An e-mount to 1.25" telescope adapter. For the moon, I used the following settings on the Sony: Exposure time: 1/640 Sek. ISO: 200 Flash: No ;-) For the roof these settings: Exposure time: 1/320 Sek. ISO: 100 I have also triggered by remote control, to avoid camera shake. My telescope is a Orion 6" Dobson with 750mm focal length.It would be better the adapter to print in black. I have used PLA and Cura for slicing. The adapter fits perfectly for me. Depending on your printer, it may be that you have to use sandpaper. --- I will soon upload a new version. --- This version does not lock.