GG Question for the Masters 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 July 3rd, 2006, 06:11 PM   #1
Major Player
 
Join Date: Aug 2005
Posts: 119
GG Question for the Masters

I just finished mocking up my first "successful" gg adapter. It's a static adapter that uses medium format lenses to project on a larger 83mm dia focusing screen to reduce the relative size of the grain. My GG is an old series 9 skylight filter that I sanded by hand so the picture quality is much less than fantastic. I used 2 dcx fl 111mm lenses to get rid of the hotspot and the image is nice and bright. I lose about 1.5 stops with a f2.4 105mm lens (almost seems impossible). My question is what would be the ideal gg for this setup. I'd like it to be as sharp and bright as possible and I'm not overly concerned with bokeh.........yet. Thanks for the help, Jason.
Jason Varner is offline   Reply With Quote
Old July 3rd, 2006, 11:56 PM   #2
Trustee
 
Join Date: Jun 2005
Location: Hollywood, CA
Posts: 1,675
Images: 1
A medium format focusing screen would probably serve you best. They don't diffuse completely and therefore give you a crisp, bright image at the expense of good bokeh.

http://www.intenscreen.com/products_medium-format.htm

Browse through the screens they have available and pick one without any markings or split-prisms etched in it. I think you will be pleased with the results. I would suggest the Mamiya 83330 as one to look into.
__________________
BenWinter.com
Ben Winter is offline   Reply With Quote
Old July 4th, 2006, 03:54 AM   #3
Major Player
 
Join Date: Aug 2005
Posts: 119
Thanks, i'm trying to do as little beta testing as possible because it can be quite costly. I've heard that the beatties were nice but I didn't want to blow 2 bills just to find out that the 400 grit is the shizzle. Thanks again, Jason.
Jason Varner is offline   Reply With Quote
Old July 4th, 2006, 11:53 AM   #4
Trustee
 
Join Date: Jun 2005
Location: Hollywood, CA
Posts: 1,675
Images: 1
400 grit's probably going to give you visible grain, even in medium format. If you're looking for a static solution, nothing lower than 1000 grit, in my opinion.
__________________
BenWinter.com
Ben Winter is offline   Reply With Quote
Old July 6th, 2006, 07:27 PM   #5
Regular Crew
 
Join Date: Dec 2005
Location: Lund, Sweden
Posts: 122
I have given up a static solution, however I got great results with a Beattie 83410 (Bronica ETR) medium format gg. It had no kind of hotspot and was very bright. Nearly no lightloss at all. Too bad the one I got was all scrathed so it wasn't usable. However, my dream config of an adapter is a vibrating Beattie as GG. My opinion is that it has to be vibrated otherwise the "fresnel rings" will show up in some light conditions.

Overall I find a Beattie solution appealing just because it doesn't require any kind of optics like condensers or similar, just a macro for the camcorder. I like simplicity.
__________________
http://www.nattvard.com
Carl Jakobsson 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 09:05 AM.


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