Anyone use the new Brevis CFXL EX-1 fix? at DVinfo.net

Benjamin Eckstein · September 1st, 2008, 08:39 AM

I got mine last week and don't feel that it is 100%. Wondering if anyone else has gotten theirs yet. I know I am one of the few who EX-1 adapter users not using a Letus (although I have been using a friend's Extreme the last 8 months while waiting for Brevis fix). Anyways, the long-awaited, magical diffuser is out and I seem to get some substantial amount of vignetting in anything but the most optimally lit environments.

Just want to hear some other people's feedback if they have used it yet.

BE

Paul Joy · November 4th, 2008, 07:17 AM

Same problems here Benjamin, did you ever find a solution?

The only time I can shoot without the sides being dark is in very bright conditions, anything in low light or even dull outdoor lighting suffers badly. I know my nikon lens isn't the problem as I can zoom out and see the image it's projecting onto the brevis is perfect, the issue seems to be when the EX1 zooms up to the element.

Dan Chung · November 4th, 2008, 10:47 AM

Same issue here too, I have the fix but not the flip module. I thought it was just my setup

Dan

Paul Joy · November 4th, 2008, 12:44 PM

Have you guys informed Cinevate of your problems? It might help them to resolve it if they get more feedback.

Jay Gladwell · November 4th, 2008, 04:08 PM

Forgive me, but I can't help it.

I could not own anything with the name Brevis. Why? Because every time I see this I expect to it followed by "Butt-head."

Brevis and Butt-head.

Sorry, I am forever scarred.

Benjamin Eckstein · November 10th, 2008, 08:09 AM

info moved. I will try to post pics later today, but the results are typical of what Paul has found.

Paul Joy · November 10th, 2008, 07:54 PM

Quote:

Originally Posted by Benjamin Eckstein

info moved. I will try to post pics later today, but the results are typical of what Paul has found.

Thanks Benjamin. Just to keep this thread for this issue I'll post my situation here instead of bogging down Phils thread.

Cinevate understand that there is a problem with light fall-off, but they blame it on the EX1's lens. the cfXL was designed to correct edge-edge sharpness issues alone, and the closest it comes to doing that is at z70. The trouble is you need to zoom in a lot more to get past the light fall off and in the process the edge-edge sharpness is lost too. Unfortunately this in not made very clear in their advertising, which states "Designed to address the Sony EX1 optical issues" and "the sharpest edge to edge EX1 solution in existence".

From various tests I've carried out it seems the image projected onto the brevis by the 50mm lens is fine, this can be seen by zooming out and recording some footage at around z60 - z65. Once you zoom up the frame however the light fall off appears. This light fall off is not present in the EX1 without the Brevis though so it definitely has something to do with the light path through both.

Here's some examples of how the light fall off looks on my camera. Excuse the terrible images, I really wasn't thinking about what I was pointing the camera at!

http://www.olikai.com/forum_images/brevis/z60.jpg
http://www.olikai.com/forum_images/brevis/z65.jpg
http://www.olikai.com/forum_images/brevis/z70.jpg
http://www.olikai.com/forum_images/brevis/z75.jpg
http://www.olikai.com/forum_images/brevis/z80.jpg
http://www.olikai.com/forum_images/brevis/z85.jpg

September 1st, 2008, 08:39 AM	#1
Benjamin Eckstein Major Player Join Date: Jan 2007 Location: Boston, Massachusetts Posts: 380 Images: 1	Anyone use the new Brevis CFXL EX-1 fix? I got mine last week and don't feel that it is 100%. Wondering if anyone else has gotten theirs yet. I know I am one of the few who EX-1 adapter users not using a Letus (although I have been using a friend's Extreme the last 8 months while waiting for Brevis fix). Anyways, the long-awaited, magical diffuser is out and I seem to get some substantial amount of vignetting in anything but the most optimally lit environments. Just want to hear some other people's feedback if they have used it yet. BE

November 4th, 2008, 07:17 AM	#2
Paul Joy Major Player Join Date: Mar 2007 Location: Norfolk, UK Posts: 627	Same problems here Benjamin, did you ever find a solution? The only time I can shoot without the sides being dark is in very bright conditions, anything in low light or even dull outdoor lighting suffers badly. I know my nikon lens isn't the problem as I can zoom out and see the image it's projecting onto the brevis is perfect, the issue seems to be when the EX1 zooms up to the element. __________________ Blog: www.pauljoy.com Company: www.videotrader.co.uk

November 4th, 2008, 12:44 PM	#4
Paul Joy Major Player Join Date: Mar 2007 Location: Norfolk, UK Posts: 627	Have you guys informed Cinevate of your problems? It might help them to resolve it if they get more feedback. __________________ Blog: www.pauljoy.com Company: www.videotrader.co.uk Last edited by Paul Joy; November 4th, 2008 at 03:07 PM.

November 4th, 2008, 10:47 AM	#3
Dan Chung Major Player Join Date: Apr 2008 Location: Beijing Posts: 665	Same issue here too, I have the fix but not the flip module. I thought it was just my setup Dan

November 4th, 2008, 04:08 PM	#5
Jay Gladwell Join Date: Jul 2002 Posts: 1,244	Forgive me, but I can't help it. I could not own anything with the name Brevis. Why? Because every time I see this I expect to it followed by "Butt-head." Brevis and Butt-head. Sorry, I am forever scarred.

November 10th, 2008, 08:09 AM	#6
Benjamin Eckstein Major Player Join Date: Jan 2007 Location: Boston, Massachusetts Posts: 380 Images: 1	info moved. I will try to post pics later today, but the results are typical of what Paul has found.