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Aluminum Alloy Telescope Astronomy Focusing Mask 104-146Mm Caliber Fixed Di U1R3 Place the 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.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.Masks now feature 3 holes which can be attached with 3 screws to prevent the mask from falling all the way to the ground
Perfect focusing for your CCD, DSLR or Webcam in seconds
Light weight so you wont upset the balance on your scope
cover allow the mask to be simply attached to any telescope
Type: Monocular
Model Number: for Telescope monocular
Astronomical telescope: for telescope
Bahtinov Mask: for Astronomy telescope
Astronomy: Excellent Quality
colour:black
material:Aluminum alloy
size:Product size: 100mm
Suitable for caliber size:104-146Mm
Weight:50g
Package Contents:
1*Telescope Focusing Mask
Note:
1,When you buy it , you need to check your out-diameter of the tube .Not just the Objective lens diameter.you need to put the item one the tube.
2,if you don’t know which size should to choose you can ask me before buy it
3,The size is not the diameter of the item, pls check the measurement way.
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Category: Cameras and Photography:Telescopes and Binoculars:Binoculars and Monoculars
Location: Hong Kong