This Questar full aperture white light glass solar filter lets you see fine detail on the surface of the Sun – sunspots, granulation, etc. It will not show prominences, which require a specialized Hydrogen-alpha narrow band filter to be visible.
The Questar filter threads securely into the front cell of all 7" Questar optical tubes. It does not merely slip over the front of the optical tube, as is the case with lesser filters. The filter is made of BK-7 optical glass, polished plane-parallel on both sides to reduce the possibility of internal reflections. It is chrome coated to reduce the heat and visible light of the Sun to levels that are safe for both your scope and your eyes.
Shipping is free on this Questar item if it is purchased with a Questar scope that is being drop-shipped to you from the Questar factory. If this item is being purchased by itself as a special order item, a $24.95 freight charge and a 14-day or longer delivery time will apply. The $24.95 freight and a $20 Questar drop-ship charge will apply if faster delivery is required and it must be drop-shipped to you from Questar.
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