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BRIGHTNESS OF A SCOPE |
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countryboy
Optics Apprentice Joined: November/17/2007 Location: NORTH CAROLINA Status: Offline Points: 110 |
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Posted: June/02/2008 at 22:44 |
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THIS IS A DUMB QUESTION I KNOW,BUT I AM GOING TO ASK IT ANYWAY.WHEN YOU BUY A NEW SCOPE ,DOES THE BRIGHTNESS ,CLARITY OF THE SCOPE GO AWAY OVER THE YEARS/IF SO WHAT CAN BE DONE ABOUT IT/
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countryboy appreciates
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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Only if you damage the outer surface of the ocular and objective lenses or lens coatings, if the scope leaks, letting in condensation, or the scope receives abuse in some way to cause misalignment of lens elements. Otherwise, no.
Edited by RifleDude - June/02/2008 at 22:57 |
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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martin3175
Optics Master Extraordinaire Joined: January/19/2005 Location: Maryland Status: Offline Points: 3773 |
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Rifledude nailed it....proper care of the scope is paramount--no shirt sleeves used to push dirt out ,, stay clear of windex on the lenses ... etc.. use a lens pen / brush to gently remove debris, then a cleaner from the likes of nikon , Zeiss, etc made for lens coatings and a clean lens cloth .. Edited by martin3175 - June/03/2008 at 08:09 |
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mercenary1947
Optics Master ** Joined: April/02/2006 Location: United States Status: Offline Points: 1392 |
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Yea .... NEVER USE any cleaner with ammonia !!!! Best thing I've found are Flents wipe'n'clear pads . Safe for all lenses and coatings .... including cameras .... and are anti-fog also . You can carry a few in your pocket . I use them for my binos , glasses, scopes, GPS screen and goggles .... even on my lil windshield when it's on in the winter on my ATV to keep it from fogging up and snow from sticking to it .
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One Shot One Kill .... *S.O.F * Head Shots Only
SWFAM |
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Ed Connelly
Optics Retard God of no Chihuahua Joined: December/16/2007 Location: USA Status: Offline Points: 24225 |
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.............you mean, I can't clean my scopes with Windex and a old towel??? How 'bout if I use the elbow of my flannel shirt??
"Pretty smart, you damn gringos....pretty smart..."
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mercenary1947
Optics Master ** Joined: April/02/2006 Location: United States Status: Offline Points: 1392 |
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You'd be surprised Ed what I've seen people using .... spit and napkins for god's sakes ... one time ! I gave the guy a weird look I guess .... he said " It Works " Oh well ....
Edited by mercenary1947 - June/03/2008 at 14:09 |
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One Shot One Kill .... *S.O.F * Head Shots Only
SWFAM |
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Roy Finn
MODERATOR Steiner Junkie Joined: April/05/2004 Location: United States Status: Offline Points: 4856 |
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How many times have you read about a person using or wanting to use frickin Rain-X on optics?
Roy
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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I once saw someone use a toothbrush to make sure that the objective lens is REALLY clean.
ILya |
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martin3175
Optics Master Extraordinaire Joined: January/19/2005 Location: Maryland Status: Offline Points: 3773 |
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imagine what toothpaste to a lens would do .......followed by Ed's shirt sleeve and some Windex.....
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lucytuma
Optics Jedi Knight Joined: November/25/2007 Location: Wisconsin Status: Offline Points: 5389 |
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Good question, there must be a shelf life as to how long the optics coatings are good for, nothing lasts forever.
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"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not." - Thomas Jefferson
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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I'm not so sure that the various coatings used on the internal lens elements in many scopes won't degrade to some degree over a long period of time.
I can imagine that even the elemental lead in the glass would eventually oxidize, at least that near or at the surface of each lens.
Since Ted (Rifledude) seems to disagree, I am probably wrong, though!
On the subject of cleaning lenses, U.S. Optics says to use ACETONE ! That seems like an awfully harsh chemical to be using on coated lenses, but I have to take their word for it as being harmless. I have no doubts that it will get them clean...
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Ed Connelly
Optics Retard God of no Chihuahua Joined: December/16/2007 Location: USA Status: Offline Points: 24225 |
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" some cholo is saying bad things about mi serape! I theenk i weel kick heem in the backsides!!"
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Roy Finn
MODERATOR Steiner Junkie Joined: April/05/2004 Location: United States Status: Offline Points: 4856 |
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Well to answer the question more directly, get a set of Butler Creek scope caps and only use cleaners that are safe for use on multi-coated optics.
Roy
RifleDude is probably just saying that beyond the exterior of the ocular and objective lenses there is nothing you can do. Edited by Roy Finn - June/03/2008 at 19:28 |
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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OUCH!
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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What?
(That was actually a thinly-veiled compliment!)
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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thats why they make new ones, to replace the old ones
image degradation starts the second the coatings are applied, (UV light etc.)
use the same rules that applies to camera lenses
acetone is water with the two hydrogens replaced by two methyl groups making it less polar and less "ionic" far less punishing than water-- ever tried to dissolve salt with acetone. ???
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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Acetone is a very strong solvent for carbon-based contaminants (i.e. organic materials) like plastic. However, lens coatings are typically inorganic salts and oxides like magnesium fluoride, titanium dioxide, etc. Glass itself is really just silicon oxide, so it is impervious to acetone as well.
ILya |
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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Thanks Ron!
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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Dolphin
Optics Master Joined: October/05/2006 Location: North Carolina Status: Offline Points: 1795 |
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What is the chemical contained in the lens pens that are sold?
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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good question-- guessing here- ethylene glycol or some other low molecular wt. dissolved in isopropyl alcohol. |
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