Another Purely optical adaptor discussion

Igor Babic · October 12th, 2007, 03:52 AM

http://www.dvxuser.com/V6/showthread.php?t=100591

dimeter 51,5mm, focus129mm?

Jon Wolding · October 12th, 2007, 09:57 AM

How is this new adapter a "Purely Optical Adapter"?

It uses a LSD screen (Light Shaping Diffuser). Interesting, but it should be in it's own thread.

Rich Hibner · October 12th, 2007, 02:00 PM

Thanks for the link. I actually have been through dozens of LSD screens and found out that the screen from cell phones work the best and if you have a broken one lying around, it doesn't cost you anything. I have video of my LI-35 on a different thread.

"How is this new adapter a "Purely Optical Adapter"?
It uses a LSD screen (Light Shaping Diffuser). Interesting, but it should be in it's own thread."

To clear up some confusion the 2video's you've seen on this particular thread had NO ground glass. It was exactly as described in the video and in my post. Igor had posted a screen grab from a thread that used Light Shaping Diffuser which I called "Li-35". I used the same spacers and achromats from my previous adapter for this. I can see where you think that this had used a LSD screen.

The achromats were 51mm 129fl. I found him through another guy here on Dvinfo that posted his spinning DIY adapter.

Jon Wolding · October 13th, 2007, 10:50 PM

How were you able to avoid CA with your all glass setup?

I mean, JVC couldn't do it... what's your trick?

Igor Babic · October 14th, 2007, 09:22 AM

I have try it, but result is at least strange. Very hard to focus on moving objects. It is not so shallow DOF on objects that are over 1.5m away (It looks like something under 16mm camera, but you can tweak it in combination with both focus rings). FOV is different then on regular adapter because it depends of how low is f number. When you closing your lens apperture you actualy closing FOV. It shows some potential, and picture is bright and sharp. But this is not an 35mm adapter. More like some sort of macro. Interesting experiment.

Rich Hibner · October 14th, 2007, 01:25 PM

Beats me. You see what I see.

Igor's statement is pretty accurate. The dof is just under 16mm depending on distance.

Daniel Apollon · October 20th, 2007, 12:53 AM

Perhaps this optical taper could be of interest:
http://incomusa.com/uploads/tapers_b...icial%26sa%3DN

Rich Hibner · October 21st, 2007, 12:32 AM

that looks very interesting..how much does that go for? and how would you be able to calculate what mm you would need? where are the experts at?

Peter Chung · February 4th, 2008, 03:33 PM

Quote:

Originally Posted by Rich Hibner

right click save as:
http://www.fileden.com/files/2007/1/...6/QuickTut.mov

I'm unable to download your Tutorial. I get a message saying:

This is a private file.
Only the owner can view it or download it.

Is it possible to "publicize" your video? Pretty please?

Thanks!
Peter

Rich Hibner · February 8th, 2008, 10:39 AM

should be public. just make sure to save as.

October 12th, 2007, 03:52 AM	#16
Igor Babic Regular Crew Join Date: Dec 2006 Location: Zagreb, Croatia Posts: 171	Here is how http://www.dvxuser.com/V6/showthread.php?t=100591 dimeter 51,5mm, focus129mm?

October 20th, 2007, 12:53 AM	#22
Daniel Apollon Regular Crew Join Date: Oct 2005 Location: Norway & France Posts: 50	Optical tapers Perhaps this optical taper could be of interest: http://incomusa.com/uploads/tapers_b...icial%26sa%3DN

October 12th, 2007, 09:57 AM	#17
Jon Wolding Regular Crew Join Date: Jan 2007 Location: Tampa, FL Posts: 195	How is this new adapter a "Purely Optical Adapter"? It uses a LSD screen (Light Shaping Diffuser). Interesting, but it should be in it's own thread.

October 12th, 2007, 02:00 PM	#18
Rich Hibner Major Player Join Date: Jan 2006 Posts: 218 Images: 1	Thanks for the link. I actually have been through dozens of LSD screens and found out that the screen from cell phones work the best and if you have a broken one lying around, it doesn't cost you anything. I have video of my LI-35 on a different thread. "How is this new adapter a "Purely Optical Adapter"? It uses a LSD screen (Light Shaping Diffuser). Interesting, but it should be in it's own thread." To clear up some confusion the 2video's you've seen on this particular thread had NO ground glass. It was exactly as described in the video and in my post. Igor had posted a screen grab from a thread that used Light Shaping Diffuser which I called "Li-35". I used the same spacers and achromats from my previous adapter for this. I can see where you think that this had used a LSD screen. The achromats were 51mm 129fl. I found him through another guy here on Dvinfo that posted his spinning DIY adapter.

October 13th, 2007, 10:50 PM	#19
Jon Wolding Regular Crew Join Date: Jan 2007 Location: Tampa, FL Posts: 195	How were you able to avoid CA with your all glass setup? I mean, JVC couldn't do it... what's your trick?

October 14th, 2007, 09:22 AM	#20
Igor Babic Regular Crew Join Date: Dec 2006 Location: Zagreb, Croatia Posts: 171	I have try it, but result is at least strange. Very hard to focus on moving objects. It is not so shallow DOF on objects that are over 1.5m away (It looks like something under 16mm camera, but you can tweak it in combination with both focus rings). FOV is different then on regular adapter because it depends of how low is f number. When you closing your lens apperture you actualy closing FOV. It shows some potential, and picture is bright and sharp. But this is not an 35mm adapter. More like some sort of macro. Interesting experiment.

October 14th, 2007, 01:25 PM	#21
Rich Hibner Major Player Join Date: Jan 2006 Posts: 218 Images: 1	Beats me. You see what I see. Igor's statement is pretty accurate. The dof is just under 16mm depending on distance.

October 21st, 2007, 12:32 AM	#23
Rich Hibner Major Player Join Date: Jan 2006 Posts: 218 Images: 1	that looks very interesting..how much does that go for? and how would you be able to calculate what mm you would need? where are the experts at?

February 8th, 2008, 10:39 AM	#25
Rich Hibner Major Player Join Date: Jan 2006 Posts: 218 Images: 1	should be public. just make sure to save as.