Homemade 35mm Adapter - Page 35 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 December 21st, 2003, 11:18 PM   #511
Regular Crew
 
Join Date: Dec 2003
Location: Hot Springs, AR
Posts: 31
No Moving Parts

Hey, I tried to post this yesterday, but I may have found a way to not have to use a spinning CD. I had to scrap the spinning CD because of the size of my camcorder (which made it virtually impossible for me to have a spinning cd). The non moving method has no scratches, dust, etc. The image is bright too.

I used very thin, slightly diffused plastic and if i triple the layers it becomes diffused enough to create the projection. Worked for me. I was using other still pieces and the scratches from the sandpaper were just too noticeable. I knew there had to be an alternative. I'm not sure how it compares to the spinning CD, but it works for me.
Corey Smith is offline   Reply With Quote
Old December 21st, 2003, 11:19 PM   #512
Major Player
 
Join Date: Sep 2003
Location: Colorado
Posts: 316
Yeah, you need to zoom or magnify it. If you are zoomed in as far as possible, then you need to magnify it before you capture it. I have had problems with the vignetting, but that was due to my holes being off and not totally centered. I was able to zoom in a little more and that fixed the problem...this is just with the lens going straight into the camera without the frosted glass. Haven't got my hands on the sandpaper yet. Hope it works!
__________________
I understand everything about nothing.
J. Clayton Stansberry is offline   Reply With Quote
Old December 21st, 2003, 11:20 PM   #513
Regular Crew
 
Join Date: Dec 2003
Location: Canada
Posts: 94
Hey Corey,
Can you post some pix?
Taylor Moore is offline   Reply With Quote
Old December 21st, 2003, 11:22 PM   #514
Major Player
 
Join Date: Sep 2003
Location: Colorado
Posts: 316
Corey,

What is this plastic you are talking about? And, where did you pick it up...as stated, I am waiting for the frosted CD, frosted plastic, etc. to complete generation 2 of the Agus35. Let us know ASAP! Thanks in advance...

Clay
__________________
I understand everything about nothing.
J. Clayton Stansberry is offline   Reply With Quote
Old December 22nd, 2003, 01:34 AM   #515
Major Player
 
Join Date: Dec 2003
Location: Newberg, Oregon
Posts: 440
Canon FD Lens question

This may seem like a dumb question to some, but after some browsing, I couldn't find an answer.

On a canon FD lens, how do you open the iris? Does the lens have to be attached to a camera?

I turn the aperture adjustment ring and it clicks, but the iris doesn't budge. Do I have to hold one of the pins on the back of the lens and then turn it or what?

Here is a picture of the lens:
http://www.canonfd.com/lenswork/lenswork010.htm

Thanks in advance

Spass
Jeremiah Rickert is offline   Reply With Quote
Old December 22nd, 2003, 01:58 AM   #516
Moderator
 
Join Date: Mar 2002
Location: Boston, MA (travel frequently)
Posts: 837
Jeremiah (or is it "Spass"?),

Sounds like the silver locking ring collar on the back of the lens is locked into "lens detached" position.

If you are looking at the back of the FD lens:
1) Press down on the tiny Positioning Pin closest to the Red Dot on the outer back ring.
2) Move rear locking collar fully counter-clockwise.
3) Swing the rear "Automatic aperture lever to the right until it clicks into position.

You will now be able to open and close the iris by moving the iris control ring on the lens. Note that as you move the iris ring, the rear "Aperture signal lever" will move to a new position, depending on what you set the iris control ring to.

- don
__________________
DONALD BERUBE - noisybrain. Productions, LLC
Director Of Photography/ Producer/ Consultant
http://noisybrain.com/donbio.html
CREATE and NETWORK with http://www.bosfcpug.org
and also http://fcpugnetwork.org
Don Berube is offline   Reply With Quote
Old December 22nd, 2003, 02:23 AM   #517
Moderator
 
Join Date: Mar 2002
Location: Boston, MA (travel frequently)
Posts: 837
Low Light Performance of Agus35 ???

I'm surprised that no one has yet asked that classic inevitable question: How does the Agus35 compare to the Vendi35 in terms of Low Light performace? >joke<

Well,,, I guess you could possibly mount a Lomo Night Vision scope to your adaptor,,, ;-)
http://www.opticsplanet.net/nightvision.html

- don
__________________
DONALD BERUBE - noisybrain. Productions, LLC
Director Of Photography/ Producer/ Consultant
http://noisybrain.com/donbio.html
CREATE and NETWORK with http://www.bosfcpug.org
and also http://fcpugnetwork.org
Don Berube is offline   Reply With Quote
Old December 22nd, 2003, 03:07 AM   #518
Vendible Book
 
Join Date: Dec 2003
Posts: 59
Don, that's a good one. Actually I think Agus's last video looks really good. However, it's an outdoor shooting, lighting is much more abundant in that case. I have yet to see anyone that can handle in door lighting well.

It should be noted that the video I shoot was shooting directly from the GG without any cover and was not modified or color corrected in anyway. I'm sure it will look brighter when everything is in a blackbox. But I'm not expecting dramatic improvement from this type of GG (hint, hint).

In fact I am wondering how good the mini35 is, considering there really isn't that much light passing through the lens. I don't believe there is any magic that somehow they can "squeeze" more light from how much there actually is. Again, it probably works well outdoor with bright sun light. I haven't seen any "bright" indoor shots on their web site (most are dark and smoky).

Having played with different kinds of real ground glass, I can tell you that the best/finest ground glass can only produce ok results in a static solution. However, there are other materials can do much better job, both transmitting more light and produce clearer image, but also cost a lot more. Let science do the magic, that's what I'm going to test next. I might even impress myself.
Louis Feng is offline   Reply With Quote
Old December 22nd, 2003, 03:23 AM   #519
Vendible Book
 
Join Date: Dec 2003
Posts: 59
Regarding using ground glass/plastic/consumer products

All the materials above will work fine with a rotating/vibrating solution. The downside is they scatter too much light in every direction. They are not specially made for this video recording.

A static solution is even harder. Ground glass won't work, plastic CD won't work, any short of consumer product won't work. They all produce uneven illumination or visible noise.

I am only considering a static solution for myself, because it would be much more cumbersome to produce an upright image with the rotating/vibrating solution. The missing part right now is to find the best material for the projection. I might have found what I need. I'll know in a few days.
Louis Feng is offline   Reply With Quote
Old December 22nd, 2003, 03:31 AM   #520
Regular Crew
 
Join Date: Dec 2003
Location: Hot Springs, AR
Posts: 31
It's called...

Plastic Sheeting. It's real cheap. 3-4 layers should be enough. Works pretty good. It doesn't need to be rotated, because it's not all scratched up. I'm not sure how it compares to the CD though. I will see if I can get some photos or videos up later. I'm still having some vignetting issues.
Corey Smith is offline   Reply With Quote
Old December 22nd, 2003, 03:33 AM   #521
Major Player
 
Join Date: Aug 2002
Location: Melbourne, Australia
Posts: 730
Vendible Book,

i noticed some plans you posted earlier, but they don't make much sense and the picture is a bit small to study properly, is there anyway you could label what goes in and where from a few different angles, with bigger pictures so i can see how it is working?

Thankyou,

zac
Zac Stein is offline   Reply With Quote
Old December 22nd, 2003, 03:34 AM   #522
Inner Circle
 
Join Date: Dec 2003
Location: PERTH. W.A. AUSTRALIA.
Posts: 4,356
If people want to go the non-moving groundglass route, then medium format objective lenses onto a larger fixed forsted glass might be the way to go., ie., bigger format bigger groundglass, smaller grain defects across the image.

It may be feasable to use the whole of a secondhand medium format camera or modify it to mount the small camcorder.
Bob Hart is offline   Reply With Quote
Old December 22nd, 2003, 10:09 AM   #523
Major Player
 
Join Date: Dec 2003
Location: Brooklyn, NY
Posts: 636
Quote:
Originally posted by Agus Casse:

hey Jim, thanks for that credit dude !!

i see that you are having some vibration problems, are you using a cd motor ? did you sanded the cd or was a already frosted one ?
Re: the credit -- of course, man!

Re: the shaking image -- that's a design problem that will be overcome when I build and mount my rail system. For the moment, the adapter is "free-standing," attached to the front of my GL1 with a piece of rubber coupling and an adjustable metal strip that tightens around the lens housing. While the weight is nice and it keeps the adapter tight to the front of the camera, the rubber has enough give as to shake when I make any adjustments to the film lens...

Any tips on where you got the parts for your rail setup? I really like the curved handle you put in place...but the overall design is nicely simple and effective.

- 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 December 22nd, 2003, 10:49 AM   #524
Major Player
 
Join Date: Mar 2003
Location: sweden
Posts: 795
Hey Jim, do you have some pics to share? I too have a xm2 and would like to see your setup being that we have the same camera. Thanks
__________________
Charles
'What we perceive to be may not be what we believe to be.'
Charles King is offline   Reply With Quote
Old December 22nd, 2003, 10:50 AM   #525
Major Player
 
Join Date: Jul 2003
Location: Guatemala
Posts: 322
Perhaps we should separate this thread to continue the progress about the agus35, and make a new one for the new vendi35
__________________
Agus35 - the ultimate tool for indie DV filmakers -
Agus Casse 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 09:50 AM.


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