Aspheric lens on a mag85?

[poormanq45]

I did a brief search and couldn't find much information, other then starting fires...

Which aspheric lenses will work with a Mag85, and what will be the end result of this setup?

Thank you

 

[Pokemonrules]

Aspheric will not really work with any incandescent bulbs. you can try it (I have) , with the right focus you will get a image of the filiament, does not really do you any good. It looks like you project a image of a spring on the wall. Aspherics are best used with LEDs

I did a brief search and couldn't find much information, other then starting fires...

Which aspheric lenses will work with a Mag85, and what will be the end result of this setup?

Thank you

 

[poormanq45]

I found a good thread with a good amount of information.

http://www.candlepowerforums.com/vb/showthread.php?t=179681

If i'm reading correctly, if you use a bifocal lens you can smooth out the filament image. Combine this with the properly focused lens and you've got a super thrower.

Am I reading that correctly? Or am I missing something?

 

[Illum]

Aspheric will not really work with any incandescent bulbs. you can try it (I have) , with the right focus you will get a image of the filiament, does not really do you any good. It looks like you project a image of a spring on the wall. Aspherics are best used with LEDs

for vertical filament lamps it'll look somewhat better, but they are in itself artifacts and the reflector will contribute alot of artifacts as well

 

[bobo383]

I found a good thread with a good amount of information.

http://www.candlepowerforums.com/vb/showthread.php?t=179681

If i'm reading correctly, if you use a bifocal lens you can smooth out the filament image. Combine this with the properly focused lens and you've got a super thrower.

Am I reading that correctly? Or am I missing something?

Indeed, it appears to be doable from reading that thread. I haven't had to think that hard about optics since I got my physics degree in 1991. Now I need to do some reading.

I had tried aspheric with incan before, got image-of-the-filament results, and gave it up.

 

[lctorana]

with the right focus you will get a image of the filiament, does not really do you any good. It looks like you project a image of a spring on the wall.

And that's supposed to be a BAD thing?:thinking:

 

[fivemega]

Aspheric will not really work with any incandescent bulbs. you can try it (I have) , with the right focus you will get a image of the filiament, does not really do you any good. It looks like you project a image of a spring on the wall.

And that's supposed to be a BAD thing?:thinking:

[size=+1]Etching top of the bulb will smooth out the image shape.[/size]

 

[Pokemonrules]

And that's supposed to be a BAD thing?:thinking:

Ok, sure it works, the aspheric lens will make a hotspot of the filament.
But based on my testing, which I made just now middle of this post, beam of Mag85 to some trees 100m away.
The hostspot was brighter and bigger using Fivemega 2,5" throwmaster than with 52mm shurplusshed aspherical...

My conclusion is that there is no use of having apherical with Mag85.
Would be interesting to see / try results witht the way Fivemega suggested above...
If anyone has different results, happy to hear about them.

 

[poormanq45]

Since you are able to test the Mag85 with an Aspherical lens.

How does the throw compare to a Mag85 with a regular borofloat lens?