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My 35mm Adapter * WARNING PICS*

Posted: Thu, 8th Sep 2005, 9:29pm

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sk8npirate

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Well everybody I have been working on a 35mm lens adapter for my panasonic pv-gs150 for a little while now. And today, my Nikon D screen (Which would be used as Ground glass) came. So I put it in and gave it a go. And this is what I got:













Still some dust in the contraption. But let me know what you think.
Posted: Thu, 8th Sep 2005, 9:35pm

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cdolsen

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can you give details of how it's made?
Posted: Thu, 8th Sep 2005, 9:36pm

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sk8npirate

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Ill post some picks of my WIP adapter. Right now its pretty rag tag. But I hope to make it somehow look better. Pics of adapter will be up soon.

And pretty much how its made. Is you have some tube like structure. Where you need a 35mm SLR lens, ground glass (which is where the image projects), and in most cases you also need a macro lens to focus on the ground glass up close. Its pretty simple, and quite cheap.
I bought the Nikon D screen(Focusing screen used as ground glass), and a cheap +10 asian macro from ebay. I also got some pvc to house it at home depot. I had the 35mm lens previously from an SLR camera.
Posted: Thu, 8th Sep 2005, 9:45pm

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ben3308

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What exactly does the 35mm adaptor do? Does it significantly increase picture quality or something?
Posted: Thu, 8th Sep 2005, 9:52pm

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sk8npirate

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It gives a shallow depth of field like 35mm film.
Posted: Thu, 8th Sep 2005, 9:53pm

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Arktic

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Basically, a video camera is designed to have a very large Depth-Of-Field, meaning that most of the shot is infocus at once. This is very different to SLR or movie cameras, which use a very shallow DoF, often to interesting effect.

It's one of the things that makes consumer video look like consumer video and not like film.

You might think that just attaching a lens will make the DoF shallower, but it doesn't work like that - you'd effectively have to replace your CCD with one of a different size in order to acchieve the effect.

However, by attaching a 35m lens which projects onto something else (usually a ground glass screen), and zooming the camera in on that projection, you can create a shallow DoF, which looks very nice.

I hope this helps explain. Search the forums for "Mini35 Adaptor" or "Depth of Field" for more info.

Cheers,
Arktic.
Posted: Thu, 8th Sep 2005, 9:55pm

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sk8npirate

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Well I have to go out right now but ill post pics of my adapter later on this evening.
Posted: Thu, 8th Sep 2005, 10:45pm

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ben3308

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Okay, I get it. But why not just stand further back and zoom in to get the same shallow DoF? It works too.
Posted: Thu, 8th Sep 2005, 10:51pm

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Serpent

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Ben, see the plant still? The two objects are very close and the camera is actually a bit far away. There is NO WAY you could achive that from just zooming in because first of all, it would be zoomed in. Also, they are two close for you to get the same effect.

sk8npirate, very nice stills.
Posted: Thu, 8th Sep 2005, 10:54pm

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ben3308

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No, you I'm pretty sure you CAN get the same effect, it just takes some tweaking. I have a Sony DCR-PC110 with a manual focus ring adapter. It still has a pretty deep DoF, but I can get objects similar to those if I stand back about three feet then zoom in.

I'd post pics, but I dropped my camera and now it's friggin broken.
Posted: Thu, 8th Sep 2005, 11:15pm

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Arktic

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Though it's true that you can slightly alter the DoF by zooming in, as far as I know, nothing is capable of as good of an effect as using a mini35 adapter. Again, search the forums for more on the topic.
Posted: Thu, 8th Sep 2005, 11:20pm

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Serpent

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sk8npirate, how much did this all cost?
Posted: Thu, 8th Sep 2005, 11:38pm

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TheRenegade

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Thats really cool and conicdental as well because I am just about done with my 35mm adapter. Here are two pics of my adapter that I made from this website http://home.comcast.net/~wauhkies/adapter/index.html. I cant wait to finish it and show you guys more as well as see more of your adapter Sk8nPirate. What type of lense are you using and how did you attach the focusing screen? Looks really sweet man.





P.S. I hope I am not stealling you wind or anything I just thought it would be better to post here instead of making a new thread. Some great site for this kinda stuff are http://www.dvinfo.net/conf/forumdisplay.php?f=70
http://redrockmicro.com/
http://guerilla35.com/newdemo.html
Posted: Fri, 9th Sep 2005, 12:33am

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Serpent

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Not saying anything in offense to your seup, sure it's great. But that looks real funny looking. razz Mainly the second pic. Looks like a caricature version of a camera.
Posted: Fri, 9th Sep 2005, 1:07am

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sk8npirate

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TheRenegade the lens im using right now is a Pentax but I hope to get a better lens eventually. It's giving pretty good results right now. My setup looks pretty much exactly like yours Renegade except I still need to build support to hold the adapter. Right now it just attaches to my camera by step down ring and I always hold it to make sure I have support on it.
I attached the focusing screen by placing the screen in a 52mm UV filter ring. It fits about perfectly, with just a little tweaking.
The setup cost total about $50 without the lens. You can get the lens i use for about $60 so I guess total would be $100. I did use some filters I had lying around though for spacers. There is other ways. If you have an slr camera you can do it really cheap.
Posted: Fri, 9th Sep 2005, 1:32am

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Aculag

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That camera grabs some great colors. I hope you have a good eye, or this thing will be a waste. wink
Posted: Fri, 9th Sep 2005, 1:35am

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sk8npirate

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Thanks Aculag. Hopefully not. I am entered in the third dv challenge that the theme just got released today. The theme is "Cameras", which is not what I was expecting at all. But i have some ideas cooking in my noggin.

Oh yeah and here is that dv challenge thing http://www.thedvchallenge.com/
Posted: Fri, 9th Sep 2005, 1:42am

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Kid

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Well well done for trying and getting a working system but personally I dont understand why people bother with this sort of thing.

Shallow depth of field is very easy to fake in post and the quality you lose in adding extra lenses is quite drastic.
Posted: Fri, 9th Sep 2005, 1:44am

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sk8npirate

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Kid wrote:

Shallow depth of field is very easy to fake in post and the quality you lose in adding extra lenses is quite drastic.
Well I'd rather not deal with doing frame by frame masking for fake DoF. It is much better this way. And I don't think the quality hit is that drastic. It's definitely there but I like the look much better with an adapter. I really don't agree with it being easy to fake in post. Especially handheld its nearly impossible. Post DoF will never be as good as filming it that way IMO.

Thanks though. It was a lot of work.
Posted: Fri, 9th Sep 2005, 2:20am

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Hendo

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sk8npirate wrote:

I attached the focusing screen by placing the screen in a 52mm UV filter ring.
Firstly, very nice work! But is a static ground glass going to do the trick? Actually, judging from your pics I guess it does look good. :-) But do you eventually plan to make it move in order to reduce grain?

Also, I added the "Home Depot 35mm Adapter" link that TheRenegade posted to the list of 35mm adaptor tutorials in my Beginner's Guide to Understanding and Using Depth of Field (DOF).
Posted: Fri, 9th Sep 2005, 2:23am

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sk8npirate

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Well their is still going to be grain in my current method. I eventually want to try a vibrating method. This will have to do for now though. This is just my first version.

Thanks for the link Hendo. I'm surprised I didn't see that before.
Posted: Fri, 9th Sep 2005, 2:41am

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TheRenegade

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Serpent wrote:

Not saying anything in offense to your seup, sure it's great. But that looks real funny looking. razz Mainly the second pic. Looks like a caricature version of a camera.

Yes you are right no offense taken at all. Its one of those things that either looks cool or just insanely out of hand.
Sk8nPirate that looks sweet. I am using a Pantax 50mm lense as well (same one maybe?). Where did you get the focusing screen and how much did it cost?
And yes I also want to get a better lense, maybe a Canon or Nikon 28-90mm zoom lense (Having manual zoom and focus is pretty sweet).

Last edited Fri, 9th Sep 2005, 2:45am; edited 1 times in total.

Posted: Fri, 9th Sep 2005, 2:44am

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sk8npirate

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http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=37515&is=REG&addedTroughType=search
Posted: Fri, 9th Sep 2005, 2:45am

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TheRenegade

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Sweet thanks so much. How exactly did you attach it to the filter?
Hendo you might want to add this link to the DOF Faq as well, http://letus35.com/. Its another manufactured adapter that is much cheaper than the others.

Last edited Fri, 9th Sep 2005, 2:55am; edited 1 times in total.

Posted: Fri, 9th Sep 2005, 2:50am

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sk8npirate

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Well it was pretty ragged but, It fit pretty much perfectly in the ring, except for my use of green electrical tape around the edge to make a tighter fit.
Posted: Fri, 9th Sep 2005, 2:56am

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TheRenegade

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And you just stuck it in there without gruing or anything. Is it stable and reliable?
Posted: Fri, 9th Sep 2005, 3:02am

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sk8npirate

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Well the tape was just for my test. I am going to glue it in there ASAP
Posted: Fri, 9th Sep 2005, 3:13am

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TheRenegade

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Wow thats really sweet man, the screencaps look great. The only thing I noticed was a couple small specks, is the focusing screen just dirty or were they in the focusing lense itself? Nonetheless it looks great and it really cool to see someone else doing this as well. I really think these adapters will make a huge difference in the look and feel of you films (that is not to say that these will make your films better, any good film starts with a good story) but this is definitely a step in the right direction.
Posted: Fri, 9th Sep 2005, 3:17am

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sk8npirate

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Yeah renegade I haven't really checked whats dirty yet, but I think its the lens. I haven't cleaned it in awhile. I have to clean it before I shoot for the dv challenge so I dont have the specks. Hopefully it will help my films look better, but I know that doesn't depend on the adapter.

Thanks and now im off to bed.
Posted: Fri, 9th Sep 2005, 3:26am

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ben3308

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I found a forum thread from another site with EVERYTHING you need to know, links, pics, videos, and places to buy the items.

http://forums.studentfilms.com/groupee/forums/a/tpc/f/2246029451/m/1381051722/p/1

If you want to build an adapter, go there.
Posted: Fri, 9th Sep 2005, 1:44pm

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Kid

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I'd like to see some full size grabs with and without the lens to see what the quality difference actually is.
Posted: Fri, 9th Sep 2005, 2:04pm

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padawanNick

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Anychance you can post a short, full res clip somewhere.
I'm really curious to see how the static grain pattern affacts the results.
Though .... you could potentially create a template for masking out the grain by shooting a white card to capture an image of just the grain.

Mmmmm.... BTW, one way to get a focusing screen cheap is to look for an old damaged SLR camera on eBay being sold "for parts". This would also potentially net you a lens mount. smile

Looks great!
Nice work.

Have fun.
Posted: Fri, 9th Sep 2005, 7:53pm

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ben3308

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There are short, full quality clips at the link I posted three replies back.
Posted: Fri, 9th Sep 2005, 9:19pm

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TheRenegade

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These clips were made using the Guerilla 35 which is not the same design as Sk8nPirate's but is the same concept (Static adapter instead of rotating).
Can't wait to see footage from your adapetr Sk8nPirate!

[Edit] Link should work now.

Last edited Sat, 10th Sep 2005, 3:17am; edited 1 times in total.

Posted: Fri, 9th Sep 2005, 10:01pm

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devilskater

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the link doesnt work for me...

Cheers,
d.
Posted: Fri, 9th Sep 2005, 10:40pm

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Andreas

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just check the link one slash to many
http://guerilla35.com/newdemo.html
Posted: Sat, 10th Sep 2005, 3:05am

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sk8npirate

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I just got home from a long day, so If I dont post footage tonight I will tomorrow.
Posted: Sat, 10th Sep 2005, 3:42am

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Serpent

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sk8npirate, if you need a host e-mail me. admin@cpostudios.com