Ray, I just used the GG and 50mm lens, no condenser lens used. It does get a tad darker on the edges, but not much.
My assembly is only 3.5 inches in diameter, so the motor has to be offset with a mounting plate.
-Les

Les.

Did you receive the DVD+R disk yet?

Yes Bob, Sorry, I meant to reply but I was sidetracked!
The footage looks great, there is really no grain or other artifacting going on. Good work!
Thanks again!
-Les


<<<-- Originally posted by Bob Hart : Les.

Did you receive the DVD+R disk yet? -->>>

Les, could you email me a link to your footage?

film AT bigsmile.com

Also, do you have any photos of your unit? That would be very helpful too.

Thanks!

Hey Les,

I wouldn't mind seeing that footage of yours. Can you link me up?

elrosten@yahoo.com

thanks

OK, link sent. Let me know what you think!

Looks great. I see no grain. And I'm sure the jitter will go away when the unit is mounted solidly to the camera.

This may have been mentioned a while back, but by oscillating a focus screen ( like from a 35mm or medium format camera) with a fresnel already "built-in" to the ground glass, you should be able to do away with all the condensor madness. The fresnel lines should be invisible because the screen is moving.

anyways... What's the noise level on your oscillator?

It seems like the fresnel type ground glasses are built with the rings relative to the center of light, so that it distributes the light across the plane. Rotating a fresnel with the axis being along the center of the rings would work, surely, but would oscillating it work without having some jittery unevenness? Does this make sense? Sorry if I've confused anyone.

Jesse,
I didn't use a condenser on that test. Did you notice?
-Les

Yes, Les, The vignette was quite obvious. I wasn't trying to imply that you WERE using a condenser. - Just thinking aloud about the possibility of oscillating a fresnel-type focus screen.

peace
jesse

Oscillating a one piece fresnel/GG
 

"This may have been mentioned a while back, but by oscillating a focus screen ( like from a 35mm or medium format camera) with a fresnel already "built-in" to the ground glass, you should be able to do away with all the condensor madness. The fresnel lines should be invisible because the screen is moving."

Unfortunately you cant do this without another problem showing up. If you do you'll find out that your hot spot has suddenly reappeared when the fresnel is put into motion.

This happens because the fresnel is focusing light roughly to one point. When you move the fresnel in any way your changing where that point is pointed as it relates to the CCD's. Bigger the motion worse the hot spot effect will be. Now IF you could get it to oscillate in a path that is extremely tight (I mean no more than 1 or 2mm) then it shouldnt cause any problems at all. But having such a small movement means you'll have to move it quite a bit faster in order for the grain of the GG to "disappear". This is exactly what Im currently attempting to do. I'll let you all know if it works.

<<<-- Originally posted by Les Dit : OK, link sent. Let me know what you think! -->>>

hi

can i see the footage as well. also has anything really come of the oscilating GG idea. im planning to shoot with and xl2 and some sort of homemade mini35 device with can ef lenses.


lilbowrabi@hotmail.com

<<<-- Originally posted by Les Dit : OK, link sent. Let me know what you think! -->>>

hi

can i see the footage as well. also has anything really come of the oscilating GG idea. im planning to shoot with and xl2 and some sort of homemade mini35 device with can ef lenses.


lilbowrabi@hotmail.com

Link sent.
-Les

I want to see!

oolsen1@ec.rr.com