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Just thought I'd share this in case you haven't seen it already. A recent (September 2020) article added to the Celestron 'Knowledge Base' on collimating SCTs.
I don't claim to have seen all articles on collimation, but this is defs one of the best that I have seen.
So I am fairly new to the hobby, what I mean is I have a Celestron Astromaster 114 right now but its hard to use because of the non computerized equatorial mount as well as the red dot sight is bad. I am mainly interested in looking at DSO’s because they seem very interesting. My question is should i get a refractor or sct for observing dso’s and sometimes planets? I want a computerized one with tracking so I don’t have to take a long time finding nebulae and galaxies. Also, is there a certain type of filter to see color on nebula when not using eaa and just viewing with your eyes? I am looking to spend between $600-900
I am excited to join this big star gazing community! I realize I am abusing of your kindness, so that you in advance for any help you can give.
I have an old telescope, what appears to be a Meade ETX 90 from the early 2000s. I cleaned it pretty well after many Youtube videos and online research. I found full blown spider webs and dead spiders!
I have encountered a few of issues as I'm putting it back together and I wonder if anyone might be able to help.
1. I took off the screws of the back of my OTA (I know I shouldn't have!) and now I'm not sure how to put them back on (see attachments). When I try it seems to push the primary mirror instead of fastening to anything.
2. My secondary mirror flip is broken, the plastic piece part fell off. Is it possible to fix? The mirror itself is also very dirty (see attachments) and I don't think it can be cleaned further. Any tips on how to replace it and where to buy the parts? Or is it possible to not use the 90 eye piece viewport and instead use the front one so I don't need to fix the flip or the mirror?
4. My secondary baffle is sliding off. I've read that this is a problem w/older models. I tried pushing it to the right place and it requires some force, but after 1 minute it slides back to its original place. What should I do? Does this matter?
5. The plastic attachment to hold the smaller lens (finderscope?) wobbles no matter how tightly I screw it on. I don't know if it has anything to do with the front plastic part being a little broken.
Thank you for your help in advance, and I am still learning terminology so be easy on me
I am selling my Meade LX90 8" EMC with many accessories due to equipment upgrade, so this lovely scope needs a new home. All in excellent condition; no rust, battery boxes spotless, all motors function perfectly, holds collimation extremely well (only had to collimate once in the past 2 years), when well polar aligned I have achieved 3 minute unguided DSLR exposures.
Meade LX90 8" EMC (in original Meade foam-filled shipping box)
Meade 8x50 finderscope
Meade standard field tripod
Meade equatorial wedge (replacement bolts to hold telescope and adjust azimuth)
Meade AUDIOSTAR handset (under 2 years old) in original box (Provides much more functionality than the original Autostar)
Meade UHTC flip-mirror system for photography
Meade 1.25" eyepieces: 40mm 32mm 26mm 15mm 12.4mm 6.4mm
Meade 1.25" telenegative amplifier air spaced triplet barlow
Meade series 4000 1.25" filters x5
Meade erecting prism and a 90° eyepiece holder
Celestron 2" Mirror diagonal Starbright XLT with 1.25" adapter in original aluminium case
Meade #505 cable connector set to connect PC to handset to control mount and update firmware
Meade ST-4 module for connecting a guide camera to the mount
Meade handset holder
Meade front counterweight
Jessops flight case to hold eyepieces, etc.
Please ask for more photos/information. Price includes shipping to Western Europe. Paypal preferred.