CREATE TABLE table_name_51 (mpix INT, width VARCHAR, aspect_ratio VARCHAR, height VARCHAR)

What camera has the highest Mpix with an aspect ratio of 2:1, a height less than 1536, and a width smaller than 2048?
SELECT MAX(mpix) FROM table_name_51 WHERE aspect_ratio = "2:1" AND height < 1536 AND width < 2048
SELECT MAX("mpix") FROM "table_name_51" WHERE "2:1" = "aspect_ratio" AND "height" < 1536 AND "width" < 2048