8mm Forum: My first post ! 16mm projector Lens Hack

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Posted by Vangelis Lympouridis (Member # 1753) on September 27, 2009, 05:28 PM:

Hello,

I am new to this forum and to the 16mm film world and this is my first post! I ve learned so much reading older posts during the past few months...and I would like to thank you all!
It was a sad surprise for me when I realized that most projectors are equipped with 50mm lenses producing sharp but very small image at a common room size projection. (around 6-7m distance from the wall in my case)
Unfortunately wide lenses for projectors are rare and expensive so I tried to work out another solution. After several attempts I finally managed to enjoy a sharp 1.80cm to 1.40cm projection with a cheap lens conversion. I used a 2x 52mm teleconverter bought in ebay for 20£ which I attached reversed at the end of my projector's lens. The image was surprisingly crisp.
If you want more info or images from this hack please contact me and I will be happy to share. Best,

Posted by Paul Spinks (Member # 573) on September 28, 2009, 09:16 AM:

Hi Vangelis and welcome,
I am constantly amazed at the ingenuity of collectors in getting around little problems. It's what makes this hobby of ours such fun. I also agree that this forum is such an excellent source of help and advice from all over the world that I don't know how I would manage without it.

Paul.

Posted by Darren Payne (Member # 1517) on September 29, 2009, 03:05 AM:

Hey there Vangelis,

Sounds great, can you post a picture of the set up for us to see?

Thanks and welcome.

Posted by Vangelis Lympouridis (Member # 1753) on September 29, 2009, 04:08 AM:

Thank you for your interest and your warm welcome.
The lens I used was a 52mm 2X High Definition Tele Converter. The cheapest one I got was for 20£ or 29$.
The lens has to be placed reversed. It is bigger than the projector's lens so you need to put some soft material between the two. I ve used blue tack, but there are other more pro solutions. It needs to be attached straight!
Finally I used strong gaffer tape to secure them.
I was sooo happy with the result ! (my friends too... ;-)
I will try to post an image of the projection with and without the attached lens the following days for you to compare.
best~
Check lens image @
http://panorama.net16.net/poingpoingdotpoing/lens_web.jpg

Posted by David Pannell (Member # 300) on September 29, 2009, 04:58 AM:

Hi Vangelis and again, welcome to the Forum. We're all a bit nuts here, but it's really good fun, and you WILL make a lot of new friends.

Very ingenious conversion - well done! the pics are very interesting.

I think I must be one of the few who enjoys the smaller but better resolution picture on the screen, as I usually project with a 50mm or 2" lens, giving approx. a 1M wide picture. Anyway, - whatever turns you on, - so to speak.

Enjoy!!!

With best regards,

Posted by Jean-Marc Toussaint (Member # 270) on September 29, 2009, 08:08 AM:

Hello Vangelis, welcome to the forum.

Very clever contraption. I just used a similar assay on my VP using a converter taken from my 35mm projector to reduce the size as I was projecting from a long way away... [Wink]

Posted by Steven J Kirk (Member # 1135) on September 29, 2009, 10:25 AM:

I use a VP lens on 16mm also. I have an Epson wide expander lens that is plus 20 percent. The rear element is huge. It would cover 35mm. My NT1 uses a 25mm lens, already very short and wide, to get 4ft by 3ft in my living room. For prints that are widescreen masked or to get that Imax effect, I have the Epson lens on a retort stand - a lab stand - in front. Excellent results. Epson lens = £35, lab stand = £20, both eBay UK.

Posted by Vangelis Lympouridis (Member # 1753) on September 29, 2009, 01:57 PM:

Hello David ! Hello Jean-Marc ! Hello Steven !

Thanks for adding up to the conversation. I do enjoy a big projection and the result in terms of resolution is not bad at all I think... Steven I tried to find out what an epson wide expander is...no luck.Can you please post more details or a photo?
Jean-Marc is it a theater you live in? hehe reduce the size? that is amazing ! I am sure you enjoy your projections a lot :-)
Best regards
V.

Posted by Jean-Marc Toussaint (Member # 270) on September 30, 2009, 01:41 AM:

Vangelis, yes, I have a cinema in my basement, but the converter on my VP was used at a venue I was renting for a music festival.

Posted by Vangelis Lympouridis (Member # 1753) on September 30, 2009, 03:54 AM:

Hello Jean-Marc

Was that "babes of Metal"?? It seems so cool..! I missed this years festival but I will put it on my calender for the next year. Should I suppose that you were VJing with film projectors or there were also some film projections during the festival?
Anyway as this getting out of context please email me at
<myname>@<my surname>.gr
Have a nice day, all

Posted by Jean-Marc Toussaint (Member # 270) on September 30, 2009, 04:38 AM:

Vangelis, yes that was the "babes of metal" festival. I'm the producer/manager of Wildpath, the headline act.
The festival was put together to celebrate the release of their second album and turned out to be a success and I'm considering an extended version (ie- whole week-end) for next year.
Report can be seen on this web page.
Now, back to topic, the VP and converter were used for two reasons :
1 - Wildpath's show starts with a video projected on the curtain that ends with the band's logo. The curtain opens and the logo is projected on the band itself.
2 - During stage changes, there was a slide show promoting all the "babes". Said slide-show can be seen here

Posted by Vangelis Lympouridis (Member # 1753) on September 30, 2009, 04:52 AM:

Oupsss.
Now I got it... you used a lens from a 35mm to a Video Projector (VP) aaaaaha!... now suddenly all makes sense :-)
Thanks...and I was wondering what this VP was in film slang... Thats great it seems like you had an excellent time there..
Maybe we should arrange a gig in Edinburgh the Gothic surrounding is great for this music and of course for a video clip for the band ;-)
best~

Posted by Steven J Kirk (Member # 1135) on September 30, 2009, 10:34 AM:

The Epson lens is the 'wide conversion lens' ELPCW01. I only have the manual in Japanese and it has no lens 'value' markings on the barrel. I said plus 20 percent but in fact taking 4 ft wide to 6 is plus a third. Now I think about it. It works well but is a huge piece of glassware weighing 650g.

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