Homemade 35mm Adapter

Ernest Acosta · December 11th, 2003, 01:58 PM

If you can wait for shipping here is one

http://www.bestbuy.com/site/olspage....oryId=cat03058

Louis Grimaldo · December 11th, 2003, 02:09 PM

I have been getting all my materials together to build an Agus35 with a DVX100. I bought a 30 pack CD spindle but I am not sure where i should place the spinning CD. Would it be better to place it by the Camcorder lens or the SLR 50mm lens? Should you place the CD as close to the lens as possible?

Chris Black · December 11th, 2003, 02:17 PM

Ok folks ....i have some test video ...from a very very basic agus35. ......Let me just say that .....the video example is very poor quality. ....nothing at all like agus' videos. ....This is strickly a test.

www.elpez.com/agus35test.mpg

Here's what I did. ...I took a cardboard box ...cut a hole in each end ....stuck my vivitar lens in one end ...and the canon gl2 in the other end. ....i slit a hole in the top ....and stuck a sand papered clear CD in the top ....then i just shot some video. .......

A few notes

Lighting is definitely a problem ....As you can see ...it was very dark ...and I had the settings cranked up pretty high in the gl2

Another thing .....Agus recommened using 600 grit sandpaper ....I didnt have 600 ....so i used 150 .........as you can see it puts huge scratches in the CD ........Also .......as you can probably see ....the CD (ground glass) ...is not spinning. ....

Aaron ......I posted a question about the round bright spot .....I fixed that problem ..... ..I hadnt sanded the CD enough. ....I took the CD out ..sanded it some more ...and that ...essentially diffused the bright round light.

Hope i didnt offend Agus by constructing such a bad test agus35 ...

let me know if you have any questions or comments

chris.

John Gaspain · December 11th, 2003, 02:34 PM

<<<-- Originally posted by Louis Grimaldo : I have been getting all my materials together to build an Agus35 with a DVX100. I bought a 30 pack CD spindle but I am not sure where i should place the spinning CD. Would it be better to place it by the Camcorder lens or the SLR 50mm lens? Should you place the CD as close to the lens as possible? -->>>

it depends on your lens and camera, like mine is 1 3/4" away from the 50mm ans 3/4" away from the camera.

Just experiment untill you get a clear projection on the gg.

hehe...I guess I better let the cat out of the bag now- (mine is adjustable :) I will post some pics of my setup in a while.

J. Clayton Stansberry · December 11th, 2003, 03:14 PM

John,

Great freaking idea!!!!! Adjustable, perfect. I think I am going to lay off awhile, waiting for all beta tests to yeild the perfect final result. You guys are awesome!

Clay

Chris Black · December 11th, 2003, 05:00 PM

posing a thought ...and asking a question ....

isnt there some sort of material out there ...like wax paper .....that you could put in the place of the GG ........like ..the translucent screen in an SLR camera. ......that way ..you could have a clean enough image ..without having to spin the projection screen (ground glass)

my question is ......what percentage of the original picture ...(720 X 480) are you losing.......by zooming in to the image close enough to eliminate vignetting.

for exampe ...are you ending up with ....a 680 X 420 image?? ....

chris

Luke Andrews · December 11th, 2003, 05:34 PM

OK I'll take a stab

# 1 even a very pure frosted (Wax Paper) type substrate is going to have issues because your taking 24-30fps it going to look like your filming thru a screen because the grain will not change overtime, unlike film who's grain is organic like due to changing it's pattern every frame. at least thats my take on it.

and #2
your not losing any resolution because you have not hit the cameras CCD's yet they are going to take a 720X480 sample of what ever they see.

I'm working on my plans right now, I really look forward to seeing what everyone comes up with.

Luke

John Gaspain · December 11th, 2003, 05:43 PM

heres my version,

im still experimenting with having to zoom slightly. I think that I can get the camera closer to the gg.

the gg is adjustable by moving the fan frame along the guide bolts.

I have a fresnel lens 1/8" away from the gg mounted on guitar wire.

I am using a Sima wide angle lens that I got at Bestbuy for $30 then removed the WA lens portion leaving the macro in place, If I just move the cam 1/2" closer I have a great picture without zooming, but I dont have a good way to secure it properly so I left it alone for now.

I also noticed that the final image is very dark, I might need a lighter gg

http://www.imagestation.com/picture/...4/fa531005.jpg

http://www.imagestation.com/picture/...8/fa531004.jpg

http://www.imagestation.com/picture/...c/fa531009.jpg

http://www.imagestation.com/picture/...c/fa53082e.jpg

http://www.imagestation.com/picture/...8/fa528f0c.jpg

gaspain

Jon Yurek · December 11th, 2003, 06:19 PM

Interesting. VERY interesting. I may have to steal your idea of using the fan casing when I make mine. And is that a fresnel lens in the shot where the CD is off?

John Gaspain · December 11th, 2003, 06:35 PM

<<<-- Originally posted by Jon Yurek : Interesting. VERY interesting. I may have to steal your idea of using the fan casing when I make mine. And is that a fresnel lens in the shot where the CD is off? -->>>

ya thats the fresnel, im still unshure of the proper distance away from the GG, rit now its about 1/8" away (1/4" would be better)

Im pretty happy with using the fan. Its quiet and smooth. I used a part from an old DVD player to hold the CD, gluing that on center of the fan was a pain to get it centered. I also had to trim alot of plastic of the shroud with a mill so the GG wouldnt rub.

John Gaspain · December 11th, 2003, 06:38 PM

<<<-- Originally posted by John Gaspain : <<<-- Originally posted by Jon Yurek : Interesting. VERY interesting. I may have to steal your idea of using the fan casing when I make mine. And is that a fresnel lens in the shot where the CD is off? -->>>

ya thats the fresnel, im still unshure of the proper distance away from the GG, right now its about 1/8" away (1/4" would be better)

Im pretty happy with using the fan. Its quiet and smooth. I used a part from an old DVD player to hold the CD, gluing that on center of the fan was a pain to get it centered. I also had to trim alot of plastic of the shroud with a mill so the GG wouldnt rub. -->>>

Jim Lafferty · December 11th, 2003, 06:38 PM

Quote:

Originally posted by John Gaspain : heres my version,

im still experimenting with having to zoom slightly. I think that I can get the camera closer to the gg...

Very cool. I'm using that same box housing from Radio Shack, but my design isn't nearly as industrial.

For those of you using the CD motor -- I noticed my portable CD player uses two "AA" batteries. Would upping that to a 9v stress the wiring or motor itself?

Also...my latest trip to Home Depot had me looking over the sandpaper section. I've already used 150 on my GG, and 600 was nowhere in sight. Agus, and others who've experienced success with their design -- can we see close-up, clean shots of your GG?

- jim

Mike Perkin · December 11th, 2003, 07:29 PM

On my trip to HomeDepot the finest grit sandpaper I could find was 400 grit. It seemed to work well.
Mike

Bob Hart · December 11th, 2003, 07:41 PM

If not using sandblasted or chemically etched glass, I would be inclined to get hold of some 600 grade lapidary grit (silicon carbide), clamp two clear CD disks back to back with a firm seal around the inner hub and outer diameter edges, put a bunch of bearing balls into a gemstone tumbler barrel with the grit and water, turn it on and leave it to its own devices for a few hours.

As long as the two disks have not moved against each other or grit got in between them, you should end up with two clear disks with a translucent surface on one side and smooth on the other.

I would do only one pair in a barrel at a time as sliding edges will cause long scratches not short pitts.

Just a thought.

Peter Sciretta · December 11th, 2003, 07:44 PM

i am using 2 AAA batteries (1.5 volts each) on the cd motor and I think thats going too fast and making more noise then it should... not nearly as much as the radio shack kiddie motors but noticable noise... any suggestions?

BTW: What project box size you guys using?

December 11th, 2003, 01:58 PM	#271
Ernest Acosta Regular Crew Join Date: Mar 2003 Location: New York Posts: 59	BestBuy CD If you can wait for shipping here is one http://www.bestbuy.com/site/olspage....oryId=cat03058

December 11th, 2003, 02:34 PM	#274
John Gaspain Major Player Join Date: Oct 2003 Location: WA-USA Posts: 371	<<<-- Originally posted by Louis Grimaldo : I have been getting all my materials together to build an Agus35 with a DVX100. I bought a 30 pack CD spindle but I am not sure where i should place the spinning CD. Would it be better to place it by the Camcorder lens or the SLR 50mm lens? Should you place the CD as close to the lens as possible? -->>> it depends on your lens and camera, like mine is 1 3/4" away from the 50mm ans 3/4" away from the camera. Just experiment untill you get a clear projection on the gg. hehe...I guess I better let the cat out of the bag now- (mine is adjustable :) I will post some pics of my setup in a while. __________________ The glory of the World passes by.

December 11th, 2003, 03:14 PM	#275
J. Clayton Stansberry Major Player Join Date: Sep 2003 Location: Colorado Posts: 316	John, Great freaking idea!!!!! Adjustable, perfect. I think I am going to lay off awhile, waiting for all beta tests to yeild the perfect final result. You guys are awesome! Clay __________________ I understand everything about nothing.

December 11th, 2003, 05:43 PM	#278
John Gaspain Major Player Join Date: Oct 2003 Location: WA-USA Posts: 371	heres my version, im still experimenting with having to zoom slightly. I think that I can get the camera closer to the gg. the gg is adjustable by moving the fan frame along the guide bolts. I have a fresnel lens 1/8" away from the gg mounted on guitar wire. I am using a Sima wide angle lens that I got at Bestbuy for $30 then removed the WA lens portion leaving the macro in place, If I just move the cam 1/2" closer I have a great picture without zooming, but I dont have a good way to secure it properly so I left it alone for now. I also noticed that the final image is very dark, I might need a lighter gg http://www.imagestation.com/picture/...4/fa531005.jpg http://www.imagestation.com/picture/...8/fa531004.jpg http://www.imagestation.com/picture/...c/fa531009.jpg http://www.imagestation.com/picture/...c/fa53082e.jpg http://www.imagestation.com/picture/...8/fa528f0c.jpg gaspain __________________ The glory of the World passes by.

December 11th, 2003, 06:35 PM	#280
John Gaspain Major Player Join Date: Oct 2003 Location: WA-USA Posts: 371	<<<-- Originally posted by Jon Yurek : Interesting. VERY interesting. I may have to steal your idea of using the fan casing when I make mine. And is that a fresnel lens in the shot where the CD is off? -->>> ya thats the fresnel, im still unshure of the proper distance away from the GG, rit now its about 1/8" away (1/4" would be better) Im pretty happy with using the fan. Its quiet and smooth. I used a part from an old DVD player to hold the CD, gluing that on center of the fan was a pain to get it centered. I also had to trim alot of plastic of the shroud with a mill so the GG wouldnt rub. __________________ The glory of the World passes by.

December 11th, 2003, 02:09 PM	#272
Louis Grimaldo Regular Crew Join Date: Oct 2003 Location: Tampa Posts: 26	I have been getting all my materials together to build an Agus35 with a DVX100. I bought a 30 pack CD spindle but I am not sure where i should place the spinning CD. Would it be better to place it by the Camcorder lens or the SLR 50mm lens? Should you place the CD as close to the lens as possible?

December 11th, 2003, 02:17 PM	#273
Chris Black New Boot Join Date: Dec 2003 Location: Corpus Christi texas Posts: 14	Ok folks ....i have some test video ...from a very very basic agus35. ......Let me just say that .....the video example is very poor quality. ....nothing at all like agus' videos. ....This is strickly a test. www.elpez.com/agus35test.mpg Here's what I did. ...I took a cardboard box ...cut a hole in each end ....stuck my vivitar lens in one end ...and the canon gl2 in the other end. ....i slit a hole in the top ....and stuck a sand papered clear CD in the top ....then i just shot some video. ....... A few notes Lighting is definitely a problem ....As you can see ...it was very dark ...and I had the settings cranked up pretty high in the gl2 Another thing .....Agus recommened using 600 grit sandpaper ....I didnt have 600 ....so i used 150 .........as you can see it puts huge scratches in the CD ........Also .......as you can probably see ....the CD (ground glass) ...is not spinning. .... Aaron ......I posted a question about the round bright spot .....I fixed that problem ..... ..I hadnt sanded the CD enough. ....I took the CD out ..sanded it some more ...and that ...essentially diffused the bright round light. Hope i didnt offend Agus by constructing such a bad test agus35 ... let me know if you have any questions or comments chris.

December 11th, 2003, 05:00 PM	#276
Chris Black New Boot Join Date: Dec 2003 Location: Corpus Christi texas Posts: 14	posing a thought ...and asking a question .... isnt there some sort of material out there ...like wax paper .....that you could put in the place of the GG ........like ..the translucent screen in an SLR camera. ......that way ..you could have a clean enough image ..without having to spin the projection screen (ground glass) my question is ......what percentage of the original picture ...(720 X 480) are you losing.......by zooming in to the image close enough to eliminate vignetting. for exampe ...are you ending up with ....a 680 X 420 image?? .... chris

December 11th, 2003, 05:34 PM	#277
Luke Andrews New Boot Join Date: Jun 2003 Location: Medina, OH Posts: 13	OK I'll take a stab # 1 even a very pure frosted (Wax Paper) type substrate is going to have issues because your taking 24-30fps it going to look like your filming thru a screen because the grain will not change overtime, unlike film who's grain is organic like due to changing it's pattern every frame. at least thats my take on it. and #2 your not losing any resolution because you have not hit the cameras CCD's yet they are going to take a 720X480 sample of what ever they see. I'm working on my plans right now, I really look forward to seeing what everyone comes up with. Luke

December 11th, 2003, 06:19 PM	#279
Jon Yurek Regular Crew Join Date: Sep 2003 Location: Worcester, MA Posts: 64	Interesting. VERY interesting. I may have to steal your idea of using the fan casing when I make mine. And is that a fresnel lens in the shot where the CD is off?

December 11th, 2003, 06:38 PM	#281
John Gaspain Major Player Join Date: Oct 2003 Location: WA-USA Posts: 371	<<<-- Originally posted by John Gaspain : <<<-- Originally posted by Jon Yurek : Interesting. VERY interesting. I may have to steal your idea of using the fan casing when I make mine. And is that a fresnel lens in the shot where the CD is off? -->>> ya thats the fresnel, im still unshure of the proper distance away from the GG, right now its about 1/8" away (1/4" would be better) Im pretty happy with using the fan. Its quiet and smooth. I used a part from an old DVD player to hold the CD, gluing that on center of the fan was a pain to get it centered. I also had to trim alot of plastic of the shroud with a mill so the GG wouldnt rub. -->>> __________________ The glory of the World passes by.

December 11th, 2003, 07:29 PM	#283
Mike Perkin New Boot Join Date: Dec 2003 Location: emmaus pennslyvania Posts: 10	On my trip to HomeDepot the finest grit sandpaper I could find was 400 grit. It seemed to work well. Mike

December 11th, 2003, 07:41 PM	#284
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,477	If not using sandblasted or chemically etched glass, I would be inclined to get hold of some 600 grade lapidary grit (silicon carbide), clamp two clear CD disks back to back with a firm seal around the inner hub and outer diameter edges, put a bunch of bearing balls into a gemstone tumbler barrel with the grit and water, turn it on and leave it to its own devices for a few hours. As long as the two disks have not moved against each other or grit got in between them, you should end up with two clear disks with a translucent surface on one side and smooth on the other. I would do only one pair in a barrel at a time as sliding edges will cause long scratches not short pitts. Just a thought.

December 11th, 2003, 07:44 PM	#285
Peter Sciretta Regular Crew Join Date: Nov 2003 Posts: 72	i am using 2 AAA batteries (1.5 volts each) on the cd motor and I think thats going too fast and making more noise then it should... not nearly as much as the radio shack kiddie motors but noticable noise... any suggestions? BTW: What project box size you guys using?