CCD Shifted?

waefre

waefre

Well-known member
Ok so I got my LEX in today and I must say it's beautiful. I am a bit concerned though as when I screwed it on the screen was not centered. I remember reading something about ccd shift or some such thing with the HVX but couldn't find the thread. So is there are problem here or is this par for the course?

1194455874.jpg
 
Yeah, that's pretty much the problem with the HVX (my HVX isn't as off as yours, but it's still not centered). BUT... it isn't really a problem. You just have to zoom in closer on the GG until the image is clean (no black lines). I always go a step past this point in the zoom just to be safe. The good thing is the Letus Extremes grain is so small that there really isn't a noticable difference when you have to zoom in.
 
DCP said:
Yeah, that's pretty much the problem with the HVX (my HVX isn't as off as yours, but it's still not centered). BUT... it isn't really a problem. You just have to zoom in closer on the GG until the image is clean (no black lines).
Click to expand...


But then by zooming in that much, are your focal lengths still accurate (meaning are you still seeing the equivalent of a 35mm lens FOV)?
And if this is a problem with the HVX - is this an issue with all adapters on the HVX?

Just curious.
 
I remember reading some people had sent there's back. I got mine in May so I should be covered. If anyone has done it and has contacts I'd appreciate it. oddly if I turn the adapter upside down its almost perfectly centered.
 
is there any way the Letus can possibly be mounted upside down?

The support bracket only mounts from the bottom correct? If so, perhaps they could offer an additional bracket that would make it possible?
 
waefre

The short version is that there seems to be a wide degree of variation on how accurately the CCD block is mounted in HVX cameras. Some folks have called panasonic support (warranty or not) and asked to have the CCD block calibrated.

Don't know if it cost extra $$ or not.

Brian
 
bvalente said:
The short version is that there seems to be a wide degree of variation on how accurately the CCD block is mounted in HVX cameras.
Click to expand...

Wow.
So I guess this is an issue that might affect every adapter (with the HVX that is).

I wonder what affect that has on the HVX image itself?
 
Yeah - it was a bit of a bruhaha for a while. Those that are a little off center just means you need to zoom in more. Those that are a lot off center run into larger issues or may opt for the recalibrate.


Brian
 
Yeah. Brian is right. This is something the Dennis had noted as well. There appears to be a fairly wide degree of variance from HVX to HVX. Does the Letus let you adjust the centering like the Brevis does? If so, you really only need to worry about the left to right center since you are 16:9. The top and bottom will go off before the left and right edges, so you don't need to worry about them as much.

If the letus lets you adjust, then just adjust it some. I was able to get mine perfectly centered.

Also, it's my understanding that the Letus also uses a larger viewing frame, so if you are wanting 35mm movie frame size, you will have to zoom in quite a bit more anyways, and that won't be an issue with the 35mm movie frame size. If you are trying to use the "Vistavision" frame size, or SLR, then it might be an issue if you can't adjust the center of the Letus.

later,
Jason
 
I had this problem with mine here in Canada. Panasonic Canada were not to helpful when talking about this problem when we returned the camera for check up.

They said :

"it should be noted, that all the camera parts are design with a certain amount of tolerance, when the CCD is glued to the prism block this tolerance also come into play."

"Note: I have also tested and compare the camera in question with other cameras with different dates of manufacturer, only a small percentage does not exhibit similar flaw when the filter (35mm adapter) in question is attached to them." Chris Robinson, assistant manager, Panasonic Canada.

So, you have to zoom in a little more to get an image without vignetting.
 
Jason Ramsey said:
Does the Letus let you adjust the centering like the Brevis does? If so, you really only need to worry about the left to right center since you are 16:9. The top and bottom will go off before the left and right edges, so you don't need to worry about them as much.
Click to expand...


So the Brevis allows you to adjust the centering of the adapter?
Is that what the "micro collimation system" they talk about refers to?

I never really did understand what that was all about.
 
The Micro Collimation is what lets you adjust the distance of the lens mount to the ground glass, so your focus marks on the lens will match up, etc. (if it is off). It's useful if you are using multiple lens mounts in particular... Anyways.

That's something different. Yes. The Brevis lets you adjust the left/right and up/down alignment so you can get it centered if need be. Not tons, but enough in most cases. I didn't know if the Letus did that or not.

With the HVX is a useful feature.

Later,
Jason
 
Gotcha - thanks for the clear explanation, Jason.
:thumbsup:

So... does anyone know if other adapters let you adjust the centering of the adapter that way?
 
same issue with HV20 and Letus Extreme. You can adjust it a bit, but I'd love not having to zoom in so much because of the offset.



Regards
 
yeah that adjustment on the Brevis has been a life saver. Especially when you get rentals and stuff. How do you know if you hit a 35mm frame size?
 
Beat:

Put a 50mm lens on the adapter. Position the camera 2' from a wall. Tape a piece of 8/12" x 11" paper (landscape orientation) on the wall away from the cam. Ensure the focus is set to 2' on the lens. Now zoom in until you just crop the vertical edges of the paper. Voila - 35mm film camera frame size.
 
taormina said:
Beat:

Put a 50mm lens on the adapter. Position the camera 2' from a wall. Tape a piece of 8/12" x 11" paper (landscape orientation) on the wall away from the cam. Ensure the focus is set to 2' on the lens. Now zoom in until you just crop the vertical edges of the paper. Voila - 35mm film camera frame size.
Click to expand...

So would that be 2' from the GG or the front of the lens?
 
You must log in or register to reply here.
Back
Top