Aluminum Bahtinov Mask Caliber Fixed Diameter Mask 60mm/80mm/100mm for Telescope
Place the Bahtinov Focus-Mask over the end of your telescope, then locate a bright star near your target, take a 3-5 second picture and view the diffraction spikes. Change your focus, take another picture and again, view your diffraction spikes. Is the center spike moving further from center? Then change the direction your focusing and try another picture. Watch the direction the spikes are moving and when the center spike passes the middle of the other two spikes, change direction and fine tune your tuning knobs until the center spike is in the middle. Your now in perfect focus.
60-80mm
Suitable for fixing 60-80mm diameter telescope
The complete set includes 1 aluminum alloy fish bone and 3 fixing screws.
85-110mm
Suitable for fixing 85-110mm diameter telescope
The complete set includes 1 aluminum alloy fish bone and 3 fixing screws.
85-150mm
Application: The caliber is above 85 mm and below 150 mm. Basically it can be applied, depending on the inner hole and outer diameter of the hood. This fishbone has two fixing methods. The conventional one is fixed on the outer diameter of the hood, but it can also be fixed in the inner hole of the hood.
Features:
Suitable for telescopes front end diameter 60mm to 80mm, Universal adaptation, 3 bolts allow the mask to be simply attached to any telescope
Aluminium alloy material thickness: 1 mm
Color: Black
Package Includes:
1 X Bahtinov Mask
3 X Screw Kit
