Eyepiece cleaning woes
Posted 29 January 2013 - 08:48 PM
Posted 29 January 2013 - 08:53 PM
It took mascara off (an eyepiece) that alcohol wouldn't touch.
Posted 29 January 2013 - 09:21 PM
Well, just be careful that your cleaning efforts don't cause any added damage...be cautious and don't do anything crazy! :o
One quick "war story"...a few years ago I bought a nicely-priced eyepiece from a guy who had cleaned it with R-O-R, a preferred formula at the time. He noted that there was a small sleek (not affecting viewing) that the R-O-R would not remove, and if it bothered me, I could return it. Well, a Q-tip dipped in 91% Isopropyl cleaned it right up, first swipe!
I rarely use anything other than 91% Isopropyl on my eyepieces. It works for me.
Posted 30 January 2013 - 12:16 AM
Ammonia 26° 0.775%
Sodium Chloride 0.830%
Isopropyl Alcohol 4.266%
Liquid Soap 9.011%
Distilled Water 85.118%
Obviously, it's the soap that removes the organic materials.
Change the alcohol and water contents, and it might be even better.
But I've cleaned a lot of eyepieces with 70% isopropyl, and ROR works better.
But it might be possible to improve on ROR by adding IPA to it.
Posted 30 January 2013 - 09:46 AM
Posted 30 January 2013 - 10:56 AM
Yes, the finger pad is absolutely safe, saliva too and is very efficient but there just are things, such are those bright specks, for what that isn't enough unless you keep pass on it, which I think is less safe than using a brand new lenspen in a single pass.
Acetone works wonders too, but it is not very safe on the edges where it can dissolve cell's paint, rubber and more taking them on the lens surface.
Just my experience.
Posted 30 January 2013 - 12:15 PM
I use the air bulb on an EP after every session. If there is more than a tiny amount of stuff on the lens, I use a q tip, in a "roll up as you go forward" motion, with fluids. One use and throw away. The trick on using q tips is you don't want to advance the q tip so fast as to leave a trail of liquid behind. This is particularly tough in very dry climates.
I try the weaker fluid first.
I avoid IPA from the drugstore after a weird experience with using a drugstore IPA that left a film that even acetone wouldn't take off. (it did come off with lighter fluid, which I tried in desperation.)
For me, the hierachy is ROR, Purosol and acetone.
I only use q tips when the lens is too small to use toilet paper. I spray the solvent on the paper wad and then use the same roll up motion, once, and throw away.
Avoid observing under trees!
Posted 30 January 2013 - 04:44 PM
Posted 30 January 2013 - 04:54 PM
They can clean eyepieces (spray a q-tip and then apply to the eyepiece, don't spray the eyepiece), and do a fairly good job of lifting eyelash oils.
However, they typically have a higher soap content than most commercial eyepiece cleaning solutions, so when they dry there can be some soap residue on the lens.
If so, a q-tip and water cleaning gets it right off.
Posted 06 February 2013 - 03:38 AM
After reading Starman's post about eyepieces may need cleaning when new I checked my new ES82's.
All looked pretty good till I looked at the bottom of my
30mm. Had small smudges right in the middle and at first thought it was a finger print from manufacturing. But realized the glass is very close to the rubber cap and the cap was leaving the smudges either from me touching the cap when it was on, which I highly doubt, or from storing standing up in my eyepiece storage case.
So going to pick up some hard caps and get rid of the rubber and also store it laying down for now. Love the ES82's I have but the rubber cap seems like a oversight.
Posted 06 February 2013 - 11:10 AM
Posted 07 February 2013 - 09:24 AM
The link said alcohol from the hardware store is ok.
Would that be "Isopropyl" or "Denatured" alcohol?
Acetone is used to strip finishes, paint, laquer etc. Too strong in my opinion.
Acetone will eat plastic and you don't want to spill any on your stained kitchen table, but it is an incredible optical cleaner.
Before I found the Televue instructions for acetone cleaning, I tried a number of cleaners and methods and was never really happy with the results. There was always a streak or residue and I felt like I had to go over the optical surface multiple times (risking damage). I have certainly scratched more than one eyepiece using a "lens pen" or "micro fiber cloth".
For the last five or six years, I have used acetone exclusively to clean optics. I use it everyday to clean my glasses--plastic lens with coatings. It only takes one pass to make them pristine with no residue left behind. I get the same results on all my optical telescope equipment (accept mirrors). Again . . . just keep it away from plastic (rubber is not an issue) and wood finishes.
Posted 07 February 2013 - 10:50 AM
Posted 07 February 2013 - 11:58 AM
I tried a number of cleaners and methods and was never really happy with the results. There was always a streak or residue and I felt like I had to go over the optical surface multiple times (risking damage).
Which solutions did you try that you weren't happy with? Did you try the Baader Wonder Fluid. Unfortunately I don't think we can get it in the US but it is supposed to be very good. I am also wondering if you tried Eclipse which is methanol. It has gotten great reviews and I just ordered some to clean my TEC objective. I also considered the acetone after reading the Televue article but decided to try the Eclipse first. Thanks, Kent
Posted 07 February 2013 - 04:04 PM
I thought acetone was amongst the best to clean optics but here he says by itself it won't clean anything off. Do you know what he means by that. He only uses it last to get rid of the swirl marks left from the other cleaners. Thanks
Posted 07 February 2013 - 05:02 PM
So, despite the fact most contaminants are easily dissolved in a solvent, the removal of the contaminants from the glass requires a surfactant to separate the dissolved contaminants from the glass, and an absorbent medium to wipe the dissolved contaminants and surfactant away from the glass and some form of medium that isn't so volatile it evaporates immediately. It's one of the reasons ROR is so effective: alcohol, ammonia, water, and soap. It doesn't dissolve too fast, so you have time to wipe it up.
I agree with Christen on acetone. It seems to be very effective at eliminating any swirls left from previous cleaning.
Posted 07 February 2013 - 05:16 PM
Posted 07 February 2013 - 05:22 PM
That removes *everything*
Posted 07 February 2013 - 06:29 PM
I boil my eyepieces in antifreeze. The full strength type, not the 50-50 mix.
That removes *everything*
Posted 07 February 2013 - 10:13 PM
6) Human spit. Ultimate remover of organic compounds from glass.
Posted 07 February 2013 - 10:23 PM
learning to leave them alone and limit cleaning frequency to rare and necessary occasion
Wiser words never spoken!
Posted 12 February 2013 - 08:29 PM
Posted 12 February 2013 - 08:45 PM
I think I saw the guy you got the 100% ethanol from on the show Moonshiners, My Grand pappy was rumored to be involved in that hobby.
I use 100% pure ethanol that I got from a guy I know who is a chemistry prof at a local college. Also, I believe that TeleVue knows how to clean eyepieces, and I have used acetone (as they recommend) without a problem. I wouldn't use acetone (or alcohol) on eyepieces that use plastics and/or paint, e.g. home made ones. That said, I have largely switched to ROR, finished off with a breath fogging and wiping with an unscented Kleenex. Really works well for me.
I got some micro fiber cloth at the Dollar Store and they
pull the smudgies and oil right off.
You can try the eyeglass cleaning cloths at the local Pearle too.
I also suggest a soft Camels hair brush to lightly remove dust.
The one drawback to using RKE eyepieces (or other Kellners)
is the field stop is right on the bottom lens and anything is magnified.