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Equipment Discussions >> Refractors

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teelgul
sage


Reged: 09/02/11

Loc: Australia
Re: Oil on bottom of my TEC 160FL Objective new [Re: jrbarnett]
      #5667289 - 02/07/13 03:23 PM

Quote:

I think Yuri would do himself a huge favor if he would post a pictorial guide on TEC's website showing how the TEC optical group is oiled, assembled and mounted in its cell. It might help alleviate some of the superstition about oil-spaced objectives.

Regards,

Jim





Same thoughts here.last couple of days i asked yuri questions about the same. btw jim have you experienced
difference in performance with temperature or its fluctuation on such oiled scopes.
regards
vaidya


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Darren Drake
Carpal Tunnel
*****

Reged: 10/09/02

Loc: Chicagoland
Re: Oil on bottom of my TEC 160FL Objective new [Re: Mike Clemens]
      #5667291 - 02/07/13 03:23 PM

Perhaps someone could post a youtube video on how to change the oil or re apply the oil. I'm not sure it's an easy thing to do and perhaps it's something to leave to the opticians but I would think it's not rocket science either...

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robboski2004
member


Reged: 01/14/08

Re: Oil on bottom of my TEC 160FL Objective new [Re: Darren Drake]
      #5667835 - 02/07/13 08:46 PM


I cannot believe TEC still have not made available portable
laminar flow benches, that they could post out to people, as long as they promise to ship them back when they have finished following the supplied oiling procedure.

Ian.


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CounterWeight
Postmaster
*****

Reged: 10/05/08

Loc: Palo alto, CA.
Re: Oil on bottom of my TEC 160FL Objective new [Re: robboski2004]
      #5667871 - 02/07/13 09:11 PM

I would want to at least have the collimation verified after any work on the lens oil, just as a confidence check.

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Scott in NCAdministrator
80mm Refractor Fanatic
*****

Reged: 03/05/05

Loc: NC
Re: Oil on bottom of my TEC 160FL Objective new [Re: robboski2004]
      #5667877 - 02/07/13 09:13 PM

Quote:


I cannot believe TEC still have not made available portable
laminar flow benches, that they could post out to people, as long as they promise to ship them back when they have finished following the supplied oiling procedure.

Ian.




I can't imagine any telescope manufacturer doing this.


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M13 Observer
scholastic sledgehammer


Reged: 12/09/06

Re: Oil on bottom of my TEC 160FL Objective new [Re: Scott in NC]
      #5668056 - 02/07/13 11:02 PM

Quote:

Quote:


I cannot believe TEC still have not made available portable
laminar flow benches, that they could post out to people, as long as they promise to ship them back when they have finished following the supplied oiling procedure.

Ian.




I can't imagine any telescope manufacturer doing this.




I kinda think this was tongue in cheek. If not . . .


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tomcody
Carpal Tunnel
*****

Reged: 07/06/08

Loc: Titusville, Florida
Re: Oil on bottom of my TEC 160FL Objective new [Re: robboski2004]
      #5669666 - 02/08/13 07:42 PM

Quote:


I cannot believe TEC still have not made available portable
laminar flow benches, that they could post out to people, as long as they promise to ship them back when they have finished following the supplied oiling procedure.

Ian.



If you can afford a TEC, you should have your own bench.


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mmalik
Postmaster
*****

Reged: 01/13/12

Loc: USA
Re: Oil on bottom of my TEC 160FL Objective new [Re: tomcody]
      #5670400 - 02/09/13 09:50 AM

Would it be correct to say that TEC has been having more oil related issues than AP?

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Jon Isaacs
Postmaster
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Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Oil on bottom of my TEC 160FL Objective new [Re: mmalik]
      #5670458 - 02/09/13 10:26 AM

In case the lens still needs cleaning, in this Astromart thread, Roland Christen documents with photos, how he cleaned a 130EDF.

Cleaning a dirty lens

Jon


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Kent10
Pooh-Bah
*****

Reged: 05/08/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: Jon Isaacs]
      #5670493 - 02/09/13 10:50 AM

Thanks Jon. I did see that and I have been doing quite a bit of research. I haven't cleaned the lens yet. I have my Eclipse fluid but am waiting on the wipes.

I have made notes for myself and this is what I have so far.

I am not sure about whether I will use gloves or not yet. It might be more difficult to do with the gloves. I will have Pec Pads and Opto Wipes. Opto Wipes are more absorbent than the Pec Pads so I am not sure which I will use first or if I can just use one or the other. Also I am not sure how far to go with each wipe. I read just 1 inch but have seen some go further. I am also not sure how I will do the edges because I think that is where the oil is and the closer I got to the edge when I first cleaned it the more oil I think I got on the micro fiber cloth. I will have to look at it again and see if there is much oil there and maybe clean that up first or stay away from it or see if I can get in there with a rolled up Pec Pad. Just not sure yet until I see it again.

My Personal Notes

Use Rocket Blower
Use Camel Hair Brush (one direction, no pressure)
Use powder free latex, nitrile or PVC gloves to hold pad so there is no oil from hand on the pad.
Fold Pec Pad to make thicker so there is no oil from hand if I donít wear gloves.
Put a drop or 2 of Eclipse on Pec Pad. Pad should not be dripping.
If very dusty (blower and brush did not remove all) do not drag pad but pat pad on lens to absorb dust first.
Gently drag pad over the lens in one direction for short distance (1 inch??). Start Center and then go to edges?
Dispose pad.
New pad.
Use saliva with clean finger if necessary but donít let it sit on lens and clean up quickly. (I doubt I will need to do this)
Final step--use breath on lens, then wipe with clean cloth to buff.
Do not use cloth where fingers have been.
Q tips are used by many but many also donít recommend them because they can be harsh or the stem can contact lens.

About Eclipse Fluid...

If you use Eclipse fluid it is best to always keep a new, sealed bottle on hand that you can use if your current bottle ever absorbs moisture such that it leaves residue. Exotic chemicals need to be treated carefully, just the same as expensive lenses do.

My understanding is the eclipse fluid is just methanol. I caution everybody that methanol is a solvent that absorbs water from the atmosphere ... if water get's into the solvent, then when you are cleaning the lenses/sensor's you are applying small water droplets as well ... which in photography will probably be transparrent and won't affect the final image. However, being persnickery as I am, I like to see all my optics that I clean to be "squeaky" clean.


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Scott in NCAdministrator
80mm Refractor Fanatic
*****

Reged: 03/05/05

Loc: NC
Re: Oil on bottom of my TEC 160FL Objective new [Re: Jon Isaacs]
      #5670510 - 02/09/13 11:01 AM

Quote:

In case the lens still needs cleaning, in this Astromart thread, Roland Christen documents with photos, how he cleaned a 130EDF.

Cleaning a dirty lens

Jon




Thanks for sharing that interesting reading, Jon. I must have missed that AM thread, but have it bookmarked now for future reference.


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Kent10
Pooh-Bah
*****

Reged: 05/08/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: Scott in NC]
      #5670632 - 02/09/13 12:18 PM

To add to my post above. I have been thinking about how to fold the Pec pad without getting finger oil on it. I have come up with these 2 ways.

1. a. Fold a single sheet of lens paper in half lengthwise, twice. Hold the sheet along its short ends only and do not touch the center.
b. Fold the resulting 3/4" wide strip in half by gently poking its center point.

2. I remove the pad holding it from a corner, and then gather the four corners together forming a small "balloon" of pad material.


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blueman
Photon Catcher
*****

Reged: 07/20/07

Loc: California
Re: Oil on bottom of my TEC 160FL Objective new [Re: Kent10]
      #5670804 - 02/09/13 01:46 PM

I fold the pad and the Opti-wipes all the time. First thing, go down to the local camera shop and see if they sell the inexpensive cotton glove from handling photos and lenses. These work well and eliminate oils.
If not, just use sugical gloves. Put them on and then wash them with liquid soap and rinse. Dry with a clean towel and you will not have any oils, powder or whatever.
I use the corner of a folded Opti-Wipe to get to the edges of the lens. Pec-Pads will work, but I have to use Opti-Wipes afterward to clean up.

As you said, get all dust off first with air, if possible. Then if needed a VERY LIGHT wipe with a dampened opti-wipe will remove the rest.
Do not use too much fluid, it will run around the edge of the lens. Use just enough to get it clean.
Blueman
Quote:

To add to my post above. I have been thinking about how to fold the Pec pad without getting finger oil on it. I have come up with these 2 ways.

1. a. Fold a single sheet of lens paper in half lengthwise, twice. Hold the sheet along its short ends only and do not touch the center.
b. Fold the resulting 3/4" wide strip in half by gently poking its center point.

2. I remove the pad holding it from a corner, and then gather the four corners together forming a small "balloon" of pad material.




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Kent10
Pooh-Bah
*****

Reged: 05/08/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: blueman]
      #5670833 - 02/09/13 02:16 PM

Thanks for the help, Blueman. I have these powder free gloves http://www.amazon.com/gp/product/B000JFJLWE/ref=oh_details_o07_s00_i00

I haven't used them for anything yet so I don't know how they will feel. I shouldn't have to wash these, should I, if they are powder free or are there other things that could be on these gloves. It doesn't say they are sterile. I would have to be careful how I put them on so as not to contaminate them.

At least the bottom of my objective doesn't have much dust on it. Just that oil or whatever it is. Still not sure. The front of my objective has a very light coating of dust that you can see with a light at an angle but I think I will leave it for now. I will eventually want to clean it too but I don't need to keep it pristine. I hope I can get the bottom though looking like it was new.

Thanks again for all your help.


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steven40
member


Reged: 02/01/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: Jon Isaacs]
      #5671133 - 02/09/13 06:01 PM

a few years ago I cleaned my AP160, and it went very well. Here's a link:

http://tech.groups.yahoo.com/group/ap-ug/message/43798?threaded=1&l=1

Roland replied "You did it right!".


Steve


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Kent10
Pooh-Bah
*****

Reged: 05/08/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: steven40]
      #5671168 - 02/09/13 06:31 PM

Thanks Steve. I enjoyed reading about your cleaning experiences.

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teelgul
sage


Reged: 09/02/11

Loc: Australia
Re: Oil on bottom of my TEC 160FL Objective new [Re: Kent10]
      #5671403 - 02/09/13 08:43 PM

http:// www.bhphotovideo.com/indepth/photography/tips-solutions/how-clean-your-lens-a...
http://forums.dpreview.com/forums/post/3045081



Some like the above even advise against facial tissues due to presence of wood fibre.micro fibre may be better . caution with acetone especially near
Edge ,seal area as its a strong solvent , and will react with rubber ,plastic,paint .isopropanol may be better choice .for water soluble stain only ammonia free
Windex or spit will do the job !

Edited by teelgul (02/09/13 09:04 PM)


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Kent10
Pooh-Bah
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Reged: 05/08/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: teelgul]
      #5671691 - 02/10/13 12:57 AM

Thanks Teelgul. Yes acetone would be risky for me cleaning to the edge of the lens. I expect the Eclipse I bought which is pure methanol should be fine.

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Kent10
Pooh-Bah
*****

Reged: 05/08/12

Re: Oil on bottom of my TEC 160FL Objective new [Re: Kent10]
      #5679367 - 02/14/13 12:31 PM

Update:

I tried cleaning the bottom of the objective with Eclipse and Pec Pads but it is making it worse. I am not sure what is on the lens but oil or grease of some sort. It must be quite thick. When I clean it, it just moves it around and looks cloudy. I can buff it with a new micro fiber cloth (no fluid) but it takes a little pressure to get it to come out and it is very difficult to remove so I left it for now. And even with the MF cloth it isn't completely removing it. I am waiting on the Opto-Wipes that Roland C uses. They are supposed to be absorbent so maybe these will work better. It is going to be especially hard to clean around the edges. Does anyone think that ROR fluid might work better. I'll try these absorbent Opto-wipes first and if that doesn't work maybe ROR. What do you think? Thanks for any help.


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Jeff B
Carpal Tunnel
*****

Reged: 12/30/06

Re: Oil on bottom of my TEC 160FL Objective new [Re: Kent10]
      #5679515 - 02/14/13 01:41 PM

Have you tried spit?

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