Lens Adapter for HD100 finished. 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 March 14th, 2006, 12:41 PM   #1
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.
Ted Ramasola is offline   Reply With Quote
Old March 14th, 2006, 01:49 PM   #2
Major Player
 
Join Date: Jun 2005
Location: Brighton, East Sussex, UK
Posts: 938
would love to see pictures and footage, well done!
__________________
Thanks,
Wayne.
Wayne Kinney is offline   Reply With Quote
Old March 17th, 2006, 04:14 AM   #3
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.
Ted Ramasola is offline   Reply With Quote
Old March 17th, 2006, 04:34 AM   #4
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.
Wayne Kinney is offline   Reply With Quote
Old March 17th, 2006, 04:56 AM   #5
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.
Ted Ramasola is offline   Reply With Quote
Old March 17th, 2006, 05:44 AM   #6
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.
Wayne Kinney is offline   Reply With Quote
Old March 18th, 2006, 01:49 PM   #7
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
Ted Ramasola is offline   Reply With Quote
Old March 18th, 2006, 02:29 PM   #8
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?
Keith Kline is offline   Reply With Quote
Old March 18th, 2006, 02:38 PM   #9
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.
Ted Ramasola is offline   Reply With Quote
Old March 18th, 2006, 03:38 PM   #10
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
Francois Poitras is offline   Reply With Quote
Old March 18th, 2006, 04:10 PM   #11
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
Cole McDonald is offline   Reply With Quote
Old March 19th, 2006, 12:58 PM   #12
Trustee
 
Join Date: Feb 2006
Location: Niagara Ontario Canada
Posts: 1,121
That looks great. I am really impressed with that footage. Nice job.
David Delaney is offline   Reply With Quote
Old March 11th, 2007, 07:31 AM   #13
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
Lens Adapter for HD100 finished.-music-store1.jpg   Lens Adapter for HD100 finished.-pizzaparlor.jpg  

Lens Adapter for HD100 finished.-bookstore1.jpg   Lens Adapter for HD100 finished.-coffeeshop.jpg  

Ted Ramasola is offline   Reply With Quote
Old March 12th, 2007, 01:34 AM   #14
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.
Charles Hurley is offline   Reply With Quote
Old March 12th, 2007, 06:25 AM   #15
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
Ted Ramasola 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 11:59 PM.


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