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View Full Version : do these things work ?


pro5ject
June 21st, 2003, 18:47
http://www.maxtheater.com/

I was wondering if ^ actually work, the lens and a tv thing, or not ? anyone tryed to make one ?
Bruce
June 21st, 2003, 19:12
I dunno... looks quite interesting though...
Coolin
June 21st, 2003, 19:30
Looks like a concave a lens and the idea of a pinhole camera at work here.
If you put an object between the focal length and the center of curvature, you can increase the size of the image.

The idea works, but I doubt the quality of the picture would be any good. Imagine the resolution of a 13 inch TV stretched to 150 inches. Ugly.
awayfromforum
June 21st, 2003, 20:31
It doesnt load the entire page for some reason. I get an entire blank part at the top.
Wojtek
June 21st, 2003, 21:55
i was once interested by that,
I did a little reasearch and managed to find some free websites that would offer free plans for this.

The magic is done when you put that little transparent sheet that inverts and magnifies the image. You have to be carefull to not be ----ed here. The majority only magnifies by 2x, you MUST buy one that magnifies 6x or more, or else your picture will look like a streamed movie off a 33.6kbs modem, you know what I mean, REally pixelated. If you buy a 6x or more, the same distortion occurs alot further then the 2x, so if you place both side by side, and the 2x pixelates at the wall then the 6x will pixelate way behind the wall, giving you a pretty good image on the wall compared to the 2x.

I hope you understood my little mixed up explaination :)
I'll have some time this summer so I'll be building it too
Daniel
June 22nd, 2003, 00:45
Originally posted by X-Istence
It doesnt load the entire page for some reason. I get an entire blank part at the top.

It doesn't work in Mozilla. :angry2:
Bruce
June 22nd, 2003, 00:48
I didn't even notice there was a top part of the page that was missing... I figured that was the way they made it. :confused2
tandoc
June 22nd, 2003, 01:06
i'd get it, apart from the fact i don't have the money for a TV or projector..
Dean
June 22nd, 2003, 10:25
Key Object: Frenzal Lens
pro5ject
June 25th, 2003, 16:23
Today I got the lens not from the site, but from a camera warehouse type place, and made a box for the tv to sit in.

The box is inside a cupboard and sticks out thru a hole I cut in the wall, approx 6ft of the floor, and projects onto a white wall (painted white espcially) at about 15ft distance, and I can tell you it works very well - just went out and got some new dvds espacially.


what I used -
A 6x lens thing
1 8ft x 6ft sheet of MDF (didnt use all of it)
1 15in tv
Glue
Screws
1x1in battens for the inside of the box - to secure it all
jmiller
June 25th, 2003, 17:02
Whird. I am glad to hear that it works, as I was looking to make one of those for somewhat of a summer project.
Though my tv is over 30" and thus the case for it would be pretty big and bulky.
pro5ject
June 25th, 2003, 17:07
Just one thing tho, you need the room very dark, I use some very thick curtains and a blind to do the job, almost pitch black.

I would have used my 32" tv, but I can't as I wouldn't be able to access the builtin dvd player.
Epgs
June 25th, 2003, 23:47
I have been looking at this over the past couple of days, are there any websites witht he plans for free that I could take a look at? Cause I don't understand from just what you are saying
Wojtek
June 26th, 2003, 01:33
simple:

take a 10" tv
flip it upside down
build a box around it with front open
slide in fresnel sheet (magnifier and flipper)
image projected on the wall
tandoc
June 26th, 2003, 02:34
or get 2 lenses?
pro5ject
June 26th, 2003, 05:34
This page will give you the idea of how to make it, it is rather amateur tho - http://bigscreentv.20m.com/photo.html