New moving ground glass mechanism

John Jay · June 1st, 2005, 04:26 PM

>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!!

Dan Diaconu · June 1st, 2005, 04:38 PM

Do you have it mounted on the lens or further away? 72mm dia?

John Jay · June 1st, 2005, 04:57 PM

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??

Dan Diaconu · June 1st, 2005, 06:02 PM

Try a "hand-held" close to the lens (skip the 72-58) see what happens.

John Jay · June 2nd, 2005, 09:18 AM

no specific advantage gained

Dan Diaconu · June 2nd, 2005, 09:50 AM

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?..)

John Jay · June 2nd, 2005, 10:22 AM

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.

Dan Diaconu · June 2nd, 2005, 12:11 PM

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.

Dan Diaconu · June 8th, 2005, 01:43 PM

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 · June 9th, 2005, 04:24 PM

This local rental house
http://provisionvideo.com/features.htm
will show some changes in the nearest future:
http://provisionvideo.com/events.htm

Gary McClurg · June 9th, 2005, 04:42 PM

So the unit is just for rental not purchase?

Dan Diaconu · June 9th, 2005, 10:25 PM

No, you can order one unit just as well.

Joel Aaron · June 9th, 2005, 11:43 PM

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?

Dan Diaconu · June 10th, 2005, 12:38 AM

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.

Donnie Wagner · June 10th, 2005, 07:26 AM

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.

June 1st, 2005, 04:26 PM	#421
John Jay 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*

June 1st, 2005, 04:57 PM	#423
John Jay 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*

June 2nd, 2005, 09:18 AM	#425
John Jay Major Player Join Date: Sep 2002 Location: US & THEM Posts: 827	no specific advantage gained __________________ John Jay Beware *PLUGGER-BYTES*

June 2nd, 2005, 10:22 AM	#427
John Jay 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*

June 2nd, 2005, 12:11 PM	#428
Dan Diaconu 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 11:42 AM.

June 1st, 2005, 04:38 PM	#422
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	Do you have it mounted on the lens or further away? 72mm dia?

June 1st, 2005, 06:02 PM	#424
Dan Diaconu 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.

June 2nd, 2005, 09:50 AM	#426
Dan Diaconu 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?..)

June 8th, 2005, 01:43 PM	#429
Dan Diaconu 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

June 9th, 2005, 04:24 PM	#430
Dan Diaconu 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

June 9th, 2005, 04:42 PM	#431
Gary McClurg Major Player Join Date: Jul 2004 Location: Springfield, MO, USA Posts: 389	So the unit is just for rental not purchase?

June 9th, 2005, 10:25 PM	#432
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	No, you can order one unit just as well.

June 10th, 2005, 12:38 AM	#434
Dan Diaconu 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.

June 10th, 2005, 07:26 AM	#435
Donnie Wagner 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.