Reduce a picture file size using Preview Preview is another method I used until I discovered the Squash image file size reducer. To compress an image without losing quality in Preview, follow these steps: Double-click the file you want to work with to open it in Preview. Then, click File...
Two more images from the night of 23-24. Sh2-132 with variable star RW Cephei and Bubble Nebula, NGC 7635. Sh2 132 with less exposure time due to late hour (about 2 am) and I was impatient to shoot the bubble that was still pending. Takahashi MT 130 with reducer at f/4.8. ZWO ...