LunaSol27 Sapphire Lens: is it AR coated on both sides?

maxspeeds · Sep 6, 2008

I read through the FAQ and every thread I could find on the LunaSol27, but could not find if the sapphire lens is AR coated on both sides. Does anyone know? If it is only 1-sided AR, like the original PD, is it possible to determine which side? I took my lens out to clean, but forgot which side was facing inwards :ohgeez:

. Thanks in advance!

JohnnyDeep · Sep 7, 2008

The AR coating is on the inside only.
You can find out by holding the window and looking at it against a light source from a small angle. Be careful not to touch the AR. Finger prints may be very carefully removed with a clean optical cloth. (The kind made for camera lenses).

McGizmo · Sep 7, 2008

Max,
What my friend Mr. Deep said.

maxspeeds · Sep 7, 2008

Thanks guys! You're the best

maxspeeds · Sep 7, 2008

Am I looking for a different tint/color that indicates which side has the AR? My eyes aren't 20/20 anymore, but both sides seem identical to me

Steve L · Sep 7, 2008

Hi Maxspeeds,
If you have access to a light meter, take a reading at 1 meter with the lens installed both ways. When you have it in the right orientation you should see ~200 lux increase.
Edit: I know it doesn't help you now, but in the future before you remove the lens put a small piece of tape on the outside of the lens. That way you will always know which side faces out.

cdosrun · Sep 7, 2008

Hi Maxspeeds,

if you don't have a light meter then look at the reflection of the lens at an angle. You will have two reflections of your light source, one coloured and one white; when the coloured reflection is closest to the source you are looking at the AR coated side.

Andrew

maxspeeds · Sep 7, 2008

Yeah, I don't have a light meter, but maybe I should buy one? Being a flashaholic without a light meter seems sacrilegious.

cdosrun,

Do you have a picture of what you're describing? I'm still quite confused. Thanks for all your guys' help though!

maxspeeds · Sep 7, 2008

Steve L said:
Edit: I know it doesn't help you now, but in the future before you remove the lens put a small piece of tape on the outside of the lens. That way you will always know which side faces out.

That's a good idea! I'll definitely do that next time.

starfiretoo · Sep 8, 2008

Be aware that cleaning sometimes removes coating...

octaf · Sep 8, 2008

cdosrun said:
Hi Maxspeeds,

if you don't have a light meter then look at the reflection of the lens at an angle. You will have two reflections of your light source, one coloured and one white; when the coloured reflection is closest to the source you are looking at the AR coated side.

Andrew

That's interesting.
So, the white one's closer to the light source when you're on non coated side?

knifebright · Sep 8, 2008

And of course i've ruined just about enough single sided AR Gizmo lenses to now swear by the Tape Method. Just a wee bit of tape of any kind (i prefer electrical) on the outside of the lens (the one facing away from the LED) before removal, sure does now decrease major frustrastion and head scratching upon re-assembly

Jimmy

You must be a Supporting Member to participate in the Candle Power Forums Marketplace.

LunaSol27 Sapphire Lens: is it AR coated on both sides?

maxspeeds

Flashlight Enthusiast

JohnnyDeep

Newly Enlightened

McGizmo

Flashaholic

maxspeeds

Flashlight Enthusiast

maxspeeds

Flashlight Enthusiast

Steve L

Flashlight Enthusiast

cdosrun

Enlightened

maxspeeds

Flashlight Enthusiast

maxspeeds

Flashlight Enthusiast

starfiretoo

Flashlight Enthusiast

octaf

Flashlight Enthusiast

knifebright

Enlightened

Similar threads

Latest posts