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Double stacking provides a truly enhanced high definition view of the Sun's surface details. It lowers the band pass of the system from
The LS100THa can now be internally double stacked (DSII/LS100T) at time of purchase or anytime thereafter. The LS100THa does not need to be returned to the factory for double stacking as long as you have the red anodized front cell on the scope. If you have an older model of the LS100THa with just a white tube (and no red) you will need to upgrade the scope before using the internal double stack DSII/LS100T. The “glow” that is talked about in the DSII for the LS80THa is greatly diminished.