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Equipment Discussions >> Cats & Casses

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John59
professor emeritus


Reged: 11/06/11

Loc: Round Rock,TX
Question on SCT storage
      #5466852 - 10/12/12 12:42 PM

Is is ok to store the celestron C11 standing on its end?
Corrector down with cap in place.


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Corky
scholastic sledgehammer
*****

Reged: 04/22/08

Loc: Ohio, USA
Re: Question on SCT storage new [Re: John59]
      #5466875 - 10/12/12 12:54 PM

Certainly not.
Lubricating grease can drip down onto the corrector plate.
It is recommended to have the corrector plate pointing upwards at about 45 degrees.


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rmollise
Postmaster
*****

Reged: 07/06/07

Re: Question on SCT storage new [Re: Corky]
      #5466975 - 10/12/12 03:51 PM

Or just store the scope on its side in a good case, which is what I do.

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EdZ
Professor EdZ
*****

Reged: 02/15/02

Loc: Cumberland, R I , USA42N71.4W
Re: Question on SCT storage new [Re: rmollise]
      #5467173 - 10/12/12 05:51 PM Attachment (33 downloads)

Quote:

Or just store the scope on its side in a good case, which is what I do.




same here
edz


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RobertED
Post Laureate
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Reged: 07/11/03

Loc: Smithfield, RI
Re: Question on SCT storage new [Re: EdZ]
      #5467435 - 10/12/12 09:38 PM

same here....

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Al Canarelli
Post Laureate
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Reged: 12/06/07

Loc: Central New Jersey
Re: Question on SCT storage new [Re: Corky]
      #5467525 - 10/12/12 11:05 PM

I usually store my telescopes in an enclosed back porch. Unfortunately, I also stored pool chemicals, such as chlorine and other corrosive materials, in the same porch with the telescopes. Save yourself the agony and DON'T DO IT! The close proximity of these highly corrosive chemicals will get to the metal surfaces of your telescopes, mounts and tripods...not to mention the electrical components of your telescopes. I moved the chemicals to the shed and have not had a problem since.

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orion61

*****

Reged: 10/20/07

Loc: Birthplace James T Kirk
Re: Question on SCT storage new [Re: Al Canarelli]
      #5467780 - 10/13/12 06:29 AM

easy way to get dust on the inside of the corrector over time.
I must admit I have done it with my C8 W/fork with no ill effect.


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Darren Drake
Carpal Tunnel
*****

Reged: 10/09/02

Loc: Chicagoland
Re: Question on SCT storage new [Re: orion61]
      #5467901 - 10/13/12 09:14 AM

Corky have you ever heard of lubricating grease falling onto the corrector plate when stored like this or are you just speculating that it could happen? I would think it's not an issue.

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MikeBOKC
Post Laureate
*****

Reged: 05/10/10

Loc: Oklahoma City, OK
Re: Question on SCT storage new [Re: Darren Drake]
      #5467903 - 10/13/12 09:18 AM

There have been several posts here in the past from people who have experienced just that problem, which can be a remove-the-corrector nightmare.

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rmollise
Postmaster
*****

Reged: 07/06/07

Re: Question on SCT storage new [Re: MikeBOKC]
      #5467910 - 10/13/12 09:22 AM

Well, it ain't a nightmare to remove a corrector. Not if you're careful, put it back in the correct orientation, and replace any little shims you find in their original positions. One of my students accidentally dropped an eyepiece cap through the rear port. I had him time me. Just a smidge over three minutes to get the corrector off, cap removed, and corrector back on.

I will say this: This grease dripping ain't nothing new. The C8s from the 90s would definitely do it. I do believe Synta is using a lighter variety of grease these days. But, as above, the prevenative is easy and so is the fix. In fact, I'd go so far as to say every SCT wielding amateur should know how to R&R the corrector...


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bilgebay
Post Laureate
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Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: Question on SCT storage new [Re: rmollise]
      #5468074 - 10/13/12 11:08 AM

I had stored my C9.25 CF tube nose down for over a 2 year period until 2 years ago and didn't have the dreaded grease dripping happen to me. But I can see the possibility is there. I guess I was lucky

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mayidunk
Don't Ask...
*****

Reged: 02/17/10

Loc: Betwixt & Between...
Re: Question on SCT storage new [Re: bilgebay]
      #5468263 - 10/13/12 12:38 PM

I've been storing the C8 from my U2k face down since I've owned it, and have yet to see any issues. That being said, maybe I got lucky! As always, YMMV..

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Ed Holland
Carpal Tunnel


Reged: 06/16/10

Loc: San Jose, CA and Oxford, UK
Re: Question on SCT storage new [Re: mayidunk]
      #5469020 - 10/13/12 10:23 PM

You could arrange a way to stand it on it's other end ...not easy though.
Mine is kept on a closet shelf in a re-purposed sports bag (Goodwill is a great place). It is on its side, mostly by accident


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EFT
Vendor - Deep Space Products
*****

Reged: 05/07/07

Loc: Phoenix, AZ
Re: Question on SCT storage new [Re: Ed Holland]
      #5469867 - 10/14/12 02:05 PM

I keep mine in a soft case and the only reasonable way to store it is corrector down (configuration and space wise). It is not ideal but it is difficult to tell whether or not you will have a problem. I have seen SCTs where the grease has separated and run down the inside of the tube (and these were fairly new ones) and I have seen others where this was not a problem. I don't have enough information to predict when and where this will happen, but it is certainly more likely with higher temperatures. If it does happen to run down the baffle tube and drip onto the corrector, or worse yet the secondary, this will not be good. The reality is though, if you can't store it on the mount and you don't have room to store it horizontally, then storing it face down is the easiest and most convenient. Watch for any signs of grease separation and running though.

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Rick Woods
Postmaster
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Reged: 01/27/05

Loc: Inner Solar System
Re: Question on SCT storage new [Re: EFT]
      #5471917 - 10/15/12 05:17 PM

You have to love those big Rubbermaid tubs as SCT cases. I keep my C8 in one, with loads of foam around it. That'll take any abuse I'm likely to subject it to.

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Rick Huber
sage
*****

Reged: 01/03/04

Loc: South of Cincy Ohio
Re: Question on SCT storage new [Re: Rick Woods]
      #5472107 - 10/15/12 06:55 PM Attachment (30 downloads)

Found this - Looks like Celestron in the early days did not concern themselves with grease dripping on the corrector

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Super08
sage


Reged: 05/18/12

Loc: Great White North
Re: Question on SCT storage new [Re: Rick Huber]
      #5472414 - 10/15/12 10:28 PM

The problem with grease most likely did not become a problem until production was moved overseas.

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Ava
sage


Reged: 11/30/11

Loc: Sweden
Re: Question on SCT storage new [Re: Super08]
      #5472799 - 10/16/12 06:36 AM

I've been thinking of this too. If I could store my EdgeHD the other way around, that is standing on its visual back so to speak (with padding and proper support of course), do you think that would that work? Or would I just trade grease running onto the corrector for grease running onto the field flattening lenses?

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EFT
Vendor - Deep Space Products
*****

Reged: 05/07/07

Loc: Phoenix, AZ
Re: Question on SCT storage new [Re: Ava]
      #5473121 - 10/16/12 11:25 AM

Quote:

I've been thinking of this too. If I could store my EdgeHD the other way around, that is standing on its visual back so to speak (with padding and proper support of course), do you think that would that work? Or would I just trade grease running onto the corrector for grease running onto the field flattening lenses?




There should not be any grease on the inside of the baffle tube to run down onto the optics.


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Alph
Carpal Tunnel


Reged: 11/23/06

Loc: Melmac
Re: Question on SCT storage new [Re: EFT]
      #5473224 - 10/16/12 12:23 PM

Quote:

Quote:

I've been thinking of this too. If I could store my EdgeHD the other way around, that is standing on its visual back so to speak (with padding and proper support of course), do you think that would that work? Or would I just trade grease running onto the corrector for grease running onto the field flattening lenses?




There should not be any grease on the inside of the baffle tube to run down onto the optics.




Well, I found grease on the primary of my C14 just a few weeks after I received it back from Celestron.


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Alph
Carpal Tunnel


Reged: 11/23/06

Loc: Melmac
Re: Question on SCT storage new [Re: Super08]
      #5473228 - 10/16/12 12:25 PM

Quote:

The problem with grease most likely did not become a problem until production was moved overseas.



No. The problem was made in Torrance.


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EFT
Vendor - Deep Space Products
*****

Reged: 05/07/07

Loc: Phoenix, AZ
Re: Question on SCT storage new [Re: Alph]
      #5473249 - 10/16/12 12:38 PM

Quote:

Quote:

Quote:

I've been thinking of this too. If I could store my EdgeHD the other way around, that is standing on its visual back so to speak (with padding and proper support of course), do you think that would that work? Or would I just trade grease running onto the corrector for grease running onto the field flattening lenses?




There should not be any grease on the inside of the baffle tube to run down onto the optics.




Well, I found grease on the primary of my C14 just a few weeks after I received it back from Celestron.




That's not what he was talking about. He was talking about the HD optics inside the baffle tube. The primary is a different matter and could end up with grease on it from the outside of the baffle tube.


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mayidunk
Don't Ask...
*****

Reged: 02/17/10

Loc: Betwixt & Between...
Re: Question on SCT storage new [Re: EFT]
      #5473283 - 10/16/12 12:59 PM

Why should there even be any discussion about grease, or any other contaminants, inside of a brand new, high-priced telescope OTA? In my opinion, that's just inexcusable!

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amicus sidera
Post Laureate
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Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Question on SCT storage new [Re: mayidunk]
      #5474056 - 10/16/12 09:16 PM

Quote:

Why should there even be any discussion about grease, or any other contaminants, inside of a brand new, high-priced telescope OTA? In my opinion, that's just inexcusable!




Absolutely... I've never seen grease drip off the baffle on any older SCT when stored vertically.



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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Question on SCT storage new [Re: amicus sidera]
      #5474196 - 10/16/12 11:20 PM

I have a C11 which has been stored nose-down for the bulk of its 6 year life. The dreaded grease creep hasn't happened. However, I would say the ideal is on the OTA's side so dust can't land on an optical surface if it gets inside.

-Rich


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Ava
sage


Reged: 11/30/11

Loc: Sweden
Re: Question on SCT storage new [Re: EFT]
      #5474388 - 10/17/12 02:04 AM

Quote:

Quote:

Quote:

Quote:

I've been thinking of this too. If I could store my EdgeHD the other way around, that is standing on its visual back so to speak (with padding and proper support of course), do you think that would that work? Or would I just trade grease running onto the corrector for grease running onto the field flattening lenses?




There should not be any grease on the inside of the baffle tube to run down onto the optics.




Well, I found grease on the primary of my C14 just a few weeks after I received it back from Celestron.




That's not what he was talking about. He was talking about the HD optics inside the baffle tube. The primary is a different matter and could end up with grease on it from the outside of the baffle tube.




Hmm, so, would you say the risk of grease dropping onto the primary is smaller (if storing it standing on the visual back), than the risk of grease dropping onto the corrector plate if storing it standing with corrector plate down? Or are both options equally bad in comparison to storing it on the side?

I'm asking because I may be able to upgrade rather cheaply to a 9.25" EdgeHD from my 8", but that would require me to store the 9.25" standing up so I'm not sure if its worth the risk...


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Rick Woods
Postmaster
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Reged: 01/27/05

Loc: Inner Solar System
Re: Question on SCT storage new [Re: Starhawk]
      #5474426 - 10/17/12 02:37 AM

Quote:

I have a C11 which has been stored nose-down for the bulk of its 6 year life. The dreaded grease creep hasn't happened. However, I would say the ideal is on the OTA's side so dust can't land on an optical surface if it gets inside.




I bet the chances of grease creep would be a lot higher if you stored your scope in a 115 degree garage or something. I suspect under normal conditions, it rarely happens.


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aamilo
member
*****

Reged: 02/28/12

Loc: SF Bay Area, CA
Re: Question on SCT storage new [Re: Ava]
      #5474429 - 10/17/12 02:44 AM

Total newbie here who heard about the grease on corrector issue so I have since always stored it corrector up. I guess grease might fall on the primary but I think it's highly unlikely to do so. I figure if anything it would run down the outside of the baffle tube and collect behind the primary. This is my second SCT and I've only own one for a few months so I really can't say.

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orion61

*****

Reged: 10/20/07

Loc: Birthplace James T Kirk
Re: Question on SCT storage new [Re: Rick Huber]
      #5474652 - 10/17/12 08:47 AM

Quote:

Found this - Looks like Celestron in the early days did not concern themselves with grease dripping on the corrector



I'd sure love to have own one of those old C14's


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Brent Campbell
sage


Reged: 02/09/10

Loc: Olympia, WA
Re: Question on SCT storage new [Re: orion61]
      #5474663 - 10/17/12 08:57 AM

The proper way to store an SCT is on its mount in the middle of the den, the scope pointing upwards in a realistic angle like its going to catch the next supernova! Your wife despite the constant complaints of vacuuming around the thing will secretly marvel at the piece of tech-sculpture that you brought into the home.

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Stelios
Carpal Tunnel
*****

Reged: 10/04/03

Loc: West Hills, CA
Re: Question on SCT storage new [Re: Brent Campbell]
      #5475002 - 10/17/12 12:32 PM



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