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Posted by Steve Wills on 10/06/34 11:27
Also, the only adjustment available on this lens is the iris gain to control
the speed of the iris opening and closing.
It has no other "trim-pots" to adjust in the front...
On 9/22/05 10:18 AM, in article BF58355D.12933%steventv@insightbb.com,
"Steve Wills" <steventv@insightbb.com> wrote:
>
>
> I have a Canon YH18x6.7KSR lens on my GY-DV 500 camera (love it), but, it¹s
> picture is always too hot in auto iris.
>
> Do you know if the auto iris on the lens can be mechanically changed (other
> than manually) to stop down to a acceptable level?
>
> Even with setting the camera to factory defaults, it is still hot, so I
> think it must be in the lens. Canon checked the lens
> and said it is working fine, but gave no hint as to how to keep the auto
> iris from being too hot. They didn¹t even answer my question about it which
> is why I sent it to them in the first place.
>
> Is there any ³mechanical adjustment² I can do to the lens to make the auto
> iris stop where I want it *in auto*, instead of the
> lens making the ³default adjustment² and the picture being too hot?
>
> I¹ve contacted JVC and he told me, other than the backlight adjustment, the
> camera couldn¹t be set any other way.
>
> This cameras picture is running way hot (about 3 f stops sometimes) and it
> was just serviced and checked at JVC.
>
> Others have had the same problem but I don¹t know what they did to correct
> this. I¹m figuring there must be a mechanical ³set-screw² or
> "trim-pot" that determines where the auto iris stops under different
> lighting conditions. It¹s very consistent, but just over-exposed in auto.
>
> Do you have any suggestions?
>
> Thanks for the help.
>
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