Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_51 ( mpix INTEGER, width VARCHAR, aspect_ratio VARCHAR, height VARCHAR )

### Question ###
What camera has the highest Mpix with an aspect ratio of 2:1, a height less than 1536, and a width smaller than 2048?

### Accurate SQL ###

SELECT MAX(mpix) FROM table_name_51 WHERE aspect_ratio = "2:1" AND height < 1536 AND width < 2048