New moving ground glass mechanism - Page 29 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 June 1st, 2005, 05:26 PM   #421
Major Player
 
Join Date: Sep 2002
Location: US & THEM
Posts: 827
>I would still be curious if you could get same sharp image on Z1@ 2.8 and a larger CU lens (for the sake of knowing...)

I would surely doubt this. When I move a piece of paper into view across the 250D - it only becomes visible within about 20mm central diameter - this is because the FX1 has about 5 dgree FOV when zoomed in - a larger CU would be a waste of glass and money imho :)

>What is the power? +3,4,7?

the 250D is +4 dioptre, spectra coated about $90, and Canon do not recommend stacking more than one :( and if they did, maybe it would only be fully sharp at F!!
__________________
John Jay

Beware ***PLUGGER-BYTES***
John Jay is offline   Reply With Quote
Old June 1st, 2005, 05:38 PM   #422
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
Do you have it mounted on the lens or further away? 72mm dia?
Dan Diaconu is offline   Reply With Quote
Old June 1st, 2005, 05:57 PM   #423
Major Player
 
Join Date: Sep 2002
Location: US & THEM
Posts: 827
interesting question...

I am using FX1>72-58mm step ring>Canon 250D 58mm>58mm tube>>>>....


moving the dioptre further way from the FX1 will use more of the 250D glass and increase magnification. Have you found a sweet spot??
__________________
John Jay

Beware ***PLUGGER-BYTES***
John Jay is offline   Reply With Quote
Old June 1st, 2005, 07:02 PM   #424
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
Try a "hand-held" close to the lens (skip the 72-58) see what happens.
Dan Diaconu is offline   Reply With Quote
Old June 2nd, 2005, 10:18 AM   #425
Major Player
 
Join Date: Sep 2002
Location: US & THEM
Posts: 827
no specific advantage gained
__________________
John Jay

Beware ***PLUGGER-BYTES***
John Jay is offline   Reply With Quote
Old June 2nd, 2005, 10:50 AM   #426
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
If you could only get your hands on a 72mm Century (to test it only) you may notice a difference... (any local rental house/photo store has it?..)
Dan Diaconu is offline   Reply With Quote
Old June 2nd, 2005, 11:22 AM   #427
Major Player
 
Join Date: Sep 2002
Location: US & THEM
Posts: 827
in the SLR lens world the standard macro lens is the 100mm F4, I think that alone must be saying something. Most articles I have read suggest F5.6-F8 as the optimum for macro photography. CU filters are not regarded favourably in the SLR community.
__________________
John Jay

Beware ***PLUGGER-BYTES***
John Jay is offline   Reply With Quote
Old June 2nd, 2005, 01:11 PM   #428
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
Sorry for the diversion, but I added a new album: lens comparison
http://dandiaconu.com/gallery/album18
On the CU issue; I have used the CU achromat from Century with MPIC (in front of 1.4/50 Nikkor) and it seem fine. (eye CU). However, closer to "academic" would be macro lens/extension tubes/adapters/bellows.

Last edited by Dan Diaconu; June 3rd, 2005 at 12:42 PM.
Dan Diaconu is offline   Reply With Quote
Old June 8th, 2005, 02:43 PM   #429
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
Now.. that looks familiar...
http://dandiaconu.com/gallery/work-in-progress/IMGA0769
but wait.... she's-a-moving-a-round-a
http://dandiaconu.com/gallery/work-in-progress/IMGA0770
Well... wouldn't that be nice?...
http://dandiaconu.com/gallery/work-in-progress/IMGA0776
Dan Diaconu is offline   Reply With Quote
Old June 9th, 2005, 05:24 PM   #430
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
This local rental house
http://provisionvideo.com/features.htm
will show some changes in the nearest future:
http://provisionvideo.com/events.htm
Dan Diaconu is offline   Reply With Quote
Old June 9th, 2005, 05:42 PM   #431
Major Player
 
Join Date: Jul 2004
Location: Springfield, MO, USA
Posts: 389
So the unit is just for rental not purchase?
Gary McClurg is offline   Reply With Quote
Old June 9th, 2005, 11:25 PM   #432
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
No, you can order one unit just as well.
Dan Diaconu is offline   Reply With Quote
Old June 10th, 2005, 12:43 AM   #433
Major Player
 
Join Date: Jul 2004
Location: Phoenix, AZ - USA
Posts: 300
Quote:
Originally Posted by Dan Diaconu
No, you can order one unit just as well.
Do you know what the rental and purchase prices are?
Joel Aaron is offline   Reply With Quote
Old June 10th, 2005, 01:38 AM   #434
Major Player
 
Join Date: Dec 2004
Location: Vancouver, Canada
Posts: 804
I had the pleasure two days ago to sell the first MPIC and the first set of lenses (I geared and re greased) for 13K configured for both Z1 and DVX100A. I have also included (in kind) my FF(yes the one I have photograped on my site) and the CU achromat (I did not use) just for ECU (in front of the SLR lenses). When a larger production scale will commence, the price will drop a lot. The local rental rate (for now) is $450/day (all lens included) We might look into a more complete package (FF, filters, MB, etc) once we will get some FB. I also have in mind a short film out test (I am very curious...) DV, HD and then both with MPIC. (the only way to determine results imo).
I have to do it since the first FEATURE was confirmed and booked for Sept-Oct-Nov (six weeks)
More to come. Oh... BTW, my patent application for the ELECTRO-MAGNETIC DRIVE (the "new GG mmoving mechanism" which is now SIX MONTHS OLD without being replicated) was allowed. (I still have to do some changes in the drawings and... oh well.. minor stuff...) Hopefully, my first "misterious" customer will refrain from taking it apart and commencing production without a "dinner invitation"........
I made this PUBLIC ANNOUNCEMENT since I did not (till today) actually reveal any details about the movement.
This forum was my way to establish a "priority date" for the contraption and determine if is worth moving it forward.
Now... is this a public invitation to take it to production or what? Who am I going to meet in court with? Anyone? I would actually preffer to leave some "younger blood" look after production, sale, etc as I have some other "toys" to make. Anyone interested, use this forum's email as my personal email is "haunted"...... (I did not even received the "new posts",.... I had to check the forum......) better yet, call me.
Dan Diaconu is offline   Reply With Quote
Old June 10th, 2005, 08:26 AM   #435
Regular Crew
 
Join Date: Dec 2004
Location: Pittsburgh, PA
Posts: 135
Movement of Fresnel

Dan,
How is it that the image is not effected by the movement (even as slight as it is) of the fresnel focusing screen? if I move mine, the image moves with it. What I'm thinking is, if your movement is even as small as .36mm, that is still 1% of the width of the frame, seems like you'd get some kind of blur. But your freeze frames look good, so I was wondering what the limits of moving the fresnel are, and how they effect image quality.

I look through this thread and didnt see this question asked, but if you covered it before just direct me to that post.
Donnie Wagner 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 04:22 AM.


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