Just seal it, but don't pull reduced pressure. Dust will migrate in if the bag's integrity is broken or a seal fails. It's not like you need to protect the optics from "The Andromeda Strain". Make sure the scope is relatively clean first, and wrap it in as clean an environment as possible. On Mon, May 5, 2008 at 3:54 PM, Canopus56 <canopus56@yahoo.com> wrote:
I've been thinking about trying vacum storage bags next year for a 10" Newt. The largest that they come in is 48" x 33" - too short from my Newt, but large enough to hold an SCT.
http://www.merchantamerica.com/spacesaverbag/index.php?ba=home
For a 10" Newt, I has thinking of wrapping the scope in 2 bags and then duct taping the seal and not evacuating any air.
For other scopes that would fit in a 48" x 33" bag, you would not pull all the air out of the bag due to the crush hazard. Remove just enough to assure that the bag is sealed.
Haven't actually done it yet - just an idea.