How many distinct kinds of camera lenses are used to take photos of mountains in the country 'Ethiopia'?
CREATE TABLE mountain (
    id VARCHAR,
    country VARCHAR
)

CREATE TABLE photos (
    camera_lens_id VARCHAR,
    mountain_id VARCHAR
)
SELECT COUNT(DISTINCT T2.camera_lens_id) FROM mountain AS T1 JOIN photos AS T2 ON T1.id = T2.mountain_id WHERE T1.country = 'Ethiopia'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many distinct kinds of camera lenses are used to take photos of mountains in the country 'Ethiopia'? ### Input: CREATE TABLE mountain (
    id VARCHAR,
    country VARCHAR
)

CREATE TABLE photos (
    camera_lens_id VARCHAR,
    mountain_id VARCHAR
) ### Response: SELECT COUNT(DISTINCT T2.camera_lens_id) FROM mountain AS T1 JOIN photos AS T2 ON T1.id = T2.mountain_id WHERE T1.country = 'Ethiopia'