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Thread: Next Project: Meade 2080. Advanced Coatings?

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    Default Next Project: Meade 2080. Advanced Coatings?



    Now that I have officially sent my oldest daughter ("Lola" the rebuilt Meade 114EQ) off to retirement at the Cincinnati Observatory, it is time to get started on fixing up her sister Clara, the Meade 2080.

    I have already gotten a set of Bob's Knobs, a collimation cap and Mak mask to check out the focus, and a beautiful new Meade 5000 series 2" prism for her.

    I am going to see how she looks tonight; the Clear Skies chart gives me fair readings for tonight, with good seeing conditions estimated for 3:00 AM. Jupiter should be an easy shot right outside the front door (I am dying to actually see bands!). It has been a while for good seeing conditions around here, even with the cold.

    Now I would figure that the silver coatings would be OK but not what we would call optimum after nearly 30 years. Most of the newer coatings are superior these days, and I am wondering how good aftermarket coatings from places like Spectrum compare. I mean, are these as good as new scopes? I know can't expect Coma Free Optics with this optical set, but am sure things can be improved more than a little.

    Getting a new corrector plate is not off the table along with new premium coatings. It doesn't seem too expensive to recoat, but I would like to possibly have the mirrors checked too (after all, this was in the Haley's Comet craze days). Lola had a mirror defect (damage) on the secondary when her mirrors were sent out, and the new coating did not work (I ended up putting in a new secondary).
    Last edited by a100171; 02-20-2015 at 07:57 PM. Reason: missing letters, slow typing response
    - Marc T.
    Meade 6, 8, and 10" Schmidt-Newtonians, CPC-800HD, EdgeHD-11, Celestron AVX, CGEM, CGEM-DX, LXD-55 mounts, ES ED-102, Orion 6" F/9 RC with Orion ST-80 Guider, 10" Meade F/6.3 LX-200, Meade DS-2090, Meade EXT-90, Omegon 2.3X binocs. ZWO ASI120MC, ASI178MM (cooled Mono) , Canon T1i, Canon T3i, Stellarium, DeepSky Planner/Tracker, Astro Photography Tool (APT), DeepSky Stacker, Backyard EOS, and dozens of EPs. HyperStar for EdgeHD-8.

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    Default Re: Next Project: Meade 2080. Advanced Coatings?

    Hi Marc,

    I applaud your effort to breathe life back into your 2080. Sure wouldn't hurt to have the optics evaluated. I wouldn't hesitate to recoat the mirrors, IIWY. Would you disassemble or send the OTA off intact?

    This will be interesting to follow. Please keep us "in the loop".

    Clear skies...Bob
    6 inch F/5 GEM mounted reflector

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    Default Re: Next Project: Meade 2080. Advanced Coatings?

    I haven't figured out where to start yet. The OTA appears to be in remarkable shape (it was stored in the Meade hard trunk). To my untrained eye, the silvered coatings actually look pretty damn good. I am going to spend a stormy night inside tonight reading back through Rod's CAT book to get some ideas.

    I have a couple of lenses coming for my DSLR body, so I will be sure to take pictures. It doesn't hurt having them for re-assembly. I saw members doing fork mount re-work, and I think it was helpful for others to see/know what was inside!

    I do see some places offering "protected silver" coatings, with claims of near 99% reflectivity. I can understand why Meade tried, but I guess the protective layers were never consistent.

    From another thread Arctic had his silvered mirrors re-done, but MN is even colder than MA lately. He did not have problems getting it back together.

    She appeared to look collimated, but a 3:00 AM trip in near 0 degree weather this morning proved otherwise. But it was just too cold to mess with it. I am not sure if this is just the secondary, or if the primary isn't sitting square.

    Yeah, it is a hobby. Some people like to know the mechanics of things. You can't imagine how many toys I disassembled growing up. Now when I do, there are hardly any spare parts left!

    I also think that "indoor pre-tuning" is something that would be very helpful to a lot of people doing service. Certainly it could minimize time out in the cold! I am back to work on Monday and will grab a couple of things to try and test indoors. One thing I am thinking is a fiber optics jumper to provide a real "pinpoint" (e.g. 62.5 nm) light source. That on a black poster board background might be a good pre-tune. Fiber is about as round as she gets.
    It would also be nice to see how she looks focused on the old-school NTSC resolution charts at a distance.
    BobDob likes this.
    - Marc T.
    Meade 6, 8, and 10" Schmidt-Newtonians, CPC-800HD, EdgeHD-11, Celestron AVX, CGEM, CGEM-DX, LXD-55 mounts, ES ED-102, Orion 6" F/9 RC with Orion ST-80 Guider, 10" Meade F/6.3 LX-200, Meade DS-2090, Meade EXT-90, Omegon 2.3X binocs. ZWO ASI120MC, ASI178MM (cooled Mono) , Canon T1i, Canon T3i, Stellarium, DeepSky Planner/Tracker, Astro Photography Tool (APT), DeepSky Stacker, Backyard EOS, and dozens of EPs. HyperStar for EdgeHD-8.

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