I'm new to astronomy and I've been following the forum for few months now. Thank you for all the info you have put out there, I found everything really useful.
I have bought a pair of 10x50 binoculars to start my journey in astronomy and I've observed few Messier objects from my backyard for few weeks now... until I decided to move to a larger instrument. I have decided to buy an Explore Scientific Ultra Light Dob 10 inches -- Generation II, i wanted to have something reasonably transportable. While my experience with the binoculars has been great (I had a chance to read books and learn by observing), my experience with my first telescope has been miserable so far (I had a small refractor few years ago but I haven't used it much apart from planet observation).
I have bought the ES UL Dob10 at the beginning of May and after few days I've received it here (well packaged). Once I opened the boxes I've noticed the following issues: two missing parts (manual and battery pack), many metal debris everywhere (mirror box and rocker box) and few spots with rust on the mirror box (nothing major but I've found it a little disappointing for a new product). Unfortunately, once I opened the mirror box I had an even less pleasant surprise. I've noticed (without flashlights or anything, just looking at it): i) the north side of the mirror was irregular for a portion of the mirror edge circumference (irregular like the reflecting surface being irregular instead of an arc of circumference); ii) there was a blue/green smudge on the mirror surface (like a coating issue; at least that's what it looks to me for comparison with other optical instruments). After that I've opened the rocker box and I've discovered that the focuser (two speed) was not working correctly either: the micro focuser wheel was actually not moving the barrel when rotated. I've contacted the customer service, provided several photos and they offered a replacement (they previously agreed to ship to me the battery pack for the fans and the manual which I received in few days).
I have asked to them to make sure to inspect the unit to verify the content and the working condition of all components. This took more than a week but they notified me in advance that would have been a lengthy process due to my request. I have received the replacement unit today (it took a while to get here due to Holiday as well)... as you might imagine at this point, things do not look good either. The mirror presents a similar blue/green coating issue in few spots (before it was only in one spot), actually this actual one is slightly less pronounced in intensity but covering more mirror surface (I would be grateful if you could help me understanding what that is -- photo attached below for one of these spots). Moreover, there is a white circular sign (residue?) on the mirror edge and a small scratch just close to it (photo attached below).
Now, I have contacted the customer service again this afternoon and they are looking at the pictures, but my question for you is: am I being unreasonable here? Should I just use the scope without looking at the mirror? Is it reasonable to expect to get a mirror unaffected by macroscopic defects like these? They told me that this mirror has been inspected by two people for 3 hours and they haven't seen any defects under a magnifying glass. I surely trust them, that's why I would be grateful if you could look at the photos and help me interpreting what I'm seeing since these issues are visible without magnifying glass. Now I understand that the mirror will look dirty after a while, but I feel I should not get a mirror with a stain on it right out of the box.
I really do not know what to think, I can just say that I'm not particularly happy with what I have received.
Thank you all for the help and sorry about the lengthy post