Please Measure Your Telescope Objective Diameters:
As these solar filters will work as a cap to put on your telescope objective tube， it would be more accurate if you measure the tube diameter as different telescope with same nominal objective diameter may have different tube size.
The 90mm solar filter will fit a telescope with an internal objective tube diameter of about 112mm. It can also be used on a telescope with an external tube diameter of about 102mm although it is designed for internal tube fitting.
Features:
Brand new and high quality
The Solar Filter is for telescopes dew tube front end diameter 90mm
Safely observing the sun without damaging your eyes
Product Type: Bard film
Applicable models: 90mm caliber Universal
Optical density: 5.0 Aperture of the telescope
Outside diameter: 111mm
Inside diameter: 103m
Material: Plastic
Main performance: observation of sunspots， solar eclipse and other astronomical scene
CAUTION:
Don't use cracked solar filter
Don't use bad quality solar filter
Don't look directly at the sun
Never look at the Sun， either directly or through a telescope， without a professionally made protective solar filter installed that completely covers the front of the instrument， or permanent eye damage could result.
