I have the AE3000U projector ceiling mounted and therefore need to use vertical lens shift (only). I project on a 4:3 screen.

I saved 2 zoom settings in lens memory for 16:9 and 4:3 format so that the image width is constant for both formats, and the image height is taller for the 4:3 format.

The image was always centered on the screen when switching between 4:3 and 16:9. That is anyway how it was with my first AE3000U projector...

I now have a replacement projector and am not able to achieve the same results; the 16:9 image is now at the top of the screen. The only way to bring it to the center is to change the mechanical lens shift when switching to 16:9.

What am I doing different with my second projector..? Why can I no longer keep the image in the center w/o changing the lens shift ?


p.s. Sorry for starting a new thread on this, but I got no answer in the Official Panasonic thread.

Could someone with an AE3000U maybe help?

For example, when you zoom (ceiling mounted projector), does the center of the image move?

There are two ways to move the image: manually and digitally. First, center your image manually in your usual position. Name it. Save it.Then when you chose a different aspect ratio or lens position make the changes digitally in the lens menu.Adjust your vertical "V" placement and your horizontal "H" placement and save in your lens memory(with a different name). Remember to let the projector warm up before you save your functions (including focus)


PM me if you are still confused.

thanks

thanks

Yes,thanks again

For example, when you zoom (ceiling mounted projector), does the center of the image move?

Independent of projector, when you zoom a lens which has been shifted, the center of the image moves with the zooming.
Any ceiling mounted projector which projects a rectangle has had its lens shifted. Your suspicion is correct: when you zoom such a ceiling mounted projector the center of the image moves.
If your lens is shifted, and you want to zoom and to keep the image center fixed, you must reshift the lens in proportion with the focal length change made by the zooming.

Independent of projector, when you zoom a lens which has been shifted, the center of the image moves with the zooming.
Any ceiling mounted projector which projects a rectangle has had its lens shifted. Your suspicion is correct: when you zoom such a ceiling mounted projector the center of the image moves.
If your lens is shifted, and you want to zoom and to keep the image center fixed, you must reshift the lens in proportion with the focal length change made by the zooming.

That means that the lens memory function is not very useful in this situation. I would need to manually change the lens-shift every time I change between 16:9 and 4:3 format :(.

Very strange that I didnt need to do this with my first AE3000U; only the second one :confused::confused:

According to Bujee1, the lens shifting can be digital as well as manual. Why can't your lens memory include both the zoom data and the shift data?

(Incidentally, my NEC projector has no lens shift. I'm of the optical opinion that lenses which allow shift are of inferior sharpness, and that the pixel sacrifice with NEC 3D-reform may be less of loss.)

According to Bujee1, the lens shifting can be digital as well as manual. Why can't your lens memory include both the zoom data and the shift data?


Because when you shift digitally, you simply shift the image within the projector picture frame. Thus, I will loose part of the image.

This is only useful when I have black bars on top/bottom (e.g. when projecting 2.35 format in the native 16:9 frame)

Thank you, I don't know your projector and assumed Bujee1 referred to digitally controlled motorized lens shift.
Back to the original mystery. Is it possible that you didn't use the lens shift with your first projector but rather the digital keystone correction? Then zooming would preserve centration.

Thank you, I don't know your projector and assumed Bujee1 referred to digitally controlled motorized lens shift.
Back to the original mystery. Is it possible that you didn't use the lens shift with your first projector but rather the digital keystone correction? Then zooming would preserve centration.


It is correct that I could angle the projector+keystone instead of lens-shift, and this would eliminate the issue. However, the angle and amount of keystone required was too high to be practical and would have caused other image quality issues. Thus, I preferred to use lens shift instead (on both projectors) .

This is a big mystery. I wonder if there could have been some kind of design change between the two projectors. Wish that I had the first projector still here.....