Hey guys, I don't have the resources to build a 35mm adapter. So I am looking to buy one. I have a GL2.

If no one does, can someone point me in the right direction for building? I looked for a straight "tutorial" but I can't find a solid one for GL2? also recommendations on what macro lens to buy for this? Thanks.

I'm putting together a kit for people that don't want to build them. You can check out the first prototype here:

http://www.dvxuser.com/cgi-bin/DVX2/YaBB.pl?board=Links;action=display;num=1097454631

I have my old tutorial over here (http://ideaspora.net/oldskool), but will be updating it soon, so it's not officially linked from my mainpage yet. This is for the GL-1, but should work the same for the GL-2 -- they've got the same lens dimensions, I believe.

Good luck!

- jim

James,

Can you demonstrate what a pan looks like with your setup? If you're short on space, I'll host the file for a bit...

- jim

Here is a link to a pan i'd done a while back. I had a shakey lens on it. Sorry about the compression or the lack of...

http://www.sunrushmusic.com/mini35_pan.wmv

No need for the compression apology, I'm posting full res NTSC DV on my sight :D Each 25 second clip is about 50mb!

'sides, you need "uncompressed" video to see the true performance of a given setup, so the higher res the better.

- jim

hi everyone I don,t mean to rain on the parade . but the static adapter is realy easy and cheap to make. the parts list . a c -mount adapter $35. 5 empty filter rings $4 each .plcx $22.
ground glass diffuser 1500 grit $14.cannon 1.4 50mm $60

and that's not a hot spot in the link. it realy is the light on the wall

http://www.dvinfo.net/media/mellor/35%20mm%20lens%20test%202.jpg

http://www.dvinfo.net/media/mellor/35%20mm%20lens%20test.jpg


and james your setup looks realy cool.

Richard,

Things are dry around here -- and you're late for the parade :D

Where's the footage from your adapter? Can we see a 720x480, 30fps NTSC DV pan? This is the litmus test -- my adapter, made with specs similar to what you describe shows grain, especially in the highlights (see my old tutorial (http://ideaspora.net/oldskool), which has 1000 grit AO, my latest uses WAO5).

For NTSC viewing, web content -- i.e. output with even mild compression -- the WAO5 gg adapters are more than adequate. For projected material, the solution falls a bit short...

- jim

hi jim did you ever try to use 1500 grit ground glass from a optical company. this is a link. the 2inch round glass will fit perfectly in a 52mm lens filter


http://www.thorlabs.com/ProductDetail.cfm?&DID=6&ObjectGroup_ID=1132&Product_ID=36117




the next step is to build the next one in this tube. looks more professional ,and with adjustable rings you can get the focal distance from the lens to the ground glass perfect. someone somewere pointed out this can,t vary 1mm or we will lose sharpness


http://www.thorlabs.com/ProductDetail.cfm?DID=6&ObjectGroup_ID=213&Product_ID=1481

If I'm not mistaken, 1500 grit and WAO5 are the same, and if not -- I'm given the impression that WAO5 is finer. Otherwise, there's 3 micron grit around, but as I understand this acts more as a polish than an effective abbrasive.

At any rate, the proof's in the footage.

- jim

hi everyone I think this movie was made with a static adapter

life against memory


www.triggerstreet.com.

Richard could you perhaps label the pieces in the photo you provided? I'm interested in how you put the thing together (specifically I'm looking to maybe adapt the design for a DVX...)

I just ordered the parts if you want to save money you can wait untill i build this. the3 parts are sm2l20 ( 2 inch tube $29
sm2rr (2) @ $9.
I haVe a 50mm plcx and i will be getting the 1500 grit ground glass $14 the system starts with cannon lens next c mount next tube fit the ground glass untill sharp focus plcx last .tighten down with sm2rr inner ring . heck this is laser stuff it,s made to be precise . I am just shy of sharp focus with the filter rings model
I will say this I have tried every homemade ground glass all grit s and the ground glass from optmo sigma was by far the best yet.
I cracked the ground glass and will now be trying thorlabs 1500 ground glass it,s even cheaper than optmosigma let you know how it looks next week sent chris a few stills will link to them when they show up
this is the inner retaing ring. it can be threaded to any focal length. click links to stackable tubes of varing lengths
http://www.thorlabs.com/ProductDetail.cfm?DID=6&ObjectGroup_ID=848&Product_ID=1483

I will say this I have tried every homemade ground glass all grit s and the ground glass from optmo sigma was by far the best yet.

As I've said, footage is still the litmus test. "By far" the best you say -- I'd like to see for myself how it stacks up in a full res pan. Is the grain visible at all?

When you get it together, if you need a place to host the file, I'll do it -- make it a 30 second NTSC DV pan in daylight, across various light/dark/vertical/horizontal objects...

- jim

<<<-- Originally posted by Richard Mellor : hi everyone I think this movie was made with a static adapter

life against memory


www.triggerstreet.com. -->>>

Here's a good look at the set up they used

http://www.enormousapparatus.com/35adapter.htm

Forgive my lack of knowledge but what is the plano-convex lens for? And if I understand you correctly you are placing it AFTER the GG (ie between the GG and camera)?

hi everyone the adapter that james web made and mine are about the same. I think he used two condenser lens if you can find a 50mm plcx with a focal length as close to 50mm you will only need one. mine was something like a60mm fl and I don't know what he used for ground glass. but I would say the adapter I built equals or betters the setup used in the movie . life against memory. I am looking foward to see the quality of the thorlabs 1500 grit ground glass. and building all of this in the stackable lens tubes. from the advice of others the plcx needs to be as close to 50mm fl length and it needs to fit right on top of the ground glass my filter ring set up won,t allow me to get the lens perfect. about 1 or 2 mm above the ground glass. my hope is the stackable will allow the lens to fit directly on the ground glass and also fine tune the exact distance needed from the cannon 50mm and the focal plane of the ground glass I am starting to
learn after my fifth device. that all of this must be able to maintain tolerences of less than 1mm. after all we are trying to build a camera lens

this is link to optmo sigma ground glass

http://www.optosigma.com/miva/merchant.mv?Screen=PROD&Store_Code=OS&Product_Code=pg211&Category_Code=Filters+%26+Apertures




I am sure if you build a static adapter with this glass you will have a device at least equal to the one used in james webb movie. I will let everyone know next week how the thorlabs 1500 ground glass looks

Has anyone tried any of these GG???

http://www.satinsnowglass.com/

http://www.intenscreen.com/products.htm

They have very fine grain and can perhaps save an f-stop.

the satin glass company sounds great . this is a link to the glass I ordered. it also says something about not sandblasting.


http://www.thorlabs.com/ProductDetail.cfm?&DID=6&ObjectGroup_ID=1132&Product_ID=36121

finally , if you browse all the products offered by thorlabs, you can build a 35mm adapter just by ordering parts and screwing them together.
the only drawback being the price, because it is hitech equipment.

this is a still with the static adapter made from filter rings .
with 1500 ground glass and a 60mm fl 50 mm plcx. the plcx was about 3mm away from the ground glass. could not get sharp focus.
liked the shallow dof . will build next one in thorlabs tube system
the camera is a 8 year old one chipper.

http://www.dvinfo.net/media/mellor/PDVD_540.BMP