CREATE TABLE table_28144 ("Camera" CLOB, "Filter" CLOB, "Wavelength" CLOB, "Total exposure time" CLOB, "Exposures" FLOAT)

how many times was the exposures 53?
SELECT COUNT("Camera") FROM table_28144 WHERE "Exposures" = '53'
SELECT COUNT("Camera") FROM "table_28144" WHERE "Exposures" = '53'