that the front element has cleaning marks, coating peeling, and dirt. This may affect the image quality depending on the conditions. The flash had rust in the battery compartment due to battery leakage when I got it, but after cleaning the contacts, it powered on, and I was able to confirm it fired with the α57. It's an old model, probably from the second generation of α cameras, so it doesn't have automatic flash control with digital SLRs and requires manual settings. However, it has fine power adjustment and the flash angle can be adjusted not only up and down but also left and right, so it's quite functional if used manually. However, whether it's due to the specifications or its age, it takes a little while for the power to turn on after inserting the batteries, and there are some instabilities, such as the power briefly cutting out due to poor contact when moved up and down, which are typical of an old device. Consider it as an extra, a trial for an external flash. Batteries are not included.