On 14 Mar 2004 at 7:39, Dr. Shaun Canning wrote: > Hi guys, > > Anyone willing too take part in a little experiment with your *ist D? I know how > you guys all love comparing lenses and gear from time to time, so hopefully a > few of you might help me out.
For anyone who missed my post last month its posted again below. A few *ist D owners sent me results, maybe you would like to add yours then I'll have enogh data to post a page of results. ------- Forwarded message follows ------- Date forwarded: Mon, 9 Feb 2004 21:36:41 -0500 From: "Rob Studdert" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Date sent: Tue, 10 Feb 2004 13:36:36 +1000 Subject: *ist D sensor noise survey Hey it's a while since we had a survey... I'm interested in making an informal survey of the noise performance of our *ist D cameras. Anyone with access to a PC who has permission to run the little test app at http://www.starzen.com/imaging/deadpixeltest.htm can participate. One exposure is all that's required for the test however in order to achieve consistency we need to make sure that each camera is set up the same. I propose that the test shot should be made as follows: 10 seconds manual exposure (lens capped) 200ISO Daylight WB NR off Saturation setting (middle) Sharpness setting (left most) Contrast setting (left most) sRGB CS TIFF L file The tiff file can then be opened and tested under the default settings of the DeadPixelTest application and the information file saved. I ran the procedure above and the results were as follows: [DeadPixelText] Version=1.0 Description= FileType=TIFF NumBadPixels=15 0=Hot,2798,135,69 1=Hot,1954,339,113 2=Hot,1809,585,64 3=Hot,726,610,112 4=Hot,726,611,192 5=Hot,726,612,112 6=Hot,2312,753,121 7=Hot,323,766,94 8=Hot,572,1365,116 9=Hot,1627,1400,64 10=Hot,2163,1958,96 11=Hot,2162,1959,113 12=Hot,2163,1959,145 13=Hot,2164,1959,112 14=Hot,2163,1960,98 The first two numbers is the pixel location and the last number is the heat, 0 being off and 255 being full on. So I have one pixel that's 3/4 on at 10 seconds. If anyone would like to mail me their results I'll collate and publish the data later down the track (I'll keep data sources anonymous if requested). Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998 ------- End of forwarded message -------
