[209herschel (Herschel)]

Hi all, I've spent a few hours this past week learning about my new 10" dob and I love it. Now that it's the weekend, I worried about leaving it outside too long as it gets pretty dewy out there. I took my scope into the yard, gave it 30min to reach outside temp, and watched the moon rise. Incredible fun. That was two hours ago and I'd like to go out again at around 11pm when the neighbour's lights are off, etc. Is it okay to leave the scope outside with the cover on for a few hours in this cold, moist environment? I know people spend all night out at star parties so I thought it should be fine. I just thought I'd ask as I already noticed a couple of spots on the primary. Thanks in advance.