Get bigger image with high quality optics / lenses? - AVS | Home Theater Discussions And Reviews
Baselworld is only a few weeks away. Getting the latest news is easy, Click Here for info on how to join the Watchuseek.com newsletter list. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more!


Forum Jump: 
 
Thread Tools
Old 05-07-2014, 11:55 AM - Thread Starter
Member
 
Future Cinema's Avatar
 
Join Date: Nov 2013
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13

Hi there

 

This may not be a question regarding CIT, but I figured if anyone here at AVS will now about it, it would be here! 

Simple question, is there a way of getting slightly bigger image using lenses in front of the projectors lens? If I'm not mistaking, I believe I've read something about fresnel lenses to make the image bigger, but I can't find that thread.

 

Any ideas? Or am I just being stupid?:rolleyes:

 

Best regards

/Pat

Future Cinema is offline  
Sponsored Links
Advertisement
 
Old 05-07-2014, 09:06 PM
AVS Special Member
 
trans_lux's Avatar
 
Join Date: Oct 2001
Location: In my theater
Posts: 1,021
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 90 Post(s)
Liked: 152
trans_lux is offline  
Old 05-09-2014, 02:05 PM - Thread Starter
Member
 
Future Cinema's Avatar
 
Join Date: Nov 2013
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13
Quote:
Originally Posted by trans_lux View Post

 

So the answer would be yes, with a fresnel lens! Right? Any specific ideas of how I would proceed from here? What kind of fresnel lens? Size? How do I mount? Potential problems?

Future Cinema is offline  
Old 05-12-2014, 08:31 AM - Thread Starter
Member
 
Future Cinema's Avatar
 
Join Date: Nov 2013
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13

Bump! Anyone? Aren't most fresnel lenses made out of poor quality plastic? I've searched the web a lot and I haven't found any examples of this, except people who mount fresnel lenses on their tv's. In theory it should work, but I haven't been able to prove it yet, seems like they are very hard to find. How big does it have to be? In my opinion, the bigger lens the less chromatic aberration.

 

Would appreciate any ideas!:)

 

/Regards

Future Cinema is offline  
Old 05-13-2014, 07:23 AM
AVS Addicted Member
 
stanger89's Avatar
 
Join Date: Nov 2002
Location: Marion, IA
Posts: 18,059
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 511 Post(s)
Liked: 267
You can get a Navitar (I think) converter lens to reduce throw/increase size I believe.

See what an anamorphoscopic lens can do, see movies the way they were meant to be seen
stanger89 is online now  
Old 05-15-2014, 05:22 AM - Thread Starter
Member
 
Future Cinema's Avatar
 
Join Date: Nov 2013
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 13
Quote:
Originally Posted by stanger89 View Post

You can get a Navitar (I think) converter lens to reduce throw/increase size I believe.

Thanks for the tip! Though it was pretty expensive, did almost cost more than my PJ:rolleyes: There must be a way to make a DIY Navitar lens to put infront of the projectors lens. Should be possible to take a old photo lens appart and use one of the glass lenses inside, a wide angle lens should work. See if I can get my hands on one.

Future Cinema is offline  
 
Thread Tools


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off