Archived posting to the Leica Users Group, 2010/08/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks for the reevaluation Dick. Clears my aging mind. You had me questioning my eye for digital artifacts whether simple noise, chromatic aberrations or other digi-things exaggerated by over sharpening, enhancing contrast, etc. I went out on an unsuccessful search re: "atmospheric refraction" to find anything remotely resembling what I saw in the photo. Regards, George Lottermoser george at imagist.com http://www.imagist.com http://www.imagist.com/blog http://www.linkedin.com/in/imagist On Aug 10, 2010, at 8:43 AM, Richard Taylor wrote: > George - I spoke too quickly yesterday. You are right, the grain is good, > old-fashioned, detector noise. There are refraction effects in this > picture, you can see it in the slightly wavy lines of the distant > buildings and boats, but that is not the cause of that grain. > > It's as bad as it is because I built contrast significantly to make the > picture more interesting. That really aggravated the quite-low ISO 400 > noise in the D300. The original image is so flat it looks like blue ghost > on an aluminum sheet. > > I'll go back to this later today and see if I can improve it. > > Thanks for calling it to my attention. > > Regards, > > Dick > > > > On Aug 09, 2010, at 2:43 PM, George Lottermoser wrote: > >> Really? >> I've never seen this uniform pattern before. >> Amazing >> >> Regards, >> George Lottermoser >> george at imagist.com >> http://www.imagist.com >> http://www.imagist.com/blog >> http://www.linkedin.com/in/imagist >> >> >> >> >> >> On Aug 9, 2010, at 1:19 PM, Richard Taylor wrote: >> >>> The "noise" is atmospheric refraction. Can't do much about that. >>> >>> Regards, >>> >>> Dick >>> >>> >>> >>> On Aug 09, 2010, at 2:04 PM, George Lottermoser wrote: >>> >>>> I find the "weight" of the water and POV >>>> very compelling (in the tiny image). >>>> >>>> and the "noise" extremely unpleasant >>>> and totally destroying the effects mentioned above >>>> when viewing the larger image >>>> >>>> which I don't understand. >>>> I thought the d300 held the noiseless record to date. >>>> >>>> Regards, >>>> George Lottermoser >>>> george at imagist.com >>>> http://www.imagist.com >>>> http://www.imagist.com/blog >>>> http://www.linkedin.com/in/imagist >>>> >>>> >>>> >>>> >>>> >>>> On Aug 9, 2010, at 12:46 PM, Richard Taylor wrote: >>>> >>>>> Last Saturday we had one of our rare super visibility days on the >>>>> water and a knife-edge horizon. Usually, distant views show vertical >>>>> smearing due to refraction. >>>>> >>>>> The was taken on Vineyard Sound from a point just off Woods Hole. The >>>>> boats are at the entrance to Vineyard Haven on Martha's Vineyard. >>>>> East Chop is the point of land to the left; West Chop the one to the >>>>> right. This a 100% crop with the 70-200 zoom at 200 mm from about 3.6 >>>>> nautical miles off West Chop. The horizon is about 2 miles away from >>>>> our position. >>>>> >>>>> The scene was very low contrast and the autofocus on the D300 had a >>>>> hard time locking up. Manual focus wasn't much better since the lens >>>>> has no infinity stop. Only two shots out of ten were properly >>>>> focused. >>>>> >>>>> http://gallery.leica-users.org/v/rtaylor/PICKS/2010_boating/300_8509.jpg.html >>>>> or >>>>> http://tinyurl.com/2ctkot6 >>>>> >>>>> C&C always welcome. >>>>> >>>>> Regards, >>>>> >>>>> Dick >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> Leica Users Group. >>>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>> >>>> >>>> _______________________________________________ >>>> Leica Users Group. >>>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information