Spinning Ground Glass? at DVinfo.net

Ryan Arthur · March 19th, 2004, 11:16 PM

I know that the ground glass is described as spinning, but isn't it, in actuality, moving back and forth on the same axis? Is anyone familiar enough with the mechanism to clear this up for me?

Josh Brusin · March 19th, 2004, 11:26 PM

nope, the 300 series spins like a record, hence the vortex which is visible as you close the lense up... the 400 spins on an elliptical path eliminating that spot, although I assume it can create a big circle if you know where to look... haven't seen a 400 series yet.

Steve Cahill · March 21st, 2004, 06:36 AM

The 400 spins in a elliptical manner. You can see it when the camera is detached. I have not seen any type of artifact on the image regardng the spinnng I will try to capture ground glass spinning on video and post latter this week as media file.

See: http://stevecahill.home.comcast.net/mini35/min35.htm

for informaton about Nkon lens on min35.

Regards
Steve

March 19th, 2004, 11:16 PM	#1
Ryan Arthur Tourist Join Date: Mar 2004 Location: Greenville, MI Posts: 1	Spinning Ground Glass? I know that the ground glass is described as spinning, but isn't it, in actuality, moving back and forth on the same axis? Is anyone familiar enough with the mechanism to clear this up for me?

March 21st, 2004, 06:36 AM	#3
Steve Cahill Major Player Join Date: Dec 2003 Location: Boston, MA Posts: 321	Spinning The 400 spins in a elliptical manner. You can see it when the camera is detached. I have not seen any type of artifact on the image regardng the spinnng I will try to capture ground glass spinning on video and post latter this week as media file. See: http://stevecahill.home.comcast.net/mini35/min35.htm for informaton about Nkon lens on min35. Regards Steve

March 19th, 2004, 11:26 PM	#2
Josh Brusin Major Player Join Date: Nov 2003 Location: Chicago, IL Posts: 439	nope, the 300 series spins like a record, hence the vortex which is visible as you close the lense up... the 400 spins on an elliptical path eliminating that spot, although I assume it can create a big circle if you know where to look... haven't seen a 400 series yet.