Telescope Accessories 10 Kind Telescope Astronomy Focusing Mask Caliber Fixed Diameter 65-100/85-120/105-150/125-180/290-340 Monocular(105 to 150mm)

Type: MonocularModel Number: 290-340Products include:1 x mask Screw Kit

• Place the 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.
• 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.
• Astronomical telescope accessories, Barlow lenses (2x, 3x), moon filters, and planetary filters for stunning detail on the Moon, planets, and deep-sky objects.
• Astrophotography & Imaging Essentials Capture the cosmos with T-ring adapters, prime focus adapters, field flatteners, reducers, smartphone adapters, and dedicated astronomy cameras.
• If you encounter any issues, feel free to contact us by email for prompt support.