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it reduces exposure time by a factor of 3
With such a wide field
1:8 thickness ratio) Secondary Mirror Thickness: 8
you can zoom through the power range
Like New ZWO Gen 1 Filter Holder/Drawer Sky-Watcher it reduces exposure time byDescription: This is a Generation 1 ZWO filter holder for 2" filters not the current Gen 2, so this will not fit in the current gen 2 filter drawer. It has M48 threads. This is in perfect, unmarked condition, and comes in a plastic box. You reap the savings! ZWO's filter drawer includes one 2" filter holder. However, you can purchase additional filter holders without having to buy the entire filter drawer all over again just for the holder. You can
US$ 129.50
US$ 199.50
US$ 118.44
