Nitecore MT40 with Aspherical Lens (IMAGES)

James3 · Jul 4, 2013

I decided to stick an aspherical lens in a Nitecore MT40!

Heres my results:
(iv'e only just done the mod and it still has a bit of insulation tape holding it together!)

I also do not have any outside beam shots yet as its still light here in the UK:duh2:

tobrien · Jul 4, 2013

not bad at all. how's the distance when outside?

James3 · Jul 5, 2013

Improved a lot, the beam profile is a lot thinner but also travels a lot further, comparing it to Nitecore's specs of 363m I would say it is now about 450-500m, it does still have a tiny bit of spill which is useful, most of the light is now focused in the shape of the die but slightly blurred, so looks almost round which is what I was after!

StyXSIS · Jul 5, 2013

What was the added lens taken from james.

NITECORE 1 · Jul 5, 2013

Just curious about the distance the light can reach after modification. It seems like the beam is more focused but narrower.

tobrien · Jul 5, 2013

James3 said:
Improved a lot, the beam profile is a lot thinner but also travels a lot further, comparing it to Nitecore's specs of 363m I would say it is now about 450-500m, it does still have a tiny bit of spill which is useful, most of the light is now focused in the shape of the die but slightly blurred, so looks almost round which is what I was after!

that's always a good thing when your own DIY mod turns out just how you wanted it

James3 · Jul 5, 2013

StyXSIS said:
What was the added lens taken from james.

Just a cheap one i bought of DealExtreme

James3 · Jul 5, 2013

NITECORE 1 said:
Just curious about the distance the light can reach after modification. It seems like the beam is more focused but narrower.

Yep its a lot more focused and a lot narrower but seems to have a much better throw, and a tiny bit of spill, ill put on some beamshots now.

James3 · Jul 5, 2013

Here's a beamshot of the MT40 with the Aspherical lens (pictures not great as they are taken on my phone)

I also had a mess around with another lens and came up with this:

edgar · Jul 5, 2013

so you basicly remove the glass , and put the lense over the reflector ?

James3 · Jul 5, 2013

edgar said:
so you basicly remove the glass , and put the lense over the reflector ?

Nope, I removed the standard glass lens and the reflector then put the aspherical on

StyXSIS · Jul 6, 2013

Ah, i see, you've answerd my other Q's so thanks.

edgar · Jul 6, 2013

Cool , its giving lot of idea ,
Do you know how to choose the size of the lense , are the bigger one better , or does it have to match the led size some how ?

James3 · Jul 6, 2013

edgar said:
Cool , its giving lot of idea ,
Do you know how to choose the size of the lense , are the bigger one better , or does it have to match the led size some how ?

To be honest I just go with old fashioned trial and error, I took the original lens out and measured it, then bought a couple that fit the measurements and wacked them in to see which one would be best.
Suppose you could work it out all mathematically but I can't be bothered with all that!
Plus the lenses are hardly expensive and with free shipping you can't go wrong

TEEJ · Jul 6, 2013

If you adjust the depth of the lenses, you can sharpen the die image and improve the throw.

A spacer ring, etc, can be added to the mount, shaved off, etc, to obtain the ideal depth.

I found that just holding the lens in front of the light, and moving it in/out to see the depth that works best, is all that's needed for that.

Here's an SC600 (NOT known for throw) shining through a lens as an example:

As you can see, the ideal depth location is far ahead of the original bezel. A spacer would therefore allow the aspherical lens to focus better and throw farther.

James3 · Jul 7, 2013

TEEJ said:
If you adjust the depth of the lenses, you can sharpen the die image and improve the throw.

A spacer ring, etc, can be added to the mount, shaved off, etc, to obtain the ideal depth.

I found that just holding the lens in front of the light, and moving it in/out to see the depth that works best, is all that's needed for that.

Here's an SC600 (NOT known for throw) shining through a lens as an example:

As you can see, the ideal depth location is far ahead of the original bezel. A spacer would therefore allow the aspherical lens to focus better and throw farther.

Yep I've done that I've put it a bit further off to make the beam slightly rounded and less square it doesn't look very good when you can see an exact copy of the chip in the beam, in my opinion anyway, but as in my post above if you put an aspherical lens on a light and then shine it through a convex lens you get a perfect circular spotlight, the throw is decreased but it does look awesome at night

Nitecore MT40 with Aspherical Lens (IMAGES)

James3

Enlightened

tobrien

Flashlight Enthusiast

James3

Enlightened

StyXSIS

Newly Enlightened

NITECORE 1

Newly Enlightened

tobrien

Flashlight Enthusiast

James3

Enlightened

James3

Enlightened

James3

Enlightened

edgar

Newly Enlightened

James3

Enlightened

StyXSIS

Newly Enlightened

edgar

Newly Enlightened

James3

Enlightened

TEEJ

Flashaholic

James3

Enlightened

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