CREATE TABLE mountain (id INT, name TEXT, Height FLOAT, Prominence FLOAT, Range TEXT, Country TEXT)
CREATE TABLE photos (id INT, camera_lens_id INT, mountain_id INT, color TEXT, name TEXT)
CREATE TABLE camera_lens (id INT, brand TEXT, name TEXT, focal_length_mm FLOAT, max_aperture FLOAT)

What are the number of the names of photos taken with the lens brand 'Sigma' or 'Olympus'?, and show in desc by the how many name please.
SELECT T1.name, COUNT(T1.name) FROM camera_lens AS T1 JOIN photos AS T2 ON T2.camera_lens_id = T1.id WHERE T1.brand = 'Sigma' OR T1.brand = 'Olympus' GROUP BY T1.name ORDER BY COUNT(T1.name) DESC
SELECT "T1"."name", COUNT("T1"."name") FROM "camera_lens" AS "T1" JOIN "photos" AS "T2" ON "T1"."id" = "T2"."camera_lens_id" WHERE "T1"."brand" = 'Olympus' OR "T1"."brand" = 'Sigma' GROUP BY "T1"."name" ORDER BY COUNT("T1"."name") DESC NULLS LAST