1981 Meade 2080 8" SCT. optics , GOOD ? or BAD ?
Posted 21 March 2013 - 10:35 PM
Posted 22 March 2013 - 09:19 AM
Posted 22 March 2013 - 02:17 PM
That said, always purchase subject to star test; it's the only sure way to avoid the purchase of a substandard example.
Posted 22 March 2013 - 02:31 PM
Posted 22 March 2013 - 05:11 PM
Posted 22 March 2013 - 05:28 PM
Posted 22 March 2013 - 09:25 PM
Posted 22 March 2013 - 09:54 PM
Posted 22 March 2013 - 09:59 PM
Posted 24 March 2013 - 10:43 PM
Yet it seems Dynamax's get ALL the Bashing.
I have a 1976 DX6" Dynamax that has very good optics.
In most Meades I have looked through Stars in focus looked like bloated little fuzz balls, without a nice airy disk and defraction ring.
I'm sure there are good ones. I just havent looked through one, I have viewed with, owned or serviced about 25 of them.
They seemed to be...well...just OK.
LX3 is where they really began getting their optics good.
They have ALWAYS had a very good build quality as far as mechanics.
Posted 24 March 2013 - 11:24 PM
Posted 25 March 2013 - 02:20 AM
I absolutely agree with you. I myself have called the Meade SCT optics in general 'soft' - it's the best description I can come up with to describe the appearance of star images and planetary detail with the Meade SCTs. Same with a much later (1990's) 16" Meade SCT owned by a friend in our local astro club.
I agree. They had a wide range from bad to good optics. Heaven knows I have had enough of the bad ones. I kept trying to find a good one. Not sure if I ever did. In most the optics are what I call very soft. You would get a decent image to a point, but never any really sharp detail. I would align the optics on a star until perfection and the rings in and out of focus would show a really good alignment. However, I do not think that the smoothness of the mirror surface was really that good hence the soft images.
I bought a second 10" OTA to replace a complete fork mounted version which I traded for an old Byers 812 mount (I got the better part of that deal) and put the new OTA on the Byers. It has similae optics but going from flimsy and shaky and full of play in every part to rock solid with the 812 mount was like night and day. I think part of the problem (I wrote to Meade with a very long and detailed analysis, according to me, not a mechanical engineer but had been a fairly experienced amateur for more than a decade at the time) was that the fork mount and wedge for the 10" OTA was not scaled up from the 8" mount - it really wasn't at all adequate for the much larger and heavier 10" tube assembly. Also, trying to move the fork mount in small increments to find objects was quite difficult because the tube is incredibly front-heavy. Serious weight is necessary at the rear to balance that OTA and it was quite awkward to use the fork mount, in my opinion (of course locating objects as far north as M81/82 was very frustrating due to the near impossibility of getting ones head in position to use a finder or observe through the main eyepiece).
Posted 25 March 2013 - 01:19 PM
Posted 25 March 2013 - 02:18 PM
I have heard Pro's and Con's about this scopes optics. Can anyone give me there play on this scope?
Not bad. Better than a Criterion, not as good as a C8. Certainly useable. B-U-T...with Orange Tube C8s being readily available, there's not much incentive to get a 2080 unless one falls into your hands for practically nothing.
Posted 25 March 2013 - 02:36 PM
Posted 25 March 2013 - 04:46 PM
You pays your money, and you takes your chances...
Posted 29 March 2013 - 07:38 PM
Unless you get an LX3 like mine with the silvered optics
That's a $25 dollar fix. Send the secondary out for a recoat. My guy just stripped and enhance recoated a couple for $50. The primary is standard Al SiO and Mg.
Meades from this period are pretty comparable to the Celestrons. The Meades actually had smoother optics due to the hand figuring of secondaries at Celestron. Of course the hand work made for marginlly better optics. Figure that the Meade scope sold for something like $4-5K in real dollars and enjoy your bargain.