I want to purchase a 50mm lens for my A6000. Sony currently has two offerings: SEL50F18F and the 50mm f/1.8 OSS. One is full frame, the other is not. The full frame is less expensive. I believe the OSS was designed for the A6000 camera type. Is there some type of trade off technically and performance wise if I select the SEL50F18F OVER THE 50mm f/1.8 OSS ? Thank you in advance for any assistance.