Filter For Stock Lens Ca? at DVinfo.net

Ralph Sturgess · December 19th, 2006, 08:29 PM

Is there any screw on filter one can apply to the stock lens in order to limit that annoying purple green chromatic abberation that so often happens with the stock lens for the hd100?

Diogo Athouguia · December 21st, 2006, 01:43 PM

Just avoid using the iris fully opened. If you apply a filter you lose light anyway...

Chris Rentzel · December 21st, 2006, 02:12 PM

Quote:

Originally Posted by Diogo Athouguia

Just avoid using the iris fully opened. If you apply a filter you lose light anyway...

Hi Diogo,

Is there a "sweet spot" iris setting in your opinion? I'm a newbie. Thanks.

Diogo Athouguia · December 21st, 2006, 02:22 PM

Quote:

Originally Posted by Chris Rentzel

Hi Diogo,

Is there a "sweet spot" iris setting in your opinion? I'm a newbie. Thanks.

Somewere between fully opened and f2. Just point to a white wall on a low light room and close the iris until you find that spot. You can make the CA almost disapear without losing much light.

Bill Ravens · December 21st, 2006, 02:40 PM

CA on the 16x5.5 fujinon lens is a function, mostly, of zoom position. CA is worst when zoomed fully in. While stopping down may mitigate the CA problem, it won't eliminate it at full zoom. I've just learned not to use that last bit of zoom. No filter, short of a magical one, can make optics better than they were designed. There's a plugin available for VirtualDub that helps with the CA problem, but, it's use is somewhat problemattic.

December 19th, 2006, 08:29 PM	#1
Ralph Sturgess Regular Crew Join Date: May 2006 Location: Michigan Posts: 35	Filter For Stock Lens Ca? Is there any screw on filter one can apply to the stock lens in order to limit that annoying purple green chromatic abberation that so often happens with the stock lens for the hd100?

December 21st, 2006, 01:43 PM	#2
Diogo Athouguia Major Player Join Date: May 2005 Location: Portugal Posts: 282	Just avoid using the iris fully opened. If you apply a filter you lose light anyway...

December 21st, 2006, 02:40 PM	#5
Bill Ravens Join Date: Nov 2001 Location: santa fe, nm Posts: 3,264 Images: 10	CA on the 16x5.5 fujinon lens is a function, mostly, of zoom position. CA is worst when zoomed fully in. While stopping down may mitigate the CA problem, it won't eliminate it at full zoom. I've just learned not to use that last bit of zoom. No filter, short of a magical one, can make optics better than they were designed. There's a plugin available for VirtualDub that helps with the CA problem, but, it's use is somewhat problemattic.