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Sony VX2100 / PD170 / PDX10 Companion
Topics also include Sony's TRV950, VX2000, PD150 & DSR250 family.


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Old May 24th, 2005, 04:26 PM   #1
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Zoom in/out PD170

Using PD 170 with wide angle lens. When zooming out the brightness will change, it is darker when I zoom out. Is this normal?

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Ted Yan is offline   Reply With Quote
Old May 24th, 2005, 04:30 PM   #2
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Actually it should be the other way around. When you zoom in (to the max telephoto setting) the lens' widest f-stop should be 2.4. When you zoom out (to the max wide setting) the lens' widest f-stop should be 1.6. This has to do with the way the lens is designed and is common to just about all camcorders.

Or maybe you're asking something else?
Boyd Ostroff is offline   Reply With Quote
Old May 24th, 2005, 04:44 PM   #3
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Boyd, I was just playing with the manual exposure and gain on my PD170 and VX2100 and yes you are right regarding the PD. I could never get it to open to f1.6 at telephoto even in manual mode. I guess this is just the way the PD works. However, on my VX. I don't have problem zooming in using f1.6 in manual mode.

Ray
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Old May 24th, 2005, 04:54 PM   #4
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I don't think so, but I suppose they might have made some major change with the VX-2100 (I have a VX-2000). See these threads for more info:

http://www.dvinfo.net/conf/showthread.php?t=37526
http://www.dvinfo.net/conf/showthread.php?t=9576
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