Feature(may vary by option.)
●The main function; SVBONY bahtinov masks take the guesswork out of focusing and even get over the seeing conditions
●3-post mounting; SVBONY masks grip the telescope tube gently but firmly with three metal posts; This prevents slippage; whilst allowing the mask to remaining perfectly central
●SVBONY Bahtinov Mask is made of aluminum alloy; not plastic; And it has whole anodizing aluminium process
●Thin and light design; Aluminium alloy material thickness is 1 mm; Light weight so you wont upset the balance on your scope
●Suitable for telescopes front end outer diameter 65mm to 100mm; Universal adaptation; 3 bolts with plastic cover allow the mask to be simply attached to any telescope
[105-150mm]
[175-220mm]
[65-100mm]
Description
SVBONY Bahtinov mask has become the preferred method of focusing a telescope, either visually or when imaging with a CCD camera, DSLR or webcam.
Please be assured that these focusing masks will work excellently for both reflectors and refractors with whatever focal length.
Note: you need to measure your telescope tube size and choose the right size of the mask.
Very thin and lightweight
A thin bahtinov mask can help you achieve the purpose of focusing, and the light weight will not break the balance of your telescope.
Come with well protected 3 screws
The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect you valued telescope surface.
Solid design
Premium grade of aluminum, valued for fall resistance.Dont worry about it being damaged.
How to use SVBONY Bahtinov Focus-Mask?
Step 1:Place the SVBONY 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.
Step 2: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.
Step 3: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.
