Film-Tech Forum ARCHIVE: How does the Sony handle lens shift?

This is topic How does the Sony handle lens shift? in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Alan Gouger (Member # 543) on 01-06-2013, 11:20 PM:

I was told the Sony's do not have lens shift. I would think this is a must when zooming between different ratios. Is this correct and if so what is the work around. Thx.

Posted by Bajsic Bojan (Member # 4928) on 01-07-2013, 01:20 AM:

From the brochure:

Lens Shift Function
The SRX-R320 is equipped with a lens shift function that
allows projected images to be moved up and down or
from side to side. This lens shift function can be operated
manually via the finger screws incorporated on the
projector’s unit. Using this function, the position of the
projected images can be moved vertically by -50% to +50%
and horizontally by -5% to +5%.

---

The 515 however has this:
V shift +/- 35%
H shift +/- 7%
with "lens shift block"

What that means is anyones guess.

Posted by Carsten Kurz (Member # 5396) on 01-07-2013, 10:38 AM:

quote: Alan Gouger
I was told the Sony's do not have lens shift.

You were probably told so by someone endorsing DLP projectors ;-)

- Carsten

Posted by Alan Gouger (Member # 543) on 01-07-2013, 11:24 AM:

quote:
You were probably told so by someone endorsing DLP projectors ;-)

Thanks for the correction guys.
Maybe they meant it is not avail as a macro due to it requiring manual operation.

Posted by Marco Giustini (Member # 4544) on 01-07-2013, 12:29 PM:

As said, it's manual. Hence, when setting up the picture, you need to move the scope picture electronically. If the electronic shift is not enough - because the projector is too far away from the centre axis - you need, unfortunately, to rake the machine. On a DLP you can use the lens shift before starting to move the machine.
Not a big deal though. And SONY's lenses have a quite good focus depth - thankfully, since there is no boresight/scheimpflugh.

Posted by Alan Gouger (Member # 543) on 01-07-2013, 02:47 PM:

Im taking from what has been said the focus and zoom are motorized?

Posted by Paul Mayer (Member # 355) on 01-07-2013, 03:35 PM:

On the 2D lenses, yes. On the 3D RealD XLS lenses, they're all manual too.

Posted by Carsten Kurz (Member # 5396) on 01-07-2013, 06:17 PM:

Which is not a problem due to the way Sony handles the 3D image remapping.

- Carsten

Posted by Marco Giustini (Member # 4544) on 01-08-2013, 03:59 PM:

Yes, you never touch focus and zoom on a 3D lens. The picture is scaled inside, focus and zoom are set during the installation.