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September 6th, 2003, 09:20 AM | #1 |
Wrangler
Join Date: Dec 2002
Location: Mays Landing, NJ
Posts: 11,797
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Digital Zoom and telephoto adaptors
I never took much stock in the digital zoom feature before, but last night I was taking some shots of the moon with my PDX-10 using a Sony VCL-HG2037X 2x telephoto adaptor. Just for fun I switched on the 24x digital zoom. The results were surprisingly good! I guess the high res CCD's are able to pull this off much better than I had expected. Individual craters are visible, and the moon disc doesn't even completely fit vertically in the 16:9 frame.
I haven't had a chance to shoot a resolution chart this way, but subjectively it looks nice. Just thought it was worth mentioning since it's a feature that many of us don't bother to check out. If there's any interest I can post some example frames. FWIW, the HG2037X gives really nice results but it's pricey. When I first got it I nearly returned the lens. It didn't appear to focus properly. But after experimenting I learned that setting the camera for infinity doesn't work through the adaptor lens. Using manual focus you can get a razor sharp image however. The autofocus seems to work under some situations, but I get the best results by focussing manually. There are no filter threads on the lens unfortunately. But putting ND filters between the adaptor and camera lens seems to work fine. |
September 13th, 2003, 10:28 PM | #2 |
New Boot
Join Date: Aug 2003
Location: Switzerland
Posts: 12
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digital zoom / Gain max.
Hi !
I am now travelling abroad with a PDX10 and had some preety rough situations, especially concerning low light situations. At first I decided to set the gain max. at 6dB (in the Custom preset menu) in order to avoid too much noise in the picture in case of low light. But then I had a try shifting the gain manually to 18dB and I was actually quite surprised by the sharpness the picture still displays. I was wondering if the Megapixel CCD quality is playing a significant role here, just as it seems to do in your Telephoto / digital zoom story. I do not have precise control facilities with me at the moment, I did not have the opportunity to export a still frame and enlage it on a computer, nor to shoot a chart. But simply by trying to view the picture on the LCD switching the PB zoom, it seems quite blowing... Have a try, I would be interested what you think about it. Cheers, JDB |
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