GG...should the ground side face the lens or the camera? 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 October 30th, 2006, 09:08 AM   #1
Trustee
 
Join Date: Aug 2006
Location: London UK
Posts: 1,939
GG...should the ground side face the lens or the camera?

if so, what happens if you have it the other way around?

My adaptor has the ground side facing the camera...
__________________
Philip Bloom
Cinematographer, Director, Filmmaker www.philipbloom.net
Phil Bloom is offline   Reply With Quote
Old October 30th, 2006, 09:49 AM   #2
Major Player
 
Join Date: Nov 2005
Location: Tartu, Estonia
Posts: 579
It should be fine even with frensel focusing screens.
Lens flange to focal plane distance should be readjusted.

T
Toenis Liivamaegi is offline   Reply With Quote
Old October 30th, 2006, 09:56 AM   #3
Trustee
 
Join Date: Aug 2006
Location: London UK
Posts: 1,939
It's just all I have read on forums, web pages say the ground side should face the SLR lens...I was wondering what the difference would be...

I have a permanent film of grain over everything I shoot under all sorts of different lighting conditions, camera settings, lenses etc...trying to work out what the culprit is
__________________
Philip Bloom
Cinematographer, Director, Filmmaker www.philipbloom.net
Phil Bloom is offline   Reply With Quote
Old October 30th, 2006, 12:09 PM   #4
Inner Circle
 
Join Date: Feb 2004
Location: switzerland
Posts: 2,131
since you are trying to capture the maximum of light coming from the lens, i think the grounded side must face the SLR.
your picture will be created at the best place (a flat, matte surface) and the light will not have to travel thru the glass.
if you use a plano convex lens to act as GG+condensor, you even will get the best setup, since the light coming from the GG goes directly to the right direction.
if you a doing the reverse, i see several issues.
the light coming from the SLR could reflect on the shiny,non-flat face of the lens.
having a coated lens would help.
if the light has to go accross the lens before forming the image, you do not really know what will happens, especially with unknown lens, or when you change the SLR lens. Again creating the image on a flat surface is the way it works in a camera, and it is the way lenses a built for.
The only drawback of having the gg facing the SLR, is dust protection.
If you have to add another layer of glass to protect it, you go back to the issues mentionned above.
Giroud Francois 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 10:25 AM.


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