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Gettting a good Meade 7" ED?

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#51 CHASLX200

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Posted 13 May 2019 - 05:47 PM

I, too, am sorry to hear about your sister, Charles. I hope everything turns out okay.

 

Sincerely,

 

Steve

Thanks.



#52 CHASLX200

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Posted 13 May 2019 - 05:49 PM

Stuff like that is why I don't buy used. mad.gif  People, to a large degree, are horrible.

But back then no one even knew what was going on in 1999.  I am sure he thought Meade would fix it before i bought it.  And i am sure Meade did collimate it, but once shipped it was out again when i got it back 3 times.



#53 starman876

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Posted 13 May 2019 - 06:25 PM

I love threads about the 178ed. Most people that post about it make it sounds like it's a plague that you should avoid at all cost. I have owned 2 127ed's in the past witch where 100'% problem free. I have always wanted the 178ed and about a year ago I  finally found one after looking for years. It took me placing a wanted ad at least 5 times over a period of at least 5 years to find one. Even after looking for so long did I get a perfect scope??? No. I did have to re-glue the baffles and the centering although very close to perfect after shipping coast to coast does need some work. 

 

When I first received the scope I took the scope to a star party with the lose baffles in the light path, with the centering not perfect and it still produced by far the best view of m45 that I have ever seen. The extent of the nebulocity was amazing and close to photo like. The view of Jupiter with the Binotron was absolutly crazy. 

 

These threads make you feel that every owner of one is just waiting to unload this OTA. If you do decide to place a wanted ad you find that this is very far from true.  What other option do you have for a 7" refractor that's not even an ED in the $3k price range????? Its the best bargain in the frac used market as far as I'm concerned as long as you are willing to show it a bit of love. 

My feelings exactly.   Look at the cost of other APO's in this size.  Some people who got them before the fix to the lens cell have never stopped bad mouthing the 178ED.  You think they would at least go look through one that has the lens cell fix.  


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#54 39.1N84.5W

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Posted 13 May 2019 - 07:00 PM

Had one. Sold it. Bought an istar. Much happier and wished I hadn't gone down the meade 7" route.

#55 starman876

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Posted 13 May 2019 - 07:40 PM

Had one. Sold it. Bought an istar. Much happier and wished I hadn't gone down the meade 7" route.

Sorry you had a bad experience like other have had.  All I know is the one I have is a joy to use.


Edited by starman876, 14 May 2019 - 02:00 PM.

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#56 39.1N84.5W

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Posted 13 May 2019 - 09:40 PM

I don't doubt that yours is good! But my experience is that my old 7" meade, like many, are not worth the hassle. And when there is a better, more consistent supplier in the large achromat market, why risk it?

#57 PowerM3

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Posted 13 May 2019 - 10:54 PM

I don't doubt that yours is good! But my experience is that my old 7" meade, like many, are not worth the hassle. And when there is a better, more consistent supplier in the large achromat market, why risk it?

The 178ed is not an achromat. It has an ed element and color correction that is on par with any current ed doublet. My particular 178ed has better color correction that my FS-128. I'm not a fanboy saying it a perfect scope. But there really are no other options that come even close to the 178ed it the price range. I hope there will be one day. I really dont think there will be because a 7" refrqctor is WAY larger than what ~95% of people can, and are willing to mount. 


Edited by PowerM3, 13 May 2019 - 10:55 PM.

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#58 CHASLX200

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Posted 14 May 2019 - 05:07 AM

The 178ed is not an achromat. It has an ed element and color correction that is on par with any current ed doublet. My particular 178ed has better color correction that my FS-128. I'm not a fanboy saying it a perfect scope. But there really are no other options that come even close to the 178ed it the price range. I hope there will be one day. I really dont think there will be because a 7" refrqctor is WAY larger than what ~95% of people can, and are willing to mount. 

I hope a 7"ED can be done for $5k or less one day.



#59 HARRISON SCOPES

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Posted 14 May 2019 - 05:32 AM

Sadly both mine were the older unfixed ones, I fixed them but they were still sensitive.

I dont think we got any fixed ones here, I worked for the importer in the 90's when they came in, we maybe only brought in under 10 of them the whole time

#60 CHASLX200

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Posted 14 May 2019 - 05:55 AM

Sadly both mine were the older unfixed ones, I fixed them but they were still sensitive.

I dont think we got any fixed ones here, I worked for the importer in the 90's when they came in, we maybe only brought in under 10 of them the whole time

Meade was in over it's head on that cell with the 7" ED's



#61 HARRISON SCOPES

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Posted 14 May 2019 - 06:20 AM

Apparently it was one optician who did all the 178s. I have to say all the ones I tested were good or very good just compromised by the poor cell
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#62 25585

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Posted 14 May 2019 - 06:26 AM

Pop a Zambuto and better 2ndary in there and then it could be a great scope.

It has good mirrors already, 1/10th wave primary. 



#63 39.1N84.5W

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Posted 14 May 2019 - 07:36 AM

Pardon my French, I should have said non-APO.
The istar 204 f6 gives the meade 7" a serious contender, that's all I'm saying. And after talking to Ales about the glass choice it makes sense why the views through my 8" istar are just as good (if not better) than my previous meade 7".

#64 HARRISON SCOPES

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Posted 14 May 2019 - 08:03 AM

They surely show way more colour than an f9 with ED glass

#65 39.1N84.5W

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Posted 14 May 2019 - 11:08 AM

And colour is only one part of the equation.

#66 austin.grant

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Posted 14 May 2019 - 12:05 PM

So i need to have my second chance with this scope.

Fool me once, shame on you. Fool me twice.... :)



#67 peleuba

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Posted 14 May 2019 - 12:11 PM

And colour is only one part of the equation.

 

True,  but IMO this is not a serious planetary instrument - I mean no offense when I write this.flowerred.gif    The out-of-focus color will reduce the poly strehl to a point where it becomes very hard to observe low contrast planetary detail. 

 

All IMO of course.  But I have looked through a large short focus achromat and I was disturbed at the planetary performance, but delighted at the deep sky potential.

 

For me, large fast achromats sort of defeat the purpose of a big refractor.  I want large unobstructed (reasonably color-free) aperture for the planets.  If I want deep sky, I will use an even larger Newtonian.  


Edited by peleuba, 14 May 2019 - 04:18 PM.

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#68 HARRISON SCOPES

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Posted 14 May 2019 - 01:01 PM

And colour is only one part of the equation.


It is yes but destroys contrast on planetary detail. Figure is important and all the 178s I tested had good figure just terrible cells that were too big and poorly designed.

#69 starman876

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Posted 14 May 2019 - 02:05 PM

It is yes but destroys contrast on planetary detail. Figure is important and all the 178s I tested had good figure just terrible cells that were too big and poorly designed.

a good figure does help.   however, you wonder why would meade sell a scope with a cell that could not hold the lenses properly?  



#70 Tank

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Posted 14 May 2019 - 03:52 PM

these are all about proper collimation and lens cell ability to adjust

Extremely happy with mine when i adjusted it

Extremely unhappy when it wasnt and flopping in the lens cell

Great scope and a bit misunderstood



#71 HARRISON SCOPES

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Posted 14 May 2019 - 04:02 PM

I'd have another despite the niggles

#72 starman876

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Posted 14 May 2019 - 05:33 PM

these are all about proper collimation and lens cell ability to adjust

Extremely happy with mine when i adjusted it

Extremely unhappy when it wasnt and flopping in the lens cell

Great scope and a bit misunderstood

I think people do not understand how one of these 178's performs when properly set up.  7" of unobstructed view is pretty impressive. 


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#73 CHASLX200

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Posted 14 May 2019 - 05:35 PM

They surely show way more colour than an f9 with ED glass

I could not even live with the color of my CR6 on the moon.  F/6 would be a blaze in color. I could never stand that.  Maybe ok at 30x sweeping. 



#74 CHASLX200

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Posted 14 May 2019 - 05:37 PM

Fool me once, shame on you. Fool me twice.... smile.gif

The seller would get $4k but they have to offer a refund if it is not what i want.  I figure 4k is a fair price, or i would have to pay 20k+ for a real 7" like a AP.



#75 starman876

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Posted 14 May 2019 - 05:50 PM

I'd have another despite the niggles

That's the spirit


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