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M20 Trifid Nebula DSI-C, 15/30 mm spacer, Nebula filter, .33 FR, 18 frames @ 120 sec, 7" Mak(Bob McDuell)
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M20 Trifid Nebula DSI-C, 15/30 mm spacer, Nebula filter, .33 FR, 18 frames @ 120 sec, 7" Mak(Bob McDuell)
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