Has this happened to anyone? at DVinfo.net

Leo Mandy · July 24th, 2005, 10:03 PM

I have been using my own GG for a while now and never switched back to the old frosted GG. With my GG, I don't really have a sweet spot, I can move the camera away and to the GG and the image doesn't blur or go out of focus, but vignetting is present.
Well, I went back to the Frost GG for a test and I found something really weird - now I need a sweet spot. If the DV camera is not the right distance from the GG, it is out of focus - this is weird ! I wonder if it is because the GG I have originally spreads the light out more evenly and with a wider image, whereas the frosted GG has a much great hotspot and the image is smaller, therefore causing my mini DV to have the focus problems and need a sweet spot.
Any ideas?

Donnie Wagner · July 25th, 2005, 08:30 AM

the only thing I can think of is that you had your camera set on auto focus, and when you went back to the frosted GG, you switched to manual focus.

Leo Mandy · July 25th, 2005, 09:43 AM

No, it wasn't that. I am just guessing here about the amount of information to focus on. Not sure exactly what it is...

Quyen Le · July 25th, 2005, 10:19 AM

When I use auto focus, the wax glass is really easy to focus but the ground glass is a bit harder, just don't know why.

July 24th, 2005, 10:03 PM	#1
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	Has this happened to anyone? I have been using my own GG for a while now and never switched back to the old frosted GG. With my GG, I don't really have a sweet spot, I can move the camera away and to the GG and the image doesn't blur or go out of focus, but vignetting is present. Well, I went back to the Frost GG for a test and I found something really weird - now I need a sweet spot. If the DV camera is not the right distance from the GG, it is out of focus - this is weird ! I wonder if it is because the GG I have originally spreads the light out more evenly and with a wider image, whereas the frosted GG has a much great hotspot and the image is smaller, therefore causing my mini DV to have the focus problems and need a sweet spot. Any ideas?

July 25th, 2005, 08:30 AM	#2
Donnie Wagner Regular Crew Join Date: Dec 2004 Location: Pittsburgh, PA Posts: 135	the only thing I can think of is that you had your camera set on auto focus, and when you went back to the frosted GG, you switched to manual focus.

July 25th, 2005, 09:43 AM	#3
Leo Mandy Major Player Join Date: Dec 2004 Posts: 749	No, it wasn't that. I am just guessing here about the amount of information to focus on. Not sure exactly what it is...

July 25th, 2005, 10:19 AM	#4
Quyen Le Major Player Join Date: Jun 2005 Posts: 356	When I use auto focus, the wax glass is really easy to focus but the ground glass is a bit harder, just don't know why.