Nivea Creme on Letus GG??? = degrain image??? at DVinfo.net

Go Back   DV Info Net > Special Interest Areas > Alternative Imaging Methods

Alternative Imaging Methods
DV Info Net is the birthplace of all 35mm adapters.


Reply
 
Thread Tools Search this Thread
Old April 28th, 2007, 04:34 AM   #1
Regular Crew
 
Join Date: May 2006
Location: Poland
Posts: 65
Nivea Creme on Letus GG??? = degrain image???

Hey Everybody
I heard about tips with Nivea creme put on GG of many lens adapters.
Results are : clean image, more light and degrain (with less light lenses)
Is it true??
Anyone tried it with Letus GG???
What the effect was with Letus???
Regards
Tomasz Ostrowski is offline   Reply With Quote
Old April 28th, 2007, 08:39 AM   #2
Inner Circle
 
Join Date: Dec 2003
Location: PERTH. W.A. AUSTRALIA.
Posts: 4,356
I seem to recall that the builder who used Nivea cream on a groundglass moved on to making finer groundglasses and finessing his adaptor without resort to Nivea cream.

I suggest you contact Quyen Le to see what damage might be done to his groundglass.
Bob Hart is offline   Reply With Quote
Old April 28th, 2007, 12:47 PM   #3
Regular Crew
 
Join Date: Aug 2006
Location: Lugano, Switzerland
Posts: 149
It could work, but what about too much diffusing collateral effect?
Giovanni Speranza is offline   Reply With Quote
Old April 28th, 2007, 12:55 PM   #4
Wrangler
 
Join Date: Oct 2003
Location: DFW area, TX
Posts: 6,108
Images: 1
The obvious advantage to this method is that your camera will smell nicer.

Sorry guys, couldn't resist. ;-)

-gb-
Greg Boston is offline   Reply With Quote
Old April 30th, 2007, 03:22 AM   #5
Regular Crew
 
Join Date: May 2006
Location: Poland
Posts: 65
Thanks:)

Thanks for your comments. I modified my Letus myself (without nivea creme) two day ago. In my opinion it works better now. There is more light and i can see more area in the image.
Regards.
Tomasz Ostrowski is offline   Reply With Quote
Old April 30th, 2007, 09:50 AM   #6
Major Player
 
Join Date: Aug 2003
Location: Poplarville, MS
Posts: 453
Tomasz: Seems like you would get more of a hotspot with this. I'm familiar with Nivea but not sure exactly how it looks, so maybe it does work better than, say, vaseline or similar smeared on the glass.
Frank Ladner is offline   Reply With Quote
Old April 30th, 2007, 10:02 PM   #7
Trustee
 
Join Date: Feb 2006
Location: Niagara Ontario Canada
Posts: 1,121
What did you do to mod the letus? Any details, pics?
David Delaney is offline   Reply With Quote
Old May 1st, 2007, 10:22 AM   #8
Tourist
 
Join Date: Apr 2007
Location: Columbus, GA
Posts: 2
Allen Matthews

Quote:
Originally Posted by Tomasz Ostrowski View Post
Thanks for your comments. I modified my Letus myself (without nivea creme) two day ago. In my opinion it works better now. There is more light and i can see more area in the image.
Regards.
I bought the Letus adaptor a few weeks ago and use it with a JVC HD 100U. While it looks very good in outdoor conditions (5600K) I have a problem getting enough light for interior shooting. I am using a Nikon 50mm f1.8 with both the adaptor iris and the lens apeture wide open. Has anyone else experienced this issue?
Allen Matthews is offline   Reply With Quote
Old May 1st, 2007, 11:21 AM   #9
Regular Crew
 
Join Date: May 2006
Location: Poland
Posts: 65
I removed the MIRRORS PART from my letus HD100. Now I'm working on JVC HD200 so I can easily flip my image from the camera settings and record image uprigth:). I connected both, remaining parts(mount to the camera and lens mount)with the tube in length 19cm. And today was the last, most important modification. On my own risk i decided to put the nivea creme on Ground Glass (matte side).
The results are :
- less light loss,
- wide images (50mm = 50mm etc.), almost all magifications removed:)
- nivea creme = cleaner picture and more transparent GG
- now i can use fast shutter speeds without dirts in the image (from 120-500 per sec. but tested with lenses with light 1.2, 1.4)
- unfortunately bigger size of my adapter, but i am not crying about it:)
My first test video with modified LetusHD100 is here :
http://www.dvinfo.net/conf/showthread.php?t=92925 (but it was shoot before i used Nivea on GG)
Maybe tomorrow I'll put some pictures of my new letus version.

Greetings

Last edited by Tomasz Ostrowski; May 1st, 2007 at 04:21 PM.
Tomasz Ostrowski is offline   Reply With Quote
Old May 2nd, 2007, 03:34 PM   #10
Tourist
 
Join Date: Apr 2007
Location: Columbus, GA
Posts: 2
Thank you for the information!

Which of the modifications to you credit with the gain in light?
Allen Matthews is offline   Reply With Quote
Old May 4th, 2007, 01:13 PM   #11
Trustee
 
Join Date: Jun 2005
Location: Hollywood, CA
Posts: 1,675
Images: 1
All the cream is doing is filling in the deeper pits of the ground glass (they tend to cause the darker specks of grain) and decreasing it's effective diffusion.

This should only be done if you are experiencing too much light loss (be fair to the adapter, 1.5 stop light loss is not excessive) or if you can't zoom in enough past any vignetting you might have. Bokeh rendition and the effective depth of field will all decrease with the application of the cream.
__________________
BenWinter.com
Ben Winter is offline   Reply With Quote
Old May 5th, 2007, 02:34 AM   #12
Regular Crew
 
Join Date: May 2006
Location: Poland
Posts: 65
Ben, I used nivea creme on my own risk. I put it on GG (matte side).
My notes:
more light, clean picture (even in high speed shutter 1/120-1/250) and the same DOF.
Its only my personal opinion and i'm not recommend to anybody to do it yourself.
Regards
Tomasz Ostrowski is offline   Reply With Quote
Old May 10th, 2007, 04:59 PM   #13
Tourist
 
Join Date: Jan 2006
Location: palermo
Posts: 1
Old lcd part as GG

Hi, sorry in advance if my english could be poor...
The experiment of nivea creme is interesting.. but could give some imperfection in projection...however I will try on original Letus35flip GG
I tried to exchange original GG (i think a newton Glass, perhaps the costless and optically acceptable solution) with a component of an old 1,5" LCD from a broken digital camera. One of the backlight's layers is the best GG solutions (unfortunately plastic-made) that I tried, 'cause its surface gives a so irregular grain (most of times not very visible in good light conditions) to totally disappear with vibration mechanism on.
The only thing is that is very difficult to have this kind of material. Only disassembling old lcds (and maybe not every kind...)
Ivan Monterosso is offline   Reply With Quote
Old May 13th, 2007, 03:52 AM   #14
New Boot
 
Join Date: Jun 2006
Location: Newport Beach, CA
Posts: 19
lets see those pics :)
Cory Lange is offline   Reply With Quote
Old May 13th, 2007, 12:01 PM   #15
Trustee
 
Join Date: Nov 2005
Location: Sauk Rapids, MN, USA
Posts: 1,675
I have a huge chunk of that from a laptop LCD screen. Anyone want to buy it ;)
__________________
Web Youtube Facebook
Cole McDonald is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Special Interest Areas > Alternative Imaging Methods

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 11:13 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network