YROHGKPN T2 Extension Tubes 3mm 5mm 10mm 15mm 20mm 30mm M42x0.75 on Both Sides for Astrophotography Focusing Problem Solution
YROHGKPN
The extension tube set is used to obtain the correct image focal length or exact spacing required, therebysolving the spacing problem in astrophotography The required spacing can be achieved by combining several T2-Extension Tube of different length; you can use 1 piece; 2 pieces; 3 pieces; 4 piece; 5 piece; 6 piece of the extension tubes as you like By combining multiple extenders of different lengths, you get the right focal length to focuswith the camera or eyepiece All metal construction and anodizing aluminium process; for long time use The M42x0.75 threadson both ends make it versatile External thread M42x 0.75; internal thread M42x0.75
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