DYI telecine with slide projector lens. The way to go?

[Rollef]

Hi

I got this in the mail today



It's a lens from a slide projector, and as discussed in this thread
viewtopic.php?t=14132&highlight=condenser+lens Videofred suggested another approach to DIY telecine. I wanted to try.

Within a few minutes of arrival the lens looked like this:


And then this happened:



I just taped some cardboar tube to the end of it and that's why it sticks out from the Eumig.

I pushed the dv cam infront of the lens and got this on my first try:



and this




Pros:
No alignment hassel.
Few lens elements that gets dirty
Easy set-up

Ofcourse I need to do some more "research", and I know that a differnt diffuser would be better. But i think this is something worth looking into.

What do you say.

[Mitch Perkins]

What do you say.

I say good work, sir.

Mitch

[El Jeffe]

Nice!! I'm gonna have to start checking ebay for a lens myself

[The Swede]

Hi

It lookes great

I am probably a complete idiot but there are a couple of things that I don´t understand.

You remowed the original projektor lens.... right ?
and you put some taped cardboar tube to the end of the new lens so that it would stick out. Does the lenght of the carboar tube matter? or is it a trial and error to get the best distance between the filmplane and the lens.

Why is a slide projektor lens better than the original projektor lens?


Cheers

Hans

[JL Inc.]

Very nice work, what camera are you using? And is the film gate enlarged?

[christoph]

Why is a slide projektor lens better than the original projektor lens?

i think because it...
- has a larger focal lenght
- has a bigger diameter
- is a prime lens opposed to a zoom

an enlarger lens probably would make a good choice too
++ christoph ++

[Rollef]

We need to get videofred on this thread

VIDEOFRED!

You remowed the original projektor lens.... right ?
and you put some taped cardboar tube to the end of the new lens so that it would stick out. Does the lenght of the carboar tube matter? or is it a trial and error to get the best distance between the filmplane and the lens.

Why is a slide projektor lens better than the original projektor lens?

I pulled out the original lens.
The cardboard tube was from a box of kitchen cellophane I had, and I had to do three attempts to cut it into the right length. First time it was to long, so i just cut some of it off and so on.
The length of the tube matters as this places the lans a certain distance from the filmplane.
My lens is a 2.8/85
That was the first i found and I bought it. 80mm lenses seem to be suggested on this site
http://www.laendchen.de/

I did a test with a normal photographic lens I have so I was pretty shure that it would work.

[Rollef]

Forgot to mention that the image is up-side-down (ofcourse) and some sort of device to mount the camera up-side-down needs to be buildt.
Wee!- this is cool!

[VideoFred]

I got your PM, so here I am :lol:

I'm happy you followed my suggestion, and you have nice results.
But I have not tried this myself, and I'm not a lens expert either...

I suggested this because it's more easy then making a mirror/condenser lens setup.

However, I could make a fine tube for you on my lathe.

PS: sharpness is good, but the colors are looking very flat...
Maybe it's the film? Should be better.

Fred.

[Rollef]

Very nice work, what camera are you using? And is the film gate enlarged?

The DV is a canon MVX 100i if memory serves. The gate is not enlarged. The projector is standar Eumig 607 D and the transfer is done realtime.

VideoFred:

I suggested this because it's more easy then making a mirror/condenser lens setup.

However, I could make a fine tube for you on my lathe.

PS: sharpness is good, but the colors are looking very flat...
Maybe it's the film? Should be better.

I agree that this setup is more easy than the condenser set-up. very easy in fact!.

The film I used is an old faded film, the whitebalance is not completely right and yes the colours are very flat. They should be better indeed. Also a better diffuser would help.

I may take you up on the tube thing. How do make them?

[Carlos 8mm]

Very nice and simple idea!

[Carlos 8mm]

Just a question,

What about with the rear element of the slide projector lens? Did you put it in the rear extreme of the extension tube?

[VideoFred]

I may take you up on the tube thing. How do make them?

You need a lathe and some black Ertacetal, this is an industrial plastic.
Very good stuff for this kind of work. Easy to work on, too.

You can mail me:
info@super-8.be

Now, is this a real film e-mail adress or not

Fred.

[Scotness]

You can do a bit of correction on the first one - but I found the second a bit hard to get a good result on.

The film is obviously from New Guinea - can you tell us a bit about it?

thanks

Scot

[Rollef]

Carlos:

Just a question,

What about with the rear element of the slide projector lens? Did you put it in the rear extreme of the extension tube?

Take a look at the second picture in my first post. On the right hand side you see the lens element. This thing is thre glass lenses inside a small plastic tube. I had to kill the outer shell to make a snug fit to the Eumig.
These three lenses are in their original individual position, and the tube was taped on at the rear of the lens. This means that there is approx 4 -5 cm of tube between the gate and the rear element of the lens.
Maybe other lenses will work in a different way?


Scotness:

You can do a bit of correction on the first one - but I found the second a bit hard to get a good result on.

The film is obviously from New Guinea - can you tell us a bit about it?

thanks

Scot

That is indeed a better picture.

The film is called "Tribes of New Guinea" and is narrated in italian i think. 200ft. Some fade. It is some old stuff I got somewhere. Dancing, body tatoo, daily life. I do not know what they are saying, so I'm not shure.