One periscope telephoto unit has 2.8x optical zoom with a 65mm focal length, while another has a 6x optical zoom with a 135mm focal length (per https://www.gsm

One periscope telephoto unit has 2.8x optical zoom with a 65mm focal length, while another has a 6x optical zoom with a 135mm focal length (per https://www.gsmarena.com/oppo_find_x7_ultra_in_for_review-news-61217.php https://www.gsmarena.com/oppo_find_x7_ultra_in_for_review-ne...)