Originally Posted by John Schuermann
NO (all caps on purpose).
Vertical is fine, horizontal lens shift will seriously affect your image geometry.
I was going to make a thread asking about this, but saw this one so I'll bump it for my question:
I vary my image size using both zooming, and for my widest images I need to use my Panamorph UH480 lens.
My issue is that it's very hard to get the projector centered so perfectly that it zooms out perfectly even to every image size.
So, in other words, I may have a perfectly centered 105" 16:9 image (my masking automatically changes per AR), but once I'm fully zoomed out to say, 116" wide, the image is a couple inches off to one side.
I was therefore thinking of employing a teeny bit of horizontal lens shift (JVC RS600 projector) to center my widest zoom settings. But it seems from John's reply above that I better make sure I have no horizontal lens shift at all when using the A-lens.
If I have this right, this suggests to me that if I'm going to employ any horizontal lens shifting in my other lens memories, I should probably center the image best for use with the A-lens, so no horizontal lens shift is required, and then program lens shift in for other zoomed settings. Does that make sense?
A related question: I'm also having trouble getting the image exactly centered on my A-lens AND getting it zooming out perfectly. Right now the projector seems to have the image hitting the back of the A-lens a bit off center. Is that ok? Is there much leeway as far as where the lens image can go through the A-lens?