35mm Adapter Static Aldu35 - Page 4 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 January 27th, 2004, 07:01 PM   #46
Regular Crew
 
Join Date: Jan 2004
Location: Montreal Canada
Posts: 86
Simon

The problem is you canot only use a lens ,you need a pentaprism.

http://www.zygo.com/appnotes/zms0017/zms0017.pdf
Alain Dumais is offline   Reply With Quote
Old January 27th, 2004, 07:07 PM   #47
Regular Crew
 
Join Date: Dec 2003
Location: Canada
Posts: 94
ALDU 35 Video and Pictures

Posted Here:

http://www.moorefilms.com/aldu35.htm
Taylor Moore is offline   Reply With Quote
Old January 27th, 2004, 07:36 PM   #48
Regular Crew
 
Join Date: Jan 2004
Location: Montreal Canada
Posts: 86
Taylor Moore

Thank you Taylor
Now Image are available here
for Aldu35

http://www.moorefilms.com/aldu35.htm



Alain
http://www.kheops-tech.com/~ad3d/

Alain Dumais is offline   Reply With Quote
Old January 27th, 2004, 09:03 PM   #49
Major Player
 
Join Date: Aug 2003
Location: Poplarville, MS
Posts: 453
Noah: I ordered my aluminum oxide from Scientific Instrument Services, Inc
(http://www.sisweb.com/ms/sis/alumoxid.htm)


There's also another place called Ted Pella, Inc
(http://www.tedpella.com/material_html/grind.htm)


I went with SIS because they had the option to order a small (4oz) bottle. ($10.50 each)
Frank Ladner is offline   Reply With Quote
Old January 27th, 2004, 09:08 PM   #50
Regular Crew
 
Join Date: Sep 2003
Location: New York, NY
Posts: 64
Thanks, but the problem is that Scientific Intrument Services, Inc only sells 600 grit and the other place, Ted Pella, Inc only sells in larger, unnecesarry quantities and they don't sell in the larger 120 or so grit
__________________
Noah Posnick
http://www.posnick.com
Noah Posnick is offline   Reply With Quote
Old January 27th, 2004, 09:20 PM   #51
Major Player
 
Join Date: Aug 2003
Location: Poplarville, MS
Posts: 453
Noah: That's true. I asked the representative at SIS over the phone, and they only have 600 grit. I'm hoping to just use 600 grit, instead of using bigger sizes and moving down. I know this will be a lot of extra grinding, but I'm willing to give it a try.

If I need to, I'll get a 1lb container of 400 or 320 from Ted Pella.
Frank Ladner is offline   Reply With Quote
Old January 27th, 2004, 09:20 PM   #52
Regular Crew
 
Join Date: Jan 2004
Location: Montreal Canada
Posts: 86
Alluminium oxid

Try here this is where I buy it.

http://www.microid.com/maison.htm

I can't imagine you canot find this in New-York.
Alain Dumais is offline   Reply With Quote
Old January 27th, 2004, 09:26 PM   #53
Major Player
 
Join Date: Aug 2003
Location: Poplarville, MS
Posts: 453
Alain: It appears that your device is fixed to work with that specific 35mm lens. Have you thought about building one that is adjustable, to accomodate lenses with different flange focal lengths?
Frank Ladner is offline   Reply With Quote
Old January 27th, 2004, 09:26 PM   #54
New Boot
 
Join Date: Jan 2004
Location: Detroit, MI
Posts: 18
Alain--

Couple of things:

Could you post a close-up detail pic of the finished GG or is it "stuck?"

Do you think a electric grinder would work?:

http://www.amazon.com/exec/obidos/tg...&s=hi&n=228013

If so, they have grinding wheel attachments for this tool that comes in the lower grit aluminum oxide the project calls for. Perhaps this would cut down on some of the labor??
__________________
www.detroitfilms.com
Todd Birmingham is offline   Reply With Quote
Old January 27th, 2004, 09:42 PM   #55
New Boot
 
Join Date: Jan 2004
Location: Detroit, MI
Posts: 18
Here's another place I found 120 and 240 grit Aluminum Oxide:

http://www.caswellplating.com/buffs/aws750.htm

It's brown though. Is there a difference between brown and white?

1 pound is $3.50. Cheapest I've seen by far.
__________________
www.detroitfilms.com
Todd Birmingham is offline   Reply With Quote
Old January 27th, 2004, 10:07 PM   #56
Regular Crew
 
Join Date: Jan 2004
Location: Montreal Canada
Posts: 86
Todd

I really don't know.
I haven't try this . The guy's at the telescope store tell me that the glass for microscope that need really precise grinding or for there photographique need are Hand made. Maybe you can start whit this for the first step but the first step is the shortest one,
forget about that for the rest, (I think) So your not gone a save time but I tell you again it's not that hard.

When I was at the store ,and the guy's explaine me how to do it ,I was a bit sceptic but when I start doing it I can't stop until it's done.

Alain
Alain Dumais is offline   Reply With Quote
Old January 27th, 2004, 10:47 PM   #57
Regular Crew
 
Join Date: Jan 2004
Location: Montreal Canada
Posts: 86
Todd

----Could you post a close-up detail pic of the finished GG----

http://www.kheops-tech.com/~ad3d/Aldu35.jpg
Alain Dumais is offline   Reply With Quote
Old January 28th, 2004, 12:00 AM   #58
Major Player
 
Join Date: Dec 2003
Location: Anaheim, CA
Posts: 445
Heres a test chart for the optical quality of all of our mini35 designs. Any promising designs should be put to this test to know for sure that its working as well as it can.

It tests for:
1)chroma aberration
2)barrel distortion
3)how much grain is apparent from the ground glass

How does it work?

Step 1: Print out the picture of the test chart on high quality glossy photo paper at 300dpi. You'll find a link at:
http://www.cinematographerreels.com/mini35info.htm

Step 2: Measure the image after it prints out. It should measure 24mm x 18mm.

Step 3: Videotape the image with only the diopter lens your using in front of your camera (diopters are also known as macros, closeup filters, achromats and apochromats) and make sure its in focus and that you are filling the viewfinder edge to edge with the image.

Step 4: Post a frame grab from your video here at full resolution (720x480). If you have straight lines in your frame grab and no color blurring then your mini35 system has pasted the test.

Now if you want to check for how much grain can be seen in your ground glass repeat the first 4 steps with your mini35 system put all together including your 35mm lens.

These tests will check, with precision, everything but resolution. You'll need to shoot a professional resolution chart for that. Post that too if you have frame grabs.

Link to mini35 test chart:
http://www.cinematographerreels.com/mini35info.htm

Brett Erskine
Director of Photography
Premiere Visions
1761 W. La Palma Ave., Suite #302
Anaheim, CA 92801
www.CinematographerReels.com
BErskine@CinematographerReels.com
Brett Erskine is offline   Reply With Quote
Old January 28th, 2004, 12:57 AM   #59
Major Player
 
Join Date: Dec 2003
Location: Brooklyn, NY
Posts: 636
Any reason why the diffusers previously linked to won't work for this project? Aren't they just pre-ground glass?

Here's what I'm talking about...

Is it true that the grind, or frost, needs to measure in at 3 microns?

- jim
__________________
Realism, anyway, is never exactly the same as reality, and in the cinema it is of necessity faked. -- J-L G
Jim Lafferty is offline   Reply With Quote
Old January 28th, 2004, 01:03 AM   #60
Major Player
 
Join Date: Nov 2003
Location: cambridge ma
Posts: 247
flipping the image aldu35

http://www.partsexpress.com/pe/showd...ID=16106&DID=7

hi everyone wonder If this might be of help .
alain ...that is the most beautiful ground glass I have seen.
my test with the glass etching paste seems to cause what
look like pit,s and alain do you have a method for protecting the other side of the glass when you are grinding it. thanks for all the great photos
Richard Mellor 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 01:51 AM.


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