Mini 35 Competing Unit for a Lot Less $ - Page 5 at DVinfo.net

Go Back   DV Info Net > Special Interest Areas > Techniques for Independent Production

Techniques for Independent Production
The challenges of creating Digital Cinema and other narrative forms.


Reply
 
Thread Tools Search this Thread
Old July 11th, 2003, 01:12 PM   #61
Regular Crew
 
Join Date: Jun 2003
Location: Akron, Ohio
Posts: 65
I love that image, absolutely great!

I'm a very uninformed "noob" if you will, but I keep hearing people say that the 35 mill conversion doesn't work well with cameras with permanent lenses, such as your GL2 and my VX2000. Your tests seem to put that thought to shame, and I hope the same can be attained by my VX noting our similar lens setups.

Knowing that I'm totally uninformed, in theory could we in effect cancel out that we have lenses in front of our cameras? Bear with me now, but could you replicate the permanent lens structure of our cams in reverse and toss it in front of our cameras to take us down to a sort of "glassless state" like the Xl1? It seems a little fantastical and may introduce color abberations, etc., or maybe it just doesn't make any logical sense at all, but it just sounds like it may be crazy enough to work to someone who's clueless :). Who knows, maybe with your setup the glass in front of my camera won't instigate a problem, I'll just have to test and find out.

Oh yeah, I can't see very well what the philatelic lens(5x) looks like in your setup picture. Can you explain that to me, is it just a normal magnifying glass like any one you'd find?

Thanks for keeping the innovative stuff alive,
Spencer Houck
shouck@neo.rr.com
__________________
www.par-t-com.net > C'mon, you know you wanna click it.
Spencer Houck is offline   Reply With Quote
Old July 11th, 2003, 03:08 PM   #62
Major Player
 
Join Date: Sep 2002
Location: US & THEM
Posts: 827
eureka or maybe countach!


Cosmin

1 was the fresnel still necessary?

2 looks like I shall find a new use for the lenses from my Pentax LX kit :)
__________________
John Jay

Beware ***PLUGGER-BYTES***
John Jay is offline   Reply With Quote
Old July 11th, 2003, 11:09 PM   #63
New Boot
 
Join Date: May 2003
Posts: 15
Hey cosmin,

How did you invert your image? Did you do this in post or did you use prisms?

I took a canon eos camera apart and am using a skeletal version of it; problem is i didn't realize that canon eos lenses do not have a diagphram control it is controlled by the camera body (which i just finished destroying, UGH!) do these lenses default to being wide open? Or, will i be destroying a perfectly good lens?
Jaime Roman is offline   Reply With Quote
Old July 14th, 2003, 04:34 AM   #64
Major Player
 
Join Date: Feb 2003
Location: Romania, Timisoara
Posts: 453
Hi guys!

Spencer, why do you need that "glassless state" for your VX2000? Al you need is to focus the camcorder lenses onto the 35mm GG. For this you need a close up lens: a normal magnifying glass.

John, in this second test I didn't use a fresnell lens. The image is cropped on top and bottom (for a 16:9 or whatever look) and so the corners are left out. And so is the vigneting!

Jaime, I inverted the image in post. I don't have a prism. I don't know about the EOS lens. The lenses I use (Pentax K-mount?!) are wide open by default. The lens has a small lever that goes from the lens in the camera. Whatever aperture you chose, the lens stays open until you take the pic. Than the aperture is closed at the chosen level by switching that lever on the lens (yes, the camera does that). You can turn that lever by hand and see how the iris closes. I don't know if this is the case with the EOS lenses.
__________________
Cosmin Rotaru
Cosmin Rotaru is offline   Reply With Quote
Old July 14th, 2003, 07:56 AM   #65
Regular Crew
 
Join Date: Jun 2003
Location: Akron, Ohio
Posts: 65
Could you post some pictures of your newly updated rig, especially any with the camera set up on it also?

I seem to have a hard time focusing my camera on anything relatively close which is discouraging me a lot in recreating this great effect. I believe the GL2's minimum focusing distance is much shorter than my VX2000's. Hopefully I can get it all working.

Thanks,
Spencer Houck
shouck@neo.rr.com
__________________
www.par-t-com.net > C'mon, you know you wanna click it.
Spencer Houck is offline   Reply With Quote
Old July 14th, 2003, 09:11 AM   #66
Major Player
 
Join Date: Feb 2003
Location: Romania, Timisoara
Posts: 453
I'll see what I can do so I can take a pic "with the camera set up on" the rig.
The problem is that I use the camcorder to take the pics...
You'll see that the GG is not very close to the camcorder's lens. Look again at the pics I've already posted. Is the same setup but I use the rotating CD instead of the GG/fresnel sandwich. The magnifying glass allows zooming in the GG.
__________________
Cosmin Rotaru
Cosmin Rotaru is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Special Interest Areas > Techniques for Independent Production

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 07:51 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network