This 172mm focal length positive achromatic lens acts as a 0.7x focal reducer for imaging with both the 3.5" and 7" Questars. It threads into the Questar camera adapter, between the scope and your camera.
When used with a 3.5" Questar and the #1393 camera adapter, the Questar 0.7x reducer turns the 1300mm f/14.4 3.5" Questar into a 910mm f/10.1 lens.
When used with a 7" Questar, the Questar 0.7x reducer turns the 2400mm f/13.4 7" Questar into a 1680mm f/9.4 lens.
The image above of the Questar 0.6x focal reducer shows where it fits into the Questar camera adapter. This #39506 0.7x focal reducer is similar in appearance.
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 $12.95 freight charge and a 14-day or longer delivery time will apply. The $12.95 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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