How can you get a magnifying glass effect with cycles.

Support Modeling
1

I’ve been trying for days now but with no luck,i want to make a sniper scope with varying levels of magnification like a real scope (It should be adjustable during animation)

Is something like this possible with cycles?

2

New CorelDRAW X5 Graphic (2).jpg1285×736 177 KB

This is what i have so far.

i don’t know how to make a real lens in cycles.

3

try this one
lensmat2661.blend (300 KB)

happy cycles

4

Still not what i’m looking for,it’s supposed to enlarge the whats being seen through the scope.Yours is making it slightly smaller.

Here is what i have so far,the small blue cube should be magnified when looking through the scope.

Basically what i’m trying to make is an objective lens and an ocular lens.

Attachments

Gag glass Mk2.blend (573 KB)

5

almost samething

zz3.jpg1200×800 116 KB

zz2.jpg960×1152 293 KB

depends on distance and focal lenght
but difficult to control that !

salutations

6

Except it’s not magnifying the image.

7

i do remember seeing magni if you put an object inside a glass cylinder !
but that’s not really what you want here !

be back later on !

salutations

8

K,thx for the help anyway.

I’ll keep trying.

9

I’m not sure how you would fake the effect (it might require compositing?) but modelling a physically correct lens and using a plain glass material should do it. Mind you I didn’t make a physically correct one for this example, but it is magnifying. The fresnel setting of the glass material affects the amount of distortion in the lens.

Lens.jpg800×447 126 KB

Edit: Keep in mind the kind of magnification you get from a scope is the result of more than one lens.

10

I was playing with this the other day. Thats what I got: http://youtu.be/1AsD_y3xhzI

In your case, maybe you can just do it in compositor, with lens distortion, as you dont need caustics. Just make a circular mask to select what you want to distort.

11

A sniper scope does not have one single lens, it’s a combination of lenses http://upload.wikimedia.org/wikipedia/commons/1/12/Telescopic_sight_internals.png

12

@Storrboy & Netich

That’s exactly what i was looking for,thx for the help

13

can you uplaood a sample file
i cannot redo it

i see smaller image then bigger one !LOL

thanks

14

Hi all

I am trying to recreate this effect, but am having little luck. If anyone can point out what I am doing wrong I would be very grateful.

mag.blend (1.36 MB)

Thanks

Swest

15

It’s hard to explain but it doesn’t want to seem to work with a normally modeled glass.

What i did was paste a UVSphere and then scale it along the angle of the 2 center points,add smooth,subsurf and a glass material.

Attachments

mag2.blend (1.42 MB)

16

can you eleaborate how you scaled it ?
with 2 centers waht do you mean

thanks

17

Here,hope the image works.

Attachments

New CorelDRAW X5 Graphic.jpg1942×2300 254 KB

18

i tried many times but does not magnify a lot
let me do a test with a parabola instead and see what it gives

did a test wiht a parabola
and it does magnify a lot more like a real lens
but text object is also revverse!
have to find how to reverse it !

thanks

19

You need to add loop cuts and scale a few parts so it looks more the a normal magnifying glass to get a better effect.

20

Thanks DC, that works better. Do you have any intuition as to why your method is more effective? It seems quite bizarre particularly given how my original model had a smaller radius of curvature so you’d expect a greater degree of refraction.

Cheers