Save as TIFF in MaximDL
1a_Use_Combine_Method_Median_if_you_stack_less_than_5_Photos-Use_FITS_Format_IEEE_Float

1a. Use Combine Method Median if you stack less than 5 Photos-Use FITS Format IEEE Float

1b_Use_Combine_Method_Sigma_Clip_if_you_stack_more_than_5_Photos-Use_FITS_Format_IEEE_Float

1b. Use Combine Method Sigma Clip if you stack more than 5 Photos-Use FITS Format IEEE Float

2_Select_File_SaveAs

2. Select File SaveAs

3_SaveAs_TIFF_only_by_using_these_settings

3. SaveAs TIFF only by using these settings

4_Open_your_TIFF_in_Photoshop_for_further_processing

4. Open your TIFF in Photoshop for further processing