Hd100's sweet spot? at DVinfo.net

Brian Luce · January 28th, 2007, 05:33 PM

A lot of people say video cams often work best at 5.6. What are findings with the hd100?

Eric Darling · January 28th, 2007, 07:06 PM

f4 - at least with the stock lens.

George David · January 28th, 2007, 07:07 PM

Brian, great question. That was what I wanted to find out today. As we all know, wide angle with the stock lens just plain sucks in resolution compared to say an XLH1. So I wanted to find the sweet spot of the fuji 16x for myself. In short, I get the sharpest images @ f5.6 and the focus barrel @ 15 feet. At the longer end, the HD100's stock lens just shines (f2.8 to f8.0) except at full telephoto. This is all from my unscientific tests.

George David · January 28th, 2007, 07:15 PM

Eric's answer may be a lot more accurate than mine.

Eric, you live in Savannah? That's my 2nd favorite city (1st is Charleston). I used to live in S. Carolina!!! Now I'm stuck in the ice box capital of the west. But at least Sundance is here.

Steve Oakley · January 29th, 2007, 12:19 AM

2.8-4

at 5.6 there is generally too much DoF unless you want deep DoP

once you go past 8, you start running into pinhole effects from the smaller apeture. I often flip the ND filter on, even when shooting inside to get back to 2.8 1/2

Steve Oakley

Marc Colemont · January 29th, 2007, 03:49 AM

Outdoors in the sun I add an ND .6 on top of the ND 2 of the camera to reach the f4.

Werner Wesp · January 29th, 2007, 06:41 AM

It's all a bit dependant on taste, I suppose, but FWIW never OPEN (abberation limitations of the lens) and never over f8 (diffraction effects will take the 'wow'-factor out of the HD)

Bill Ravens · January 29th, 2007, 08:14 AM

even f/8 is a bit soft. for me f/4-f/5.6

Mark Silva · January 29th, 2007, 11:24 AM

Quote:

Originally Posted by Werner Wesp

It's all a bit dependant on taste, I suppose, but FWIW never OPEN (abberation limitations of the lens) and never over f8 (diffraction effects will take the 'wow'-factor out of the HD)

All the way open creates "white shading" where the upper 1/3 of the screen has a magenta cast.

I wish they would fix that in the firmware.

John Vincent · January 29th, 2007, 01:23 PM

Quote:

Originally Posted by Mark Silva

All the way open creates "white shading" where the upper 1/3 of the screen has a magenta cast.

I wish they would fix that in the firmware.

I was under the impression that it was the lens, esp when wide open, that caused this...

Is this not so? Anyone with a wide angle lens out there having this happen?

john
evilgeniusentertainment.com

William Dunn · January 29th, 2007, 02:51 PM

I read in one of Mr. Carl Hick' posts (JVC rep) that the white shading has been fixed in the 200 series. I was on the verge of buying the HD 110, and this has put me off it as I was starting a new film which features much long lens shots of the outdoors. Now skys are generally blue, but not all and not always purple!
Can JVC fix this with a firmwear upgrade which i'm sure owners would pay for?

Mark Silva · January 29th, 2007, 05:02 PM

Quote:

Originally Posted by John Vincent

I was under the impression that it was the lens, esp when wide open, that caused this...

Is this not so? Anyone with a wide angle lens out there having this happen?

john
evilgeniusentertainment.com

no, it happens when the iris is full open.

seems silly that it would do this. Full open should be possible with no excuses.

They should correct it.

Steve Oakley · January 29th, 2007, 06:45 PM

I've never seen the problem with the stock lens mounted, but I have had it with my canon 50mm 1.8 direct mount. I think its more about reflections between the CCD block, the back of the lens, and maybe something shiny in the lens mount area somewhere.

Steve Oakley

Mark Silva · January 30th, 2007, 06:26 PM

I only have the stock lens.

I see it everytime I open up all the way.

Gary Morris McBeath · January 30th, 2007, 09:46 PM

Me too. With the stock lens and the 17x as well. Have to close to at least f2.8, better at f4. Sure wish I knew what was causing this.

Gary

January 28th, 2007, 05:33 PM	#1
Brian Luce Inner Circle Join Date: Jan 2006 Posts: 2,290	Hd100's sweet spot? A lot of people say video cams often work best at 5.6. What are findings with the hd100?

January 29th, 2007, 06:41 AM	#7
Werner Wesp Major Player Join Date: Aug 2005 Location: Belgium Posts: 497	It's all a bit dependant on taste, I suppose, but FWIW never OPEN (abberation limitations of the lens) and never over f8 (diffraction effects will take the 'wow'-factor out of the HD) __________________ High-Definition Video Consultant - CEO of Delimex NV - http://www.delimex.be gear of choice : http://www.wespgear.com

January 29th, 2007, 02:51 PM	#11
William Dunn New Boot Join Date: Oct 2006 Location: Ottawa, Canada Posts: 9	cameraman I read in one of Mr. Carl Hick' posts (JVC rep) that the white shading has been fixed in the 200 series. I was on the verge of buying the HD 110, and this has put me off it as I was starting a new film which features much long lens shots of the outdoors. Now skys are generally blue, but not all and not always purple! Can JVC fix this with a firmwear upgrade which i'm sure owners would pay for?

January 28th, 2007, 07:06 PM	#2
Eric Darling Major Player Join Date: Jun 2006 Location: Savannah, GA Posts: 463	f4 - at least with the stock lens.

January 28th, 2007, 07:07 PM	#3
George David Regular Crew Join Date: Mar 2005 Location: Utah Posts: 150	Brian, great question. That was what I wanted to find out today. As we all know, wide angle with the stock lens just plain sucks in resolution compared to say an XLH1. So I wanted to find the sweet spot of the fuji 16x for myself. In short, I get the sharpest images @ f5.6 and the focus barrel @ 15 feet. At the longer end, the HD100's stock lens just shines (f2.8 to f8.0) except at full telephoto. This is all from my unscientific tests.

January 28th, 2007, 07:15 PM	#4
George David Regular Crew Join Date: Mar 2005 Location: Utah Posts: 150	Eric's answer may be a lot more accurate than mine. Eric, you live in Savannah? That's my 2nd favorite city (1st is Charleston). I used to live in S. Carolina!!! Now I'm stuck in the ice box capital of the west. But at least Sundance is here.

January 29th, 2007, 12:19 AM	#5
Steve Oakley Trustee Join Date: Apr 2006 Location: United States Posts: 1,158	2.8-4 at 5.6 there is generally too much DoF unless you want deep DoP once you go past 8, you start running into pinhole effects from the smaller apeture. I often flip the ND filter on, even when shooting inside to get back to 2.8 1/2 Steve Oakley

January 29th, 2007, 03:49 AM	#6
Marc Colemont Major Player Join Date: Nov 2005 Location: Belgium Posts: 695	Outdoors in the sun I add an ND .6 on top of the ND 2 of the camera to reach the f4.

January 29th, 2007, 08:14 AM	#8
Bill Ravens Join Date: Nov 2001 Location: santa fe, nm Posts: 3,264 Images: 10	even f/8 is a bit soft. for me f/4-f/5.6

January 29th, 2007, 06:45 PM	#13
Steve Oakley Trustee Join Date: Apr 2006 Location: United States Posts: 1,158	I've never seen the problem with the stock lens mounted, but I have had it with my canon 50mm 1.8 direct mount. I think its more about reflections between the CCD block, the back of the lens, and maybe something shiny in the lens mount area somewhere. Steve Oakley

January 30th, 2007, 06:26 PM	#14
Mark Silva Major Player Join Date: Apr 2006 Location: Pacific NW Posts: 431	I only have the stock lens. I see it everytime I open up all the way.

January 30th, 2007, 09:46 PM	#15
Gary Morris McBeath Regular Crew Join Date: Aug 2005 Location: Steilacoom Washington Posts: 72	Me too. With the stock lens and the 17x as well. Have to close to at least f2.8, better at f4. Sure wish I knew what was causing this. Gary