Optical question...

Marc Potvin · December 2nd, 2002, 11:44 AM

I have no filter on the lens. I've noticed that, generaly, all pictures where there is a bright background have the same effect. It is as if the white light from the bright background pours over the darker areas. Since the white light is broken down into different wave lenghts (as with a prizm), it results in colored contours for dark objects against bright white backgrounds.

Marc.

Jeff Donald · December 2nd, 2002, 01:30 PM

What is it like if the subject is not so back lit? I would be talking to Sony. Your footage is basically unuseable for any type of nature/wildlife work. If sony agrees to look at the camera send your tape along so that they can see the type of problems your having. Good luck.

Jeff

Dick Walton · December 2nd, 2002, 04:33 PM

Although I can't offer technical advice I can share some experiences shooting birds. I spend a good deal of time video taping birds throughout North America. My first cam was a Hi8 and although it forced me to improve my tracking skills it left a lot to be desired as a bird cam. Graduating to a Sony VX 1000 was a bit of an improvement but its "short" lens meant that I needed a tele-converter and I made the mistake of buying a cheap one. Ultimately I bought a Century Precision Optics 2X tele-converter that allowed me to take some fairly good shots. A real break through came when I bought a GL1. This is a great camera and with its 20X Optical Zoom (a wonderful lens) and Century tele-converter I really began to make some progress. I now shoot mainly with an XL1s and a Tamron 80-300mm lens. It's much easier to get get footage with this set-up and often without disturbing the bird. Good birding!!

Robert J. Wolff · December 8th, 2002, 06:58 PM

Spectral defraction, is my guess.

Your at about my Latitude, mine being in the Adirondack Mountains of NY state. And, therefore, I suggest it is caused by the low angle of the sun to the horizon.

I particuarly note it in winter, when there is a great deal of reflective light. In particular, when using a +1, or, +2 barlow.

In general, a reposition of the camera seems to be the answer; or, fill light.

Andre De Clercq · December 9th, 2002, 01:20 PM

Robert, what do you mean by spectral diffraction?

December 2nd, 2002, 04:33 PM	#18
Dick Walton Regular Crew Join Date: Jan 2002 Location: Concord, MA Posts: 53	"bird" camera Although I can't offer technical advice I can share some experiences shooting birds. I spend a good deal of time video taping birds throughout North America. My first cam was a Hi8 and although it forced me to improve my tracking skills it left a lot to be desired as a bird cam. Graduating to a Sony VX 1000 was a bit of an improvement but its "short" lens meant that I needed a tele-converter and I made the mistake of buying a cheap one. Ultimately I bought a Century Precision Optics 2X tele-converter that allowed me to take some fairly good shots. A real break through came when I bought a GL1. This is a great camera and with its 20X Optical Zoom (a wonderful lens) and Century tele-converter I really began to make some progress. I now shoot mainly with an XL1s and a Tamron 80-300mm lens. It's much easier to get get footage with this set-up and often without disturbing the bird. Good birding!! __________________ D.Walton

December 8th, 2002, 06:58 PM	#19
Robert J. Wolff Major Player Join Date: Sep 2001 Location: Adirondacks of New York Posts: 210	Spectral defraction, is my guess. Your at about my Latitude, mine being in the Adirondack Mountains of NY state. And, therefore, I suggest it is caused by the low angle of the sun to the horizon. I particuarly note it in winter, when there is a great deal of reflective light. In particular, when using a +1, or, +2 barlow. In general, a reposition of the camera seems to be the answer; or, fill light. __________________ Himself

December 2nd, 2002, 11:44 AM	#16
Marc Potvin New Boot Join Date: Nov 2002 Location: Ottawa, Ontario Posts: 11	I have no filter on the lens. I've noticed that, generaly, all pictures where there is a bright background have the same effect. It is as if the white light from the bright background pours over the darker areas. Since the white light is broken down into different wave lenghts (as with a prizm), it results in colored contours for dark objects against bright white backgrounds. Marc.

December 2nd, 2002, 01:30 PM	#17
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	What is it like if the subject is not so back lit? I would be talking to Sony. Your footage is basically unuseable for any type of nature/wildlife work. If sony agrees to look at the camera send your tape along so that they can see the type of problems your having. Good luck. Jeff

December 9th, 2002, 01:20 PM	#20
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	Robert, what do you mean by spectral diffraction?