Author Topic: Cleaning EP  (Read 201 times)

Eric Hayes

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Cleaning EP
« on: December 29, 2017, 01:50:03 AM »
I never cleaned my EP ( yet ) and heard of supply one can get on a pharmacy mixed with water used in a very clean room.
I don't know how hard the coatings is on ex Ethos EP and the P2.

I had my tummy on the P2 lense and I had hard time to remove the 'grease'.
I bought a kit from Zeiss from a local shop and I used their tissue and fine smooth textile.
Did not get a good result as I was Very careful.

But here is how I finally got it removed.
First I blowed dust off.
Then I used the fine brush.
Then I sprayed the cleaning on cotton, then I took it up/down smooth on the lense.
But when I should wipe it off ( smooth ) it was just a mess.
I breathed on lense and took fresh cotton and had to polish it out.
It took some turns but it went out great. Now edge are totally Clean.
I can't 'see' any scratches anyway...

After used it now on a star party I noted some dust and a small grease again.
I did this procedure again.
How often can one do this ?
Does it harm the lenses and this should be done once a year even if the get dirty/greasy, ( better leave it ) ?

I had this paracorr over to Stellafane last year and actually I asked Al Nagler.
He used some window cleaner on it and used cotton pins, but lense was never clean.
I asked how tuff coatings was but got not a direct answer.

The cotton polishing I has done get it clean, but is it to ruff ?
I don’t Think the Zeiss liquid is really strong ( it’s made for lenses )
I noted one at Stellafane and he had a electric polisher in his toolbox he took out and just went over his Ethos.
No cleaner etc,as hejust went over it and just breath over it to remove dust.

I heard coatings is very thin and water and some things one add into water and very very smoothly and very seldom clean them.
Grease will be as one can get eye on it, and put a finger on lense in night.
I like clean l lenses, but..



ropnolini

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Re: Cleaning EP
« Reply #1 on: December 30, 2017, 09:09:29 AM »
Sky & Telescope wrote a good article on "How to Clean Your Telescope Optics the Right Way":http://www.skyandtel...or-your-optics/ .

"How to Clean Eyepieces": https://www.youtube....h?v=7qz6voBHhi8
"Clean Those Eyepieces!": https://www.youtube....h?v=v3vWB5EgG_Q

cieledrore

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Re: Cleaning EP
« Reply #2 on: January 03, 2018, 11:30:17 PM »
Hank,
This advice is the best:http://www.televue.c...n=Advice&id=103
As for a cleaning fluid, I use ROR (ror.net), but other fluids work OK.
The key is a trace of soap and a trace of ammonia. Water and alcohol together are not strong enough.
Nagler is right about using acetone, but finding pure acetone is difficult.

breakinnocor

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Re: Cleaning EP
« Reply #3 on: January 04, 2018, 04:00:00 AM »
ROR, Purosol, and Techspec (Edmund Optics). I use the latter two. I also use kimwipes. For grease type issues I would go for the Techspec first. A lot of smart folks use ROR so it must be good.

I would avoid do-it-yerself alcohol combinations with distilled water and a drop of dish soap. Home made brew has just never delivered as well for me.

Greg N

tiocartratca

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Re: Cleaning EP
« Reply #4 on: January 08, 2018, 11:52:50 PM »
Quote
Hank,
This advice is the best:http://www.televue.c...n=Advice&id=103
As for a cleaning fluid, I use ROR (ror.net), but other fluids work OK.
The key is a trace of soap and a trace of ammonia. Water and alcohol together are not strong enough.
Nagler is right about using acetone, but finding pure acetone is difficult.

Acetone can be purchased at a car parts place like Advanced Auto.

My concern about acetone is that is sort of the nuclear bomb of cleaning, it melts plastic removes finishes and strips paint. And it is very volatile.  If you misapply it in any way, you might end up with paint smearing on your glass from the misapplication. And a tiny spill might ruin the finish of whatever you're working on.  So acetone I use rarely and preferably not at all.

GN

"Klean strip" acetone from advanced auto parts advertises itself as 100% pure, they could be lying, but that's what it says. I've had this bottle for about ten years and will probably have it another 10. I just checked the label.

Drew Bullets

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Re: Cleaning EP
« Reply #5 on: January 09, 2018, 08:34:22 AM »
ES100 14mm (primary option), ES82 6.7mm, ES68 24mm eyepieces for outreach + 91% isopropyl alcohol + Kimwipes works for me. I've never done an outreach event that didn't result in the ep's needing cleaning after the public got through head butting the eye lens and I do a lot of outreach. It's just part of the deal. "Waterproof" ep's may be a marketinggimmickbut easy, worry-free cleaning is a real benefit.

I use the same materials to clean my observing eyepiece kit but they rarely require cleaning beyond just blowing them off with a Gotti bulb blower.

Lamichael Evans

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Re: Cleaning EP
« Reply #6 on: January 10, 2018, 04:30:49 PM »
Lighter fluid (Naptha) is hands-down the greatest on grease, but that's
 only for elements taken out of the assembly.
If you use it on the outside and don't take things apart, it can sneak residue
 inside. Something like ROR is much less likely to crawl around inside.
 If things are really greasy it might take multiple runs....but be patient and
 let a damp (not wet) absorber pull things away.

Jeff Swan

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Re: Cleaning EP
« Reply #7 on: January 11, 2018, 03:37:23 PM »
I have been afraid to use alcohol based cleaners on lenses since I ruined the coatings on a set of eyeglasses by using a Walt-Mart brand of alcohol based lens cleaner on them. The lenses are now blurred and rough in places. The store where I purchased them said they wouldn't replace the glasses, as they could tell by examining them that alcohol had been used on them. Sure enough, when I looked at the bottle of cleaner, it was an alcohol based cleaner. Fortunately I see the optometrist this month, and will get a new prescription for lenses.

I don't like dirty eyepieces, so I clean mine whenever they start to look dirty, using a water based lens cleaner applied sparingly to a micro fiber cloth, after blowing and brushing off everything loose.

freddormasa

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Re: Cleaning EP
« Reply #8 on: January 11, 2018, 03:51:48 PM »
Alcohol won't damage glass lenses, nor will it damage the coatings used on eyepieces.
It is a more effective solvent than water for cleaning organic débris off a lens.
There are cleaners more effective than alcohol, too, but they usually have additional additives like ammonia or soap in them (e.g.ROR or Nikon lens cleaner).
At star parties, I've occasionally used an alcohol wipe (like the small packages used in doctors' offices), followed by a silky microfiber cloth that was clean and never before used.

Noty Tarabori

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Re: Cleaning EP
« Reply #9 on: January 12, 2018, 01:08:29 PM »
Hello ,  I seem to remember Roland Christen is big fan of non scented tissues ,spit and windex , just saying .

Jeff Ramirez

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Re: Cleaning EP
« Reply #10 on: January 13, 2018, 03:08:21 PM »
I also use acetone, or original windex on a q-tip, if I'm out and depending on the contaminate. but with acetone, just don't use it on cheap eye pieces with plastic lenses or polycarb glasses, the good thing is that many of todays ep's are glass, metal and are anodized even right up to the edge of the lens so you wont damage or melt anything unless you get it on the rubber eye guard and even then its easy enough to wipe it off before might it damage (if at all).

poithegepur

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Re: Cleaning EP
« Reply #11 on: January 13, 2018, 11:32:31 PM »
I don't like homebrew stuff several recommended me here in Sweden.
I'm not keen either use acetone.
Alcohol sounds better. Is that ROR ?
I might try get that here.

I has this kit ;
https://www.bhphotov...aning_kit.html#!

I don't know what is in this cleaner spray. Do anyone know ?
There is also wet pads in kit, equal as 'kimwipes' ?

-Is it wrong clean off whit cotton ?
What I found out a issue is if I spray on a cotton ball and get it on lense ( not rotate, just up/down )
But when I try to remove it will be a mess hard to remove 'dry'.
But if I breathe on lense I need only some turns whit a cotton ball - then it is clean.
But one above mention on a article say never breath as spit ( can come.
But that’s the only way remove this spray.

It do works, I get it clean but I like clean stuff and if I often clean - I don't want to destroy my stuff.

I don't think this spray from Zeiss will hurt lense, I'm worry on my cotton polishing.

Marquise Nation

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Re: Cleaning EP
« Reply #12 on: January 15, 2018, 07:16:59 PM »
Regular Windex works, is likely already in the house, and improves the views of Jupiter some: I was able to see the alien base on Europa prepping for an earth invasion in my 80mm refractor. So, yes, Windex is good stuff.

naiciareamu

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Re: Cleaning EP
« Reply #13 on: January 21, 2018, 01:57:46 PM »
This is what I describe what one at Stellafane use.
He took his Ethos out of a box and polished direct on lense.
Just breath off dust and worked out whit this pen.
He said, don’t worry. Coatings is hard.

https://www.bhphotov...ml/prm/alsVwDtl

adviconno

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Re: Cleaning EP
« Reply #14 on: January 23, 2018, 01:23:22 AM »
Peter,

Ok, can I use regular glass cleaner ; don't know if Windex is sold in Sweden.

How do you polish it whit ?

( This is what Al Nagler used but he had no cotton, but only pin whit cotton in the end and that was to little cotton material to clean lense.

I think he told me to use pure cotton.