Homemade 35mm Adapter

Agus Casse · December 17th, 2003, 02:40 PM

I dont know which packs of cds will bring the already sanded disk, i just found it while i was looking something else in my room, but i call for a friend that buys tons and tons of cds in spindle and also had a few...

i only bought Imation, Samsung, and some other brand, so tried up those brands.

about the anamorphic adapter, well nope it wont work, you need some adapter that either replace the SLR lens, or put it in front.

I will try to put some pics of the new footage as soon as possible

Ernest Acosta · December 17th, 2003, 03:42 PM

This is an email that I received from the P&S people.

"Our Mini35Digital image converter works with anamorphic lenses. You can simply attach the lenses onto the converter and then you will be shooting in anamorphic. Good anamorphic lenses that we can recommend are the Elite lenses available from Slow Motion, USA"

I think there is a possibility that it might work. Theoretically if the anamorphic was the outer lens projecting into your main lens then the adapter would be projecting a squished image, which can be un-squished in post. The image size would be the same as if we didn't use the anamorphic. This is just my theory. Any additional input would be greatly appreciated.

Don Berube · December 17th, 2003, 04:05 PM

Geez, I hope this doesn't turn into a "Why are quality Anamorphic Lenses so expensive???" thread!

You would have to adapt the lens in front of the adaptor and relay lens with the anamorphic adaptor or use a full-on anamorphic len$. To clarify, everything needs to be done before the spinning glass image plane, unless you are using a cam with true 16:9 chips - but then you wouldn't have the need for an anamoprhic adaptor, unless you wanted "pseudo 2:35:1"

- don

Filip Kovcin · December 17th, 2003, 08:35 PM

hello there,

i think that usable GG can be cutted out from simple/single protective BOX for CDs/DVDs as used in rental video stores.
as i remember - you can find them also frosted.
(cannot check it rigth now in video rental - it's 3a.m. here in poland)

maybe i'm wrong, maybe the GG from the protective box is just too thick, but... - it's just a thought.

filip

Agus Casse · December 18th, 2003, 04:22 AM

Ok,

here are some news, for all the interested, i have decided to release a commercial version of the adapter, made with good hard material (alluminiun and plastic)

It will also include the support base with 15mm rods, using standards measures for compatibilty with other cine accesories, a matte box, and of course the adapter.

Now, i need some help here...

we are still working on flipping the image, seens like it is hard to find a solution, that will not raise the costs to high, cause listen to this... we want to sell the whole system for under 1k !!

Also we want to give compability for all kind of lenses, so you wont need to buy adaptors for each type of lenses, we will provide the pieces.

Ok,

so we need some creative ideas for flipping the image, and please we need some pictures of your cameras, Taylor sent us his pics of the DVX with complete measure of the lens. We need this info to give as most compability to all type of cameras as possible so you wont need to buy aditional items to make it work.

For XL users, let me tell ya it is a tricky camera, and we dont have one to try it up. but we will try also to give compability to it as well.

So,

please any ideas, post them here, and all images and size measures of your cameras please send them to agus@altoque.tv

Thanks for all your support, and we will be working our ass as hard as possible so we can bring the first version in January if possible at a very very low introducing price.

the whole system will be really cheap and the we guarantee 100% perfect picture with no vigneting at all.

BTW we shoot some new footage with a improved version which could be considered the BETA version (sorry no pics for now and video still rendering with film effects)

Kevin Maistros · December 18th, 2003, 04:26 AM

Very good news.

Bob Hart · December 18th, 2003, 06:01 AM

The Bolex H16 groundglass viewfinder path might be worth studying. Objective lens>>>90degree prism>>>groundglass(on one face of prism)>>>lens>>>90degree prism or mirror>>>eyepiece diopter>>>

It is however, a long path and on a 35mm scale might be unwieldy. With this method, the rotating groundglass disk would have to be mounted horizontally.

Emmanuel Decarpentrie · December 18th, 2003, 06:21 AM

Hi Agus (and everyone),

Wouldn't it be best to simply find a way to attach the camera upside-down? That way, you don't have to worry about adding new optical devices inside the AGUS35...

Congratulations for your ideas BTW.

Cheers,

Emmanuel

Jim Lafferty · December 18th, 2003, 06:39 AM

I think the best (i.e cheapest and most easily effective) way to flip the image would be to attach a mirror setup to a flipped LCD screen (in mirror mode).

- jim

Thomas Bruegger · December 18th, 2003, 07:22 AM

agus, thanks for the info.

about flipping the picture. i thought about turning the lcd display about 150 degrees just before the camera starts flipping the picture again. then put a mirror in front of the lcd and the picture should then only have the horizontal flip but is not upside down anymore and can be viewed when standing behind or beside the camera. the final flipping horizontal and vertical can then be made in post.

about camera measures: could you please post the camera models you allready have the measures of, so people dont send the same modelmeasurments again and again.

does anyone have a website where all the pictures and infos are collected?

does anyone know how many diopters the conversion lens must have to use the pd-150/vx-2000 with the agus35 i only own a +4 lens but that was not enough.

Thomas

Daniel Thornton · December 18th, 2003, 07:33 AM

I have been working on an Agus 35 and I have a little different design.
I used an old Nikon film camera and took some parts out of it. I noticed that the view finder had a small piece of rectangular frosted glass in it. I used this instead of a sanded spinning cd and found it to be easy to focus on and lets plenty of light in. I have a drawing of what I did if any one is interested. I am experimenting with the picture quality now.
I do not know what this rectangular piece of glass is but it makes a good picture for the video camera to zoom in on and focus.

Video Cam>>UVFilter>>short PVC pipe>>Nikon view finder Rectangular Lenses>>threaded PVC adapter>>short spacer>>Lenses Mounting Plate off old Nikon camera>>Sigma 35mm Lenses

All PVC pipe was 1 ½ in. The Nikon Rectangular Lenses fits into the pvc pipe allowing the Sigma 35mm lenses to focus on it.

Anhar Miah · December 18th, 2003, 08:06 AM

HI Agus, i've been following yourpost ever since the start,

Any way about flipping the image

Why not just add optics to the viewfinder you know the camcorders eyepiece and flip that part, that way there no need to turn the camcorder upside down and use any mirrors. OR connect an external LCD monitor (EG pocket TV') and turn that upside down.

I too have been trying to make my own version of MINI35 but using still GG, as spinning GG's take up lots of space.

Zac Stein · December 18th, 2003, 08:13 AM

well there is an optical way to flip the image.

Just use a concave lens, any half decent optometrist can make you one, the only thing is to know the correct size, anyone here know anything about physics and the best place to put the concave glass within the piece?

Zac

Peter Sciretta · December 18th, 2003, 09:02 AM

I'm currentlyworking on my third version of this adapter... I haven't installed the motor yet, but here is some pics

http://www.orfilms.com/adapter1.jpg

http://www.orfilms.com/adapter2.jpg

Chris Hurd · December 18th, 2003, 09:13 AM

Nice implementation, Peter! Really like the box. Is the cat a certified camera operator? Or just an assistant.

December 17th, 2003, 03:42 PM	#392
Ernest Acosta Regular Crew Join Date: Mar 2003 Location: New York Posts: 59	Mini-35 with Anamorphic This is an email that I received from the P&S people. "Our Mini35Digital image converter works with anamorphic lenses. You can simply attach the lenses onto the converter and then you will be shooting in anamorphic. Good anamorphic lenses that we can recommend are the Elite lenses available from Slow Motion, USA" I think there is a possibility that it might work. Theoretically if the anamorphic was the outer lens projecting into your main lens then the adapter would be projecting a squished image, which can be un-squished in post. The image size would be the same as if we didn't use the anamorphic. This is just my theory. Any additional input would be greatly appreciated.

December 17th, 2003, 04:05 PM	#393
Don Berube Moderator Join Date: Mar 2002 Location: Boston, MA (travel frequently) Posts: 837	Geez, I hope this doesn't turn into a "Why are quality Anamorphic Lenses so expensive???" thread! You would have to adapt the lens in front of the adaptor and relay lens with the anamorphic adaptor or use a full-on anamorphic len$. To clarify, everything needs to be done before the spinning glass image plane, unless you are using a cam with true 16:9 chips - but then you wouldn't have the need for an anamoprhic adaptor, unless you wanted "pseudo 2:35:1" - 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

December 17th, 2003, 08:35 PM	#394
Filip Kovcin Major Player Join Date: Dec 2003 Location: warsaw, poland Posts: 440	frosted fake CD - just a thought hello there, i think that usable GG can be cutted out from simple/single protective BOX for CDs/DVDs as used in rental video stores. as i remember - you can find them also frosted. (cannot check it rigth now in video rental - it's 3a.m. here in poland) maybe i'm wrong, maybe the GG from the protective box is just too thick, but... - it's just a thought. filip

December 18th, 2003, 09:13 AM	#405
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,368 Images: 513	Nice implementation, Peter! Really like the box. Is the cat a certified camera operator? Or just an assistant. __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

December 17th, 2003, 02:40 PM	#391
Agus Casse Major Player Join Date: Jul 2003 Location: Guatemala Posts: 322	I dont know which packs of cds will bring the already sanded disk, i just found it while i was looking something else in my room, but i call for a friend that buys tons and tons of cds in spindle and also had a few... i only bought Imation, Samsung, and some other brand, so tried up those brands. about the anamorphic adapter, well nope it wont work, you need some adapter that either replace the SLR lens, or put it in front. I will try to put some pics of the new footage as soon as possible

December 18th, 2003, 04:22 AM	#395
Agus Casse Major Player Join Date: Jul 2003 Location: Guatemala Posts: 322	Ok, here are some news, for all the interested, i have decided to release a commercial version of the adapter, made with good hard material (alluminiun and plastic) It will also include the support base with 15mm rods, using standards measures for compatibilty with other cine accesories, a matte box, and of course the adapter. Now, i need some help here... we are still working on flipping the image, seens like it is hard to find a solution, that will not raise the costs to high, cause listen to this... we want to sell the whole system for under 1k !! Also we want to give compability for all kind of lenses, so you wont need to buy adaptors for each type of lenses, we will provide the pieces. Ok, so we need some creative ideas for flipping the image, and please we need some pictures of your cameras, Taylor sent us his pics of the DVX with complete measure of the lens. We need this info to give as most compability to all type of cameras as possible so you wont need to buy aditional items to make it work. For XL users, let me tell ya it is a tricky camera, and we dont have one to try it up. but we will try also to give compability to it as well. So, please any ideas, post them here, and all images and size measures of your cameras please send them to agus@altoque.tv Thanks for all your support, and we will be working our ass as hard as possible so we can bring the first version in January if possible at a very very low introducing price. the whole system will be really cheap and the we guarantee 100% perfect picture with no vigneting at all. BTW we shoot some new footage with a improved version which could be considered the BETA version (sorry no pics for now and video still rendering with film effects)

December 18th, 2003, 04:26 AM	#396
Kevin Maistros Regular Crew Join Date: May 2003 Location: Cleveland, OH Posts: 129	Very good news.

December 18th, 2003, 06:01 AM	#397
Bob Hart Inner Circle Join Date: Dec 2003 Location: PERTH. W.A. AUSTRALIA. Posts: 4,477	The Bolex H16 groundglass viewfinder path might be worth studying. Objective lens>>>90degree prism>>>groundglass(on one face of prism)>>>lens>>>90degree prism or mirror>>>eyepiece diopter>>> It is however, a long path and on a 35mm scale might be unwieldy. With this method, the rotating groundglass disk would have to be mounted horizontally.

December 18th, 2003, 06:21 AM	#398
Emmanuel Decarpentrie New Boot Join Date: Dec 2003 Location: Belgium Posts: 9	Hi Agus (and everyone), Wouldn't it be best to simply find a way to attach the camera upside-down? That way, you don't have to worry about adding new optical devices inside the AGUS35... Congratulations for your ideas BTW. Cheers, Emmanuel

December 18th, 2003, 06:39 AM	#399
Jim Lafferty Major Player Join Date: Dec 2003 Location: Brooklyn, NY Posts: 636	I think the best (i.e cheapest and most easily effective) way to flip the image would be to attach a mirror setup to a flipped LCD screen (in mirror mode). - jim

December 18th, 2003, 07:22 AM	#400
Thomas Bruegger New Boot Join Date: Dec 2003 Location: switzerland Posts: 20	agus, thanks for the info. about flipping the picture. i thought about turning the lcd display about 150 degrees just before the camera starts flipping the picture again. then put a mirror in front of the lcd and the picture should then only have the horizontal flip but is not upside down anymore and can be viewed when standing behind or beside the camera. the final flipping horizontal and vertical can then be made in post. about camera measures: could you please post the camera models you allready have the measures of, so people dont send the same modelmeasurments again and again. does anyone have a website where all the pictures and infos are collected? does anyone know how many diopters the conversion lens must have to use the pd-150/vx-2000 with the agus35 i only own a +4 lens but that was not enough. Thomas

December 18th, 2003, 07:33 AM	#401
Daniel Thornton Regular Crew Join Date: Dec 2003 Posts: 43	I have been working on an Agus 35 and I have a little different design. I used an old Nikon film camera and took some parts out of it. I noticed that the view finder had a small piece of rectangular frosted glass in it. I used this instead of a sanded spinning cd and found it to be easy to focus on and lets plenty of light in. I have a drawing of what I did if any one is interested. I am experimenting with the picture quality now. I do not know what this rectangular piece of glass is but it makes a good picture for the video camera to zoom in on and focus. Video Cam>>UVFilter>>short PVC pipe>>Nikon view finder Rectangular Lenses>>threaded PVC adapter>>short spacer>>Lenses Mounting Plate off old Nikon camera>>Sigma 35mm Lenses All PVC pipe was 1 ½ in. The Nikon Rectangular Lenses fits into the pvc pipe allowing the Sigma 35mm lenses to focus on it.

December 18th, 2003, 08:06 AM	#402
Anhar Miah Major Player Join Date: Dec 2003 Location: United Kindom, England Posts: 290	HI Agus, i've been following yourpost ever since the start, Any way about flipping the image Why not just add optics to the viewfinder you know the camcorders eyepiece and flip that part, that way there no need to turn the camcorder upside down and use any mirrors. OR connect an external LCD monitor (EG pocket TV') and turn that upside down. I too have been trying to make my own version of MINI35 but using still GG, as spinning GG's take up lots of space.

December 18th, 2003, 08:13 AM	#403
Zac Stein Major Player Join Date: Aug 2002 Location: Melbourne, Australia Posts: 730	well there is an optical way to flip the image. Just use a concave lens, any half decent optometrist can make you one, the only thing is to know the correct size, anyone here know anything about physics and the best place to put the concave glass within the piece? Zac

December 18th, 2003, 09:02 AM	#404
Peter Sciretta Regular Crew Join Date: Nov 2003 Posts: 72	I'm currentlyworking on my third version of this adapter... I haven't installed the motor yet, but here is some pics http://www.orfilms.com/adapter1.jpg http://www.orfilms.com/adapter2.jpg