35mm adapter parts list

Jason Fox · January 5th, 2005, 07:43 PM

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

Richard Mellor · January 5th, 2005, 08:05 PM

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 · January 5th, 2005, 08:15 PM

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

Aaron Shaw · January 5th, 2005, 08:18 PM

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?

Jason Fox · January 5th, 2005, 08:27 PM

Richard, now I get it, thanks. I do mirror Aaron's question about the macro lens.

Fox

Jason Fox · January 5th, 2005, 08:30 PM

Let me reply to my own post -- you already answered my question about the diopters.

Say, what camera are you mounting this on?

Fox

Richard Mellor · January 5th, 2005, 08:38 PM

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 · January 5th, 2005, 08:43 PM

the camera is a $50 pawn shop special one chipper.
the hope is to put this on a high def homemade camera.

Fred Finn · January 5th, 2005, 09:07 PM

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.

Jason Fox · January 5th, 2005, 09:09 PM

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

Fred Finn · January 5th, 2005, 09:11 PM

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

Richard Mellor · January 6th, 2005, 07:30 AM

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.

Jason Fox · January 6th, 2005, 09:05 AM

Richard, I've seen the magnet trick and it works well. My question then is, what does the convex lens do? Thanks.

Fox

Richard Mellor · January 6th, 2005, 09:57 AM

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

Jason Fox · January 6th, 2005, 10:49 AM

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

January 5th, 2005, 09:07 PM	#24
Fred Finn 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.

January 5th, 2005, 09:11 PM	#26
Fred Finn 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.

January 5th, 2005, 07:43 PM	#16
Jason Fox 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

January 5th, 2005, 08:05 PM	#17
Richard Mellor 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

January 5th, 2005, 08:15 PM	#18
Richard Mellor 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

January 5th, 2005, 08:18 PM	#19
Aaron Shaw 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?

January 5th, 2005, 08:27 PM	#20
Jason Fox 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

January 5th, 2005, 08:30 PM	#21
Jason Fox 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

January 5th, 2005, 08:38 PM	#22
Richard Mellor 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

January 5th, 2005, 08:43 PM	#23
Richard Mellor 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.

January 5th, 2005, 09:09 PM	#25
Jason Fox 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

January 6th, 2005, 07:30 AM	#27
Richard Mellor 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.

January 6th, 2005, 09:05 AM	#28
Jason Fox 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

January 6th, 2005, 09:57 AM	#29
Richard Mellor 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

January 6th, 2005, 10:49 AM	#30
Jason Fox 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