RE: Noblex 135U problem and observation

["Xiong, Zonghou" <Zonghou.Xiong@xxxxxxxxxxxx>]

It could be the battery.  At low speed (below 1/15 s) the Noblex requires
more
battery power. When the battery is low, it may work on normal speed
including 
1/500 s, but it may behave erratically at low speed.

Although I used more shots by the Noblex than the Xpan, I found the Noblex
135U
lens did not appear to be as sharp as the Xpan 45 mm lens. This of course
isn't
fair comparison because the focal length of the 135U lens is only 29 mm,
plus the
scan by the Noblex on a curve film inevitably introduces errors (3D drum vs
2D
image plan of a lens).  I'm therefore considering the 30mm lens for the
Xpan.
Has anyone compared images by a 30mm Xpan lens with those of a 135U?

Zonghou Xiong

-----Original Message-----
From: M. Denis Hill [mailto:denis@xxxxxxxxxxx]
Sent: Monday, August 28, 2000 4:45 PM
To: Panoramic Mailing List
Subject: Noblex 135U problem and observation


Today, I encountered the first problem I've had with a Noblex that was not
my fault. After not using my 135U for several months, I attempted a 1S
exposure. The drum rotated erratically (inconsistent speed). I turned the
speed to 1/15 and experienced the same thing for several rotations.

I quickly loaded my XPan and continued shooting the sunset. On my return
home, I investigated further. The batteries checked out ok. More slow
exposures produced the same drum speed inconsistency. Then I switched to
fast speeds and cycled it a few times. No evidence of the problem. Switching
back to the slow range, the problem was gone.

With my Widelux 1500, I had to exercise the drum before shooting sessions. I
never experienced this with a Noblex!

The observation, by the way, is the markings on the lens. While exploring my
problem, I noticed that my lens is marked as a Docter. I wonder if this is
the lens supplier for all 135s? The little I know about Docter is that they
make excellent view camera lenses. Can anyone further illuminate? Does
Docter OEM the Noblar T for the 150s?

Denis

M. Denis Hill
Area 360 Communications
http://www.area360.com
360.678.8351

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