Fujinon 16x lens tight focus ring at DVinfo.net

Clay Morton · April 7th, 2009, 07:18 AM

I have a JVC HD100 with stock lens. Last year the focus ring became tight as a I got toward infinity. It still works, but its much looser at the the closer range. Someone told me I could ship it to JVC to repair it, but I think that would take too much time. Has anyone had this problem before?

Bill Ravens · April 7th, 2009, 07:33 AM

The 16x fujinon on my JVC HD110 has a plastic frony barrel. If I clamp a mattebox onto the front ring, it distorts enough to bind. It is necessary to have a metal ring screwed into the plastic barrel to mitigate distortions when using a mattebox.

Clay Morton · April 10th, 2009, 11:41 AM

I think you're right Bill. I looked at my lens barrel and it looks a little distorted. Do they make metal rings to fit over it or is this something you made?

-Clay

Bill Ravens · April 10th, 2009, 11:48 AM

buy one of those metal filter adapter rings to screw into the front of the plastic

Jack Walker · April 10th, 2009, 12:22 PM

Century makes a ring for the JVC 16x lens to stiffen the barrel when adding a century wide angle adapter:
CENTURY 82MM 100U RING - Schneider Optics

However, a UV filter (preferably one with a thicker edge to give more support) or an adapter ring as Bill suggests is cheaper.

April 7th, 2009, 07:18 AM	#1
Clay Morton New Boot Join Date: Dec 2007 Location: Louisville, KY Posts: 20	Fujinon 16x lens tight focus ring I have a JVC HD100 with stock lens. Last year the focus ring became tight as a I got toward infinity. It still works, but its much looser at the the closer range. Someone told me I could ship it to JVC to repair it, but I think that would take too much time. Has anyone had this problem before?

April 10th, 2009, 11:41 AM	#3
Clay Morton New Boot Join Date: Dec 2007 Location: Louisville, KY Posts: 20	Lens Barrel I think you're right Bill. I looked at my lens barrel and it looks a little distorted. Do they make metal rings to fit over it or is this something you made? -Clay

April 7th, 2009, 07:33 AM	#2
Bill Ravens Join Date: Nov 2001 Location: santa fe, nm Posts: 3,264 Images: 10	The 16x fujinon on my JVC HD110 has a plastic frony barrel. If I clamp a mattebox onto the front ring, it distorts enough to bind. It is necessary to have a metal ring screwed into the plastic barrel to mitigate distortions when using a mattebox.

April 10th, 2009, 11:48 AM	#4
Bill Ravens Join Date: Nov 2001 Location: santa fe, nm Posts: 3,264 Images: 10	buy one of those metal filter adapter rings to screw into the front of the plastic

April 10th, 2009, 12:22 PM	#5
Jack Walker Trustee Join Date: Jun 2006 Location: Burbank Posts: 1,811	Century makes a ring for the JVC 16x lens to stiffen the barrel when adding a century wide angle adapter: CENTURY 82MM 100U RING - Schneider Optics However, a UV filter (preferably one with a thicker edge to give more support) or an adapter ring as Bill suggests is cheaper.