35mm adapter parts list - Page 2 at DVinfo.net

Go Back   DV Info Net > Special Interest Areas > Alternative Imaging Methods

Alternative Imaging Methods
DV Info Net is the birthplace of all 35mm adapters.


Reply
 
Thread Tools Search this Thread
Old January 5th, 2005, 07:43 PM   #16
Regular Crew
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 37
Richard, I was completely confused by your last post. :-) I've been looking at other designs for static adapters and those use diopters to allow your video cam lens to focus on the GG. Yours, more eloquently I'm guessing, uses the convex lens. How are the GG and convex lens set up inside the tube in relation to each other and in relation to video lens? Or should I just send you a check and let you worry about that? Thanks.

Fox
Jason Fox is offline   Reply With Quote
Old January 5th, 2005, 08:05 PM   #17
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
If you were holding the tube in your hand the first part in would be retaining ring . next ground glass frosted side up then flatside of plcx on top then retaining ring
Richard Mellor is offline   Reply With Quote
Old January 5th, 2005, 08:15 PM   #18
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
this is a picture of the first adapter I made with filter rings.
the plcx was a square cut . the thorlabs version will be even sharper than this. this is what your camera will see. the diopters will only come into play if your camera cannot focus on this image

http://www.dvinfo.net/media/mellor/3...20test%202.jpg
Richard Mellor is offline   Reply With Quote
Old January 5th, 2005, 08:18 PM   #19
Major Player
 
Join Date: Jul 2004
Posts: 587
Richard, one thing I cannot fully determine from the images and description is whether we would need to provide a macro lens. I presume that would be necessary?
Aaron Shaw is offline   Reply With Quote
Old January 5th, 2005, 08:27 PM   #20
Regular Crew
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 37
Richard, now I get it, thanks. I do mirror Aaron's question about the macro lens.

Fox
Jason Fox is offline   Reply With Quote
Old January 5th, 2005, 08:30 PM   #21
Regular Crew
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 37
Let me reply to my own post -- you already answered my question about the diopters.

Say, what camera are you mounting this on?

Fox
Jason Fox is offline   Reply With Quote
Old January 5th, 2005, 08:38 PM   #22
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
this is a still from the first adapter . the problem was not getting the plcx directly on the ground glass . the thorlabs version is improved. with better opto sigma glass.

this was shot with only the adapter as you saw it my camera did not need a macro.

http://www.dvinfo.net/media/mellor/PDVD_540.BMP
Richard Mellor is offline   Reply With Quote
Old January 5th, 2005, 08:43 PM   #23
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
the camera is a $50 pawn shop special one chipper.
the hope is to put this on a high def homemade camera.
Richard Mellor is offline   Reply With Quote
Old January 5th, 2005, 09:07 PM   #24
Regular Crew
 
Join Date: Jan 2004
Location: Jackson, WY
Posts: 178
I have some footage with this GG and Cnvx lens. I made the tube out of PVC.
http://hazardousproductions.com/films/chron_frd.mov
right click save link as.

I did have to use a macro on my gl-1.
__________________
i am the muffin man.
Fred Finn is offline   Reply With Quote
Old January 5th, 2005, 09:09 PM   #25
Regular Crew
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 37
Nice shot. Can't wait to assemble one and mount in on my DVX.

One question more: Would you get even more light into your camera if you didn't use the convex lens and just flipped the image in post?

Fox
Jason Fox is offline   Reply With Quote
Old January 5th, 2005, 09:11 PM   #26
Regular Crew
 
Join Date: Jan 2004
Location: Jackson, WY
Posts: 178
The convex does't flip it.... To be honest i'm not really sure what it does, besides cost $30.00. I haven't experimented without it.

Here's a pic of the rig http://hazardousproductions.com/images/lens.gif
__________________
i am the muffin man.
Fred Finn is offline   Reply With Quote
Old January 6th, 2005, 07:30 AM   #27
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
when the time is right. many people have found ways to flip the image on the viewfinder. the dvx100 just requires a small magnet placed near the lcd and it flips the image. then transform in after effects will do it in post.
Richard Mellor is offline   Reply With Quote
Old January 6th, 2005, 09:05 AM   #28
Regular Crew
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 37
Richard, I've seen the magnet trick and it works well. My question then is, what does the convex lens do? Thanks.

Fox
Jason Fox is offline   Reply With Quote
Old January 6th, 2005, 09:57 AM   #29
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
not being an expert on optics . the diffuser starts to scatter the light the plcx brings it back

http://www.edmundoptics.com/techSupp...?articleid=267
Richard Mellor is offline   Reply With Quote
Old January 6th, 2005, 10:49 AM   #30
Regular Crew
 
Join Date: Nov 2004
Location: Dallas, TX
Posts: 37
I think I actually understood some stuff on that lens theory site. Another question just occured to me: where at in the tube do you place the lenses? Also, I'm assuming this whole thing requires step rings to go from camera lens down to 55mm and the 55mm to 58mm on the still lens side, correct?

Fox
Jason Fox 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 > Alternative Imaging Methods

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:09 PM.


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