Now worries Walt (I've posted these before.): <http://farm3.static.flickr.com/2209/2258045616_6bbe97702c_o.jpg> K10D, DA* 16-50mm f2.8 @ 16mm, 1208 seconds (~20min) @ f4, ISO 100
<http://farm3.static.flickr.com/2119/2481946623_1e672bebcc_o.jpg> K10D, DA* 16-50mm f2.8 @ 16mm, 969 seconds (~16min) @ f4, ISO 100 Now these have been photoshoped to remove 2 sensor heat blooms inherent to the K10D & miscellaneous noise. For the heat blooms I use a dark frame that I have on file (ie 15 min exposure made with the lens cap on) & I use it overlayed on the base exposure & change it's blending mode to Difference to clean up the majority of the bloom (sometimes I use 1 or 2 of these layers). The rest is done using the clone, heal & patch tools. Here is a full sized version of the second shot BP (Before Photoshop :-) (~900kb): <http://www.arach.net.au/~savage/Misc/Images/K10D/_IGP1494.jpg> These were taken in very dark conditions. It's about 3-4 hours north of the city & the only illumination that night was from the stars (and gelled flashes). I'm not surprised about the troubles you are having at high ISO. These sensors heat up quick. If you want to try again, use the inbuilt multiple exposure feature with EV compensation turned off. Instead of taking 1x 3 min exposure take 9x 20 second exposures. I suspect though that the heat will still be an issue. What I do to guesstimate exposure is take a 30 second - 2 min exposure (or more, until the lighting looks good) @ ISO 1600 and work backwards from there to determine the exposure for ISO 100. Cheers, Dave 2008/7/1 Walter Hamler <[EMAIL PROTECTED]>: > David, could you post a sample of a 10 minute exposure with the K10? > I have tried some shots around 3 minutes with mine, NR on, and they > are almost totally red. This is at iso 1600. 800 is only marginally > better. And they were in a reasonably dark site, mag 6+ skies. > > Walt > > On 7/1/08, David Savage <[EMAIL PROTECTED]> wrote: >> I don't deny that the K20D high ISO is less noisy than the K10D. I use >> ISO 3200 & 6400 often. I haven't investigated the various high ISO NR >> settings. I just set it to weak & left it when I first got the camera. >> >> However I do shoot a quite a few of long exposures 10+ minutes, & the >> inability to turn off long exposure NR, keeps me carrying the K10D on >> night shoots. >> >> Cheers, >> >> Dave -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
