Re: [darktable-user] high altitude photography correction challenge
On 2019-07-18 01:25, I. Ivanov wrote: Recently I took some pictures on a higher altitude - Untersbergbahn GmbH. What I noticed is that they have quite a strong blue hue to them. This however is only for the landscape pictures (mountains / valleys) that I took. I would be surprised if you'd get this working at all. The (IMHO) most important aspect of h.a. photography is the shear distance between you and the subject.That can add up to 50 kilometers or more (as you can clearly see from your mountain pictures). Between you and the subject there are so many moist and dust particles that half of the light is gone, and the other half is distorted. And you don't even get to chose which half you get. I live in remote flat area with outlook on distant mountains. And I see the same sort of problem. On a sunny, dry summer day "my" mountains are grayish and dull , while after a big storm I have clear vision, with vivid colors for at least 25 kilometers. My best guess is that successful h.a. photographers simply wait for the best opportunity: such as after a big rain, when the air has been washed clean. Or during winter time, when the air is dry(er). Koos darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
[darktable-user] high altitude photography correction challenge
Hi All, Recently I took some pictures on a higher altitude - Untersbergbahn GmbH. What I noticed is that they have quite a strong blue hue to them. This however is only for the landscape pictures (mountains / valleys) that I took. The pictures I took of people (few meters away) are just fine. I did take gray card white balance and the one facing the sun measures at temperature 6498 while the other (slightly tilted to be shaded) measures at 8984. I was unable to produce a pleasing result with either - even with standard cloud / daylight settings in DT. I used Canon 70D with 50mm 1.4 lens with polarizing filter. However - I did not see much difference to the pictures taken on 18-135mm lens. DT is 2.6.2 on ubuntu 16.04 The link https://www.dropbox.com/sh/sf7znezb45ghnr2/AADCPgrFycbSPlxaFOfSNWiHa?dl=0 contains two .jpg, CR2 and the 2 .xmp - quite unsuccessful attempt from my side to develop the images. All that I searched on the web points to physical challenges with high altitude photography but I was unable to find anything specific when it comes to developing such or if I needed special equipment (like specific filter) to take such pictures. Would you be able to have a look please and let me know what I am missing? My attempt to develop the picture fails miserably comparing to the stunning view from the mountain. The weather was a bit hazy and I did not have a haze filter but I can't think of anything else. The histograms fitted nicely. Is it simply some particular way to develop such images that I am not aware of? I would appreciate it if you can please point me in the right direction Thank you, B darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
