Lens Adapter for HD100 finished. at DVinfo.net

Ted Ramasola · March 14th, 2006, 12:41 PM

Guys,

Just want to share that I finished modifying the medium format lens adapter I made for my DVX and made it fit the HD100.

The results were great. I'll just finish attaching the battery housing and I'll post photos or footage.

1st observation is. compared when it was on the DVX, the HD footage from the JVC is much much better. The resolution and low noise quality of the HD100 helped in producing great images.

The problem of lens breathing when racking focus is solved when using a lens adapter.

The shallow DOF is an added "trick up your sleeve" when using this camera which is otherwise hard to achieve.

This adapter is the spinning GG type.

Wayne Kinney · March 14th, 2006, 01:49 PM

would love to see pictures and footage, well done!

Ted Ramasola · March 17th, 2006, 04:14 AM

Ok guys,

Here it is,

A pic of the HD100 and DIY DOF120 adapter
http://tedramasola.9k.com/images/hd100_n_dof120.jpg

HD100 and DOF120 mounted on a DIY mini Skater
http://tedramasola.9k.com/images/hd1...ywood_sktr.jpg

A frame grab.
http://tedramasola.9k.com/images/hddof120_frame-1.jpg

If you have problems with the link, go here;
http://tedramasola.9k.com/photo2.html

I have sample footage about 33mb in size, If anyone is interested, please tell me ideas where to post it.

Wayne Kinney · March 17th, 2006, 04:34 AM

very nice,

please tell us more about your setup, achromats, pcx's distances and such, always useful.

Ted Ramasola · March 17th, 2006, 04:56 AM

Wayne

The ingredients are, midformat lens > spinning "gg" > 2pcs stack of +4 closeup filter and 1pc +3 close up. > stock 16x lens.

The 3 close up lenses are all 67mm in diameter. I got an 82mm uv filter, removed the glass and used this as a 'holder' or 'step dwn' ring for the 67 mm close ups.
I poured marine epoxy between the 82 and 1 67mm close up.
I threaded the other 2 close ups BEHIND the 1st so when you thread it into the stock lens, the close ups are inside and really close to the first lens element of the stock lens. this avoids any fringe distortion on the image.

I hope I wrote it right..

I'll try to put a link to a construction diagram soon Wayne.

Wayne Kinney · March 17th, 2006, 05:44 AM

Good work, dont see many adapters coupled to the HD100.

Ted Ramasola · March 18th, 2006, 01:49 PM

I checked my camera settings and realized my mistake.
Nateweaver, in another thread pointed out the soft image.
The image I posted earlier was too soft because I lowered the detail settings.
Also, I didnt WB after changing to the lens adapter.

The following images were achieved with detail set to 1.
I used Paolo's true color scn file and Tim's gamma settings.

Here are new frame grabs.
from a 80mm:
http://tedramasola.9k.com/images/80mm.jpg

from a 45mm with the camera moved forward to achieve the same framing
of the subject:
http://tedramasola.9k.com/images/45mm.jpg

and without the adapter with the stock lens at full open.
http://tedramasola.9k.com/images/16xstock.jpg

To go to the web page with all the images click below;
http://tedramasola.9k.com/photo2.html

Keith Kline · March 18th, 2006, 02:29 PM

Looks really good. What type of medium format lenses are you using and how are they attached to the front of the adapter? What are you using for GG and motor?

Ted Ramasola · March 18th, 2006, 02:38 PM

Keith Kline,

Lenses; mamiya645 medium format, 80mm f1.9, 45mm f2.8
Lens attached using the rear lens cap, bolted and marine epoxied to the case.
Motor; 12v replacement motor for CD mechanism, underpowered with only 4.5v battery.
GG; "high tech" frosted CD 'FREE' with a particular brand of CD spindle.(I forgot, think it was maxell)

Francois Poitras · March 18th, 2006, 03:38 PM

Good job, Ted. I’m noticing some CA on the back of your hair (yellow) and at the fringe of your arm (blue). Introduced by the stack of close-up filters, probably. A suggestion: it might be worth it to try a reasonable quality achromat.

HTH,

Cole McDonald · March 18th, 2006, 04:10 PM

ton of recent experimenting: flip the outermost closeup filter so the thread is facing out. It seems to get the edges to snap back into alignment. Don't know the physics behind why, and don't really care...it cost me $.02 in electrical tape to attach the last filter backwards (or find a F-F adaptor for the filters).

David Delaney · March 19th, 2006, 12:58 PM

That looks great. I am really impressed with that footage. Nice job.

Ted Ramasola · March 11th, 2007, 06:31 AM

Heres some grabs from a commercial using this adapter.
This was shot at f 1.9

Charles Hurley · March 12th, 2007, 12:34 AM

The flange depth for mamiya 645 lenses is 63mm do you have infinity focus? What focal length are you using to hit the CD? This thing is shorter than most other 35mm adapters and with MF lenses no less. Nice work.

Ted Ramasola · March 12th, 2007, 05:25 AM

Charles,
Thats correct, the flange depth is 63mm depth.
Yeah, I do have infinite focus.
Among the 3 lenses I have for the adapter, the 45mm has the shortest MOD at 50 cm.
I positioned the GG in the same distance from the actual film plane so i get the same footprint as on the 120 negative.
You can even use the focus marks to get focus if need be.

Ted

March 14th, 2006, 12:41 PM	#1
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	Lens Adapter for HD100 finished. Guys, Just want to share that I finished modifying the medium format lens adapter I made for my DVX and made it fit the HD100. The results were great. I'll just finish attaching the battery housing and I'll post photos or footage. 1st observation is. compared when it was on the DVX, the HD footage from the JVC is much much better. The resolution and low noise quality of the HD100 helped in producing great images. The problem of lens breathing when racking focus is solved when using a lens adapter. The shallow DOF is an added "trick up your sleeve" when using this camera which is otherwise hard to achieve. This adapter is the spinning GG type.

March 14th, 2006, 01:49 PM	#2
Wayne Kinney Major Player Join Date: Jun 2005 Location: Brighton, East Sussex, UK Posts: 938	would love to see pictures and footage, well done! __________________ Thanks, Wayne.

March 17th, 2006, 04:14 AM	#3
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	Pics and grab of HD100 Lens adapter Ok guys, Here it is, A pic of the HD100 and DIY DOF120 adapter http://tedramasola.9k.com/images/hd100_n_dof120.jpg HD100 and DOF120 mounted on a DIY mini Skater http://tedramasola.9k.com/images/hd1...ywood_sktr.jpg A frame grab. http://tedramasola.9k.com/images/hddof120_frame-1.jpg If you have problems with the link, go here; http://tedramasola.9k.com/photo2.html I have sample footage about 33mb in size, If anyone is interested, please tell me ideas where to post it.

March 17th, 2006, 04:34 AM	#4
Wayne Kinney Major Player Join Date: Jun 2005 Location: Brighton, East Sussex, UK Posts: 938	very nice, please tell us more about your setup, achromats, pcx's distances and such, always useful. __________________ Thanks, Wayne.

March 17th, 2006, 05:44 AM	#6
Wayne Kinney Major Player Join Date: Jun 2005 Location: Brighton, East Sussex, UK Posts: 938	Good work, dont see many adapters coupled to the HD100. __________________ Thanks, Wayne.

March 17th, 2006, 04:56 AM	#5
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	Wayne The ingredients are, midformat lens > spinning "gg" > 2pcs stack of +4 closeup filter and 1pc +3 close up. > stock 16x lens. The 3 close up lenses are all 67mm in diameter. I got an 82mm uv filter, removed the glass and used this as a 'holder' or 'step dwn' ring for the 67 mm close ups. I poured marine epoxy between the 82 and 1 67mm close up. I threaded the other 2 close ups BEHIND the 1st so when you thread it into the stock lens, the close ups are inside and really close to the first lens element of the stock lens. this avoids any fringe distortion on the image. I hope I wrote it right.. I'll try to put a link to a construction diagram soon Wayne.

March 18th, 2006, 01:49 PM	#7
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	Better images from adapter I checked my camera settings and realized my mistake. Nateweaver, in another thread pointed out the soft image. The image I posted earlier was too soft because I lowered the detail settings. Also, I didnt WB after changing to the lens adapter. The following images were achieved with detail set to 1. I used Paolo's true color scn file and Tim's gamma settings. Here are new frame grabs. from a 80mm: http://tedramasola.9k.com/images/80mm.jpg from a 45mm with the camera moved forward to achieve the same framing of the subject: http://tedramasola.9k.com/images/45mm.jpg and without the adapter with the stock lens at full open. http://tedramasola.9k.com/images/16xstock.jpg To go to the web page with all the images click below; http://tedramasola.9k.com/photo2.html

March 18th, 2006, 02:29 PM	#8
Keith Kline Regular Crew Join Date: Aug 2004 Location: Akron, Ohio Posts: 153	Looks Good Looks really good. What type of medium format lenses are you using and how are they attached to the front of the adapter? What are you using for GG and motor?

March 18th, 2006, 02:38 PM	#9
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	Keith Kline, Lenses; mamiya645 medium format, 80mm f1.9, 45mm f2.8 Lens attached using the rear lens cap, bolted and marine epoxied to the case. Motor; 12v replacement motor for CD mechanism, underpowered with only 4.5v battery. GG; "high tech" frosted CD 'FREE' with a particular brand of CD spindle.(I forgot, think it was maxell) Last edited by Ted Ramasola; March 18th, 2006 at 03:23 PM.

March 18th, 2006, 03:38 PM	#10
Francois Poitras Regular Crew Join Date: Nov 2004 Location: Québec (Canada) Posts: 133	Good job, Ted. I’m noticing some CA on the back of your hair (yellow) and at the fringe of your arm (blue). Introduced by the stack of close-up filters, probably. A suggestion: it might be worth it to try a reasonable quality achromat. HTH, __________________ François

March 18th, 2006, 04:10 PM	#11
Cole McDonald Trustee Join Date: Nov 2005 Location: Sauk Rapids, MN, USA Posts: 1,675	ton of recent experimenting: flip the outermost closeup filter so the thread is facing out. It seems to get the edges to snap back into alignment. Don't know the physics behind why, and don't really care...it cost me $.02 in electrical tape to attach the last filter backwards (or find a F-F adaptor for the filters). __________________ Web Youtube Facebook

March 19th, 2006, 12:58 PM	#12
David Delaney Trustee Join Date: Feb 2006 Location: Niagara Ontario Canada Posts: 1,121	That looks great. I am really impressed with that footage. Nice job.

March 11th, 2007, 06:31 AM	#13
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	A commercial i shot with DIY lens adapter Heres some grabs from a commercial using this adapter. This was shot at f 1.9 Attached Thumbnails

March 12th, 2007, 12:34 AM	#14
Charles Hurley Regular Crew Join Date: Feb 2007 Location: Brooklyn NY Posts: 128	The flange depth for mamiya 645 lenses is 63mm do you have infinity focus? What focal length are you using to hit the CD? This thing is shorter than most other 35mm adapters and with MF lenses no less. Nice work.

March 12th, 2007, 05:25 AM	#15
Ted Ramasola Trustee Join Date: May 2005 Location: Allen, Texas U.S.A Posts: 1,117	Charles, Thats correct, the flange depth is 63mm depth. Yeah, I do have infinite focus. Among the 3 lenses I have for the adapter, the 45mm has the shortest MOD at 50 cm. I positioned the GG in the same distance from the actual film plane so i get the same footprint as on the 120 negative. You can even use the focus marks to get focus if need be. Ted