Not interested in a cooled version as the FWC of the sensor at HCG 252 is just too small for DSO imaging. Stars get too oversaturated at all exposures over 60s. With only 2.5K FWC at rhe low noise Gain 252 setting, the pixel saturation is fast. The 533 sensor has 16.5K FWC at liw noise HCG so it is much better for DSO imaging. I have both cameras and have tested them extensively. The 533 is a much better camera fir long exposures over 60 seconds.