View Full Version : anyone still using thier fresnel lens?

05-19-2007, 04:49 PM
the thread i was looking at was about the huge multipanel screens. i had a link to a "viewstation" that was half a sphere, for gaming/3D work, but i cant find it. but it got me thinking about us fresnel lens users. and i didnt want to hijack the thread.

SO...just wondering if those who have purchased a fresnel lens in the past few years, are still using it? did you put it up? throw away? or use outside for science projects, and now have a fine to pay for starting concrete on fire. http://forums.ubi.com/images/smilies/784.gif

mine rarely ever comes off. maybe im just used to it. as important to me as track-IR, and the joystick.

for those that dont know what the lens is for, and want to know more. ..heres a horrible linky i did a while back.http://forums.ubi.com/eve/forums/a/tpc/f/23110283/m/6541015234/p/1

05-19-2007, 06:52 PM
I never got a good enough mounting solution...

05-19-2007, 08:38 PM
I have a 19 inch screen what size would work best?

05-19-2007, 09:37 PM
The one I have.. Ill sell it to you for $20... Still have the original packaging too.... not a scratch on it.. let me know.

05-19-2007, 09:56 PM
Looking through my 3DLens F550 right now. Bought it about a year ago and fabricated a hood for it using black foam board from an office supply store. Mounts over the top of my LCD monitor using self-stick velcro.

I like it.

05-19-2007, 11:09 PM
Originally posted by Bearcat99:
I never got a good enough mounting solution...

what are we talking about? http://forums.ubi.com/images/smilies/winky.gif

05-20-2007, 12:18 AM
http://forums.ubi.com/groupee_common/emoticons/icon_eek.gif http://forums.ubi.com/images/smilies/59.gif http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif


05-20-2007, 01:17 AM
blood splat,

i have a 19 inch monitor as well, with an F350 LENS. the focal point is fairly close/strong, meaning i have to have my face fairly close to the lens. not more than a foot away to get the entire image "in the box".

for optimal effect though, about 6-9 inches away.(for me and my setup)

you might get something with a focal point that is a bit further away. if i rmemember correctly you can get the largest size lens 3DLENS offers, but in a variety of focal points. (the "350", "550" of the lens types, are focal point distance, in millimeters )

05-20-2007, 01:02 PM
I still use mine. I find it very nice for flight sims, racing, and first person games where things move alot. For games with more static images, such as strategy games, the blurring/distortion near the edges gets a little annoying. Still, now that I'm used to it things just look goofy if I play without it.

I have the F550 setup 20cm from a 19" monitor. I sit so my eyes are 70cm from the lens. At this distance the image is large enough that the edges of the screen are cut off a bit so I should probably sit a bit closer, but I'm too lazy to modify my simpit to move the seat closer. I had originally built it to suit a 17" monitor.


05-23-2007, 05:47 PM
I have a 19" flat-screen CRT, and in the past used a 7" x 9" flexible page magnifier. Its focal length is 12", and I mounted it in an open foam board frame so as to hold the lens curved in the horizontal direction, concave toward my face, and about 8-9" from the screen. The small size required looking into it from a fairly close distance, but the HUGE apparent field of view of 90-100 degrees really pulled me into the game.

But now I use +3.5 diopter reading glasses of focal length 11" (WITHOUT all the problems some folks seem to be scared of http://forums.ubi.com/images/smilies/mockface.gif ) because the view is much sharper and more contrasty than any fresnel lens. The apparent foeld is also a bit smaller (about 75-80 degrees), but it's worth the trade-off in clarity. And I got the glasses at a Dollar store for $2.

Looks like you could add a shelf extension so as to pull the monitor closer to you. In my setup, the monitor is actually *above* my stick and throttle (so that I can view it from close up with my strong reading glasses.)


05-24-2007, 05:47 AM
Yes - use lens all the time on games machine.

I use a simple functional mounting.

Lens is fitted to wooden picture frame which has hole drilled in each corner.

I take four lengths of 5mm threaded stud, put nut on end of each and attach to front of screen with epoxy paste.

Then put nut on each stud, fit lens frame and nut on each to hold in place.

This way by screwing in and out the nuts I can make sure lens is exactly parralel to screen and move it in and out till I'm happy about focus.

I can also access both front and back of lens and screen via side for cleaning or button pushing.

Lens can be removed in about 1 minute.

Drawback is that it looks a bit ugly.

550 lens was fitted to 19" CRT - very nice, now it's fitted to a 22" CRT that I picked up for 20 Euros.

When yr nose is in front of it it looks huge and I no longer get cronic eye fatigue after 2 hours flying.

Total cost of screen + lens + mounting was about 80 Euros so I will live with ugly.