1/2" and 2/3" CCD Cameras and Letus35 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.

Thread Tools Search this Thread
Old April 20th, 2007, 11:36 PM   #1
Inner Circle
Join Date: Dec 2003
Posts: 4,299
1/2" and 2/3" CCD Cameras and Letus35

For idle interest.

I had the JVC KY-F50 camera out to test a C-Mount film cam lens so offered a Letus35 Flip for XL up to the mount.

It seems that Quyen's current arrangement of a Minolta 50mm SLR lens and other optics he has in the path covers wide enough for a 4:3 2/3" CCD camera, so should work for 1/2" CCD as well.

Skewing the groundglass image around show a bit of brightness fall-off in the corners so you would need to use f1.8 lenses or f1.4 if you could get them and stay in the wider aperture settings.

How native 16:9 2/3" and 1/2" will fare I can't say.

The caveat to this test is that the JVC KY-F50 camera head uses 1/3" CCDs with an aerial image optical path which causes the CCDs to "see" a 2/3" image.

Whilst filming the Letus maintenance clip for Youtube posting, I took the trouble to paint flat black on the inside of the flip enclosure and more particularly, the frosted edge plus about a 1/10" margin around the outer perimeter of the unmounted achromat Quyen uses on front of his Minolta relay lens.

On my specimen at least, there was a noticeable improvement in apparent contrast and colour rendering.

Whilst I would not recommend the average person to dismantle the flip enclosure or disturb the relay lens attachment on back of the flip enclosure if it has not already been disturbed, flat blacking the achromat would be a worthwhile chore.

Make sure you have some thinners handy to clean off any paint spots which fly off the brush, straight away with a cotton tip. A few minutes wll be too late otherwise.

Last edited by Bob Hart; April 20th, 2007 at 11:42 PM. Reason: can't spell
Bob Hart is offline   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

Omega Broadcast
(512) 251-7778
Austin, TX

(973) 335-4460
Mountain Lakes, NJ

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

(800) 238-8480
Glendale, 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



All times are GMT -6. The time now is 06:32 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2015 The Digital Video Information Network