New moving ground glass mechanism

Dan Diaconu · April 27th, 2005, 01:36 PM

I have just sent you another one. Did so a while ago when you said "let's chat"

Dan Diaconu · April 27th, 2005, 02:03 PM

Just did a test on POC GG two days ago and here is what I have found:
the GG has the best diffusion of all GG I have tested (finest grain structure)
almost perfect for static. (grain is visible on soft areas but the grain is much finer than Beattie focusing screens)
light loss is above 3 stops (good enough for exterior day time) but almost unusable indoors (without proper lights)
soft focus is nicer than the way it looks on Beatty (subjective)
vigneting big time, (no surprise) just as any other GG.
Confusion: (I mean conclusion) : nice softs, razor sharp sharps, light loss, vigneting (you could avoid some of it zooming-in more and using FASTER lens)
very thin (bends easy) potential planarity issues. Best (I know)for static and worth a try but proceed at your own risk.

Dan Diaconu · April 27th, 2005, 07:31 PM

and added some stills from last weeks of footage:

http://dandiaconu.com/gallery/Work-samples

Leo Mandy · April 27th, 2005, 08:35 PM

Dan , what does the POC stand for?

Dan Diaconu · April 27th, 2005, 10:30 PM

Physical optics corp.
http://www.poc.com/lsd/default.asp
it has been mentioned a while ago...here or on another thread.

Steve Brady · April 28th, 2005, 01:51 AM

Dan, which GG from POC did you try? Their Light Shaping Diffusers offer a very wide range of diffusion angles, which (I'd guess) would have a significant effect on the amount of vignetting and light loss.

Dan Diaconu · April 28th, 2005, 08:02 AM

50 deg. Very nice image but the cost is light.

Dan Diaconu · April 28th, 2005, 09:26 AM

I owe it to myself. I took some stills of POC vs. Beatty. I am too old to fall in love, but the image is gorgeous (well,...except the light loss) and also the vigneting is ok (not that bad that is) (and the fine grain allows a zoom in to get rid of it).

http://dandiaconu.com/gallery/album15

Oscar Spierenburg · April 28th, 2005, 10:05 AM

Is this shot static? Looks very good.
I had the same with tracing paper (on rotating GG), it had beautiful DOF and mid-tones, but too much light loss.

Anyway, nice of them to allow you to play around with camera equipment in prison.

Dan Diaconu · April 28th, 2005, 12:55 PM

THAT was a hell of a good one!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
took me some 5 seconds (like five years) to figure it out!!!!!!!!!!!!!!!!!!!!!!!!!!!
oh man........ that was good........... give us some more............rotf

Oscar Spierenburg · April 28th, 2005, 04:05 PM

I wanted to post a contented smile, but Smilies are Off.

EDIT:
Great images really, (that part was no joke.)

Dan Diaconu · April 28th, 2005, 04:28 PM

which ones? outside the prison?

Oscar Spierenburg · April 28th, 2005, 05:13 PM

No, your actual black chapter: album15
I like the POC, for exterior shots, it'll be great, because the light loss is more of a gray filter, right? So I'm looking forward to outdoor tests when you are on parole.

Dan Diaconu · April 28th, 2005, 05:51 PM

The actual structure of the grain is different from Beatty. Most rewarding would be outdoor portraits .......
Found a 1.2/50. BEAUTIFULL lens but Pentax mount.
still dreaming of this lens:
http://www.alaska.net/~rowlett/image...ilux/mimi4.htm
but at 3k..... it will have to wait.... a bit

Oscar Spierenburg · April 29th, 2005, 05:02 PM

Never really seen anything like this (I mean the organic DOF effect, not the girl)
It would be terrific on DV. Incredible, especially on B/W I think, now I reconsider to shoot B/W (not with such a lens though >3K)

April 27th, 2005, 01:36 PM	#346
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	I have just sent you another one. Did so a while ago when you said "let's chat"

April 27th, 2005, 02:03 PM	#347
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	Just did a test on POC GG two days ago and here is what I have found: the GG has the best diffusion of all GG I have tested (finest grain structure) almost perfect for static. (grain is visible on soft areas but the grain is much finer than Beattie focusing screens) light loss is above 3 stops (good enough for exterior day time) but almost unusable indoors (without proper lights) soft focus is nicer than the way it looks on Beatty (subjective) vigneting big time, (no surprise) just as any other GG. Confusion: (I mean conclusion) : nice softs, razor sharp sharps, light loss, vigneting (you could avoid some of it zooming-in more and using FASTER lens) very thin (bends easy) potential planarity issues. Best (I know)for static and worth a try but proceed at your own risk.

April 27th, 2005, 07:31 PM	#348
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	and added some stills from last weeks of footage: http://dandiaconu.com/gallery/Work-samples

April 27th, 2005, 08:35 PM	#349
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Dan , what does the POC stand for?

April 27th, 2005, 10:30 PM	#350
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	Physical optics corp. http://www.poc.com/lsd/default.asp it has been mentioned a while ago...here or on another thread.

April 28th, 2005, 01:51 AM	#351
Steve Brady Regular Crew Join Date: Feb 2005 Location: Rainham, Kent, UK Posts: 69	Dan, which GG from POC did you try? Their Light Shaping Diffusers offer a very wide range of diffusion angles, which (I'd guess) would have a significant effect on the amount of vignetting and light loss.

April 28th, 2005, 08:02 AM	#352
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	50 deg. Very nice image but the cost is light.

April 28th, 2005, 09:26 AM	#353
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	I owe it to myself. I took some stills of POC vs. Beatty. I am too old to fall in love, but the image is gorgeous (well,...except the light loss) and also the vigneting is ok (not that bad that is) (and the fine grain allows a zoom in to get rid of it). http://dandiaconu.com/gallery/album15

April 28th, 2005, 10:05 AM	#354
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	Is this shot static? Looks very good. I had the same with tracing paper (on rotating GG), it had beautiful DOF and mid-tones, but too much light loss. Anyway, nice of them to allow you to play around with camera equipment in prison.

April 28th, 2005, 12:55 PM	#355
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	THAT was a hell of a good one!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! took me some 5 seconds (like five years) to figure it out!!!!!!!!!!!!!!!!!!!!!!!!!!! oh man........ that was good........... give us some more............rotf

April 28th, 2005, 04:05 PM	#356
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	I wanted to post a contented smile, but Smilies are Off. EDIT: Great images really, (that part was no joke.)

April 28th, 2005, 04:28 PM	#357
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	which ones? outside the prison?

April 28th, 2005, 05:13 PM	#358
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	No, your actual black chapter: album15 I like the POC, for exterior shots, it'll be great, because the light loss is more of a gray filter, right? So I'm looking forward to outdoor tests when you are on parole.

April 28th, 2005, 05:51 PM	#359
Dan Diaconu Major Player Join Date: Dec 2004 Location: Vancouver, Canada Posts: 804	The actual structure of the grain is different from Beatty. Most rewarding would be outdoor portraits ....... Found a 1.2/50. BEAUTIFULL lens but Pentax mount. still dreaming of this lens: http://www.alaska.net/~rowlett/image...ilux/mimi4.htm but at 3k..... it will have to wait.... a bit

April 29th, 2005, 05:02 PM	#360
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	Never really seen anything like this (I mean the organic DOF effect, not the girl) It would be terrific on DV. Incredible, especially on B/W I think, now I reconsider to shoot B/W (not with such a lens though >3K)