George Preoteasa

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  • in reply to: Halos And Rainbows Volume I #248289
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Simple maybe, but very clever framing.

    in reply to: Contrail Thread Volume 1 #247880
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Wow, that’s a crazy sky, Alec!

    And in response to Hans’s “how broad”, here is an overhead “pano” on a day when contrails were really thick. Start from the bottom and scroll up, that’s how I took the picture.

    IMG-3587

    in reply to: Sunrises And Sunsets Volume I #246371
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Woo-hoo, lets’ roll!

    Another good thing about this time of the year, at least for me, is that the Sun sets early while I am still in the office, high up, from where I have this view.

    DSC03160

    in reply to: To ‘shop, or not to ‘shop, Photoshop is the question #245808
    George Preoteasa avatarGeorge Preoteasa
    Participant

    One of the problems is that what you see with your eyes is not what the camera captures by default (e.g. in the auto-everything mode). So what to do? I am learning that you can play with a few parameters (exposure compensation, white balance, probably others). So then why not use an editor afterwards? I think the idea is to stay true to what you saw,

    Also, if it’s something really hard to notice, like a faint optical phenomenon, I would enhance the photo and just state it.

    in reply to: Castellanus on top of a contrail? #245648
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Me again with the upward lobes. Not as clear (and partly because of my poor focusing skills) but I think the upward tendency is there. I’m aiming 30-40 degrees above the horizontal.

    contrail_lobes2

    in reply to: Quantum physics in one easy lesson #245646
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Available only in the UK :-(

    in reply to: What a halo in Sweden #244992
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Aha! Did not cross my mind, thanks for the explanation, Alec!

    in reply to: Castellanus on top of a contrail? #242440
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Hygge, I have a zoom that goes to 300 mm focal distance, though (I am told) for the sensor in my camera, it is actually a 450 mm.

    WRT up/down, both shots I posted were looking up at no more than 45 degrees. Hard to believe those lobes had no significant upward component. Hygge, from the way the airplane looks, your shot could be almost looking 90 degrees up.

    in reply to: Not B&W #241350
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Keelin, you are absolutely right! Beautiful.

    Hans, yes, the video author explained in the text it’s a subsun, but the video title was dancing sundog, so why not play along? Your stray sundog is cute.

    in reply to: Not B&W #240636
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Keeling, speaking of sundog dance, how about a dancing sundog?

    :-)

    in reply to: Not B&W #240635
    George Preoteasa avatarGeorge Preoteasa
    Participant

    One day this past October, I am walking in the park, where I have a good view of the skies, and looking around, I see conditions conducive to CZAs. So I look up and, sure enough, there is one. Not outstanding but visible. I start taking pictures with the app. A man, curious, stops by and asks what am I taking pictures of. I just point and look up. He looks for a little while and then says: “Oooh, rainbow … but no rain!?”

    An optical phenomenon, I explain. I think he was happy to learn something new.

    in reply to: Not B&W #240512
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Keeling, nice, a halo with colors!  Did you look directly up to check for a CZA?

    This is a lucky shot from a few weeks ago, the sun dog was very intense. Picture taken with iphone 6, not edited. When using the DSLR, I set the exposure compensation to some negative value to preserve the colors. Here it worked very well without tricks (other than a bit of cropping and whatever an iphone does under the covers).

    sundog

    in reply to: Castellanus on top of a contrail? #240135
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Now I am a bit obsessed.  Doing some google research, I find references to lobes or pendules, but all references are to things hanging down. Among others, I found a serious article:

    http://onlinelibrary.wiley.com/doi/10.1002/wea.2765/full

    which, interestingly, shows a picture of contrails exhibiting the same upward lobes, but does not mention them (maybe it does at some point, I did not read the whole article, TBH).  (Do look at the link above, the picture is of WWII fighter plane contrails, quite unusual.)

    So here is my shot of today with upward lobes. There is a certain regularity, which makes me think this may be a turbulence effect, rather than thermal (convection).

    Finally, while doing this search, I found what appears to be a Thai Airlines commercial showing some nice contrail iridescence:

    Hope you enjoy it.

     

    contrail_lobes

    in reply to: Gurushots Clouds #239995
    George Preoteasa avatarGeorge Preoteasa
    Participant

    I am looking at the pictures, and they are striking and beautiful, but something bothers me. I have never seen colors as intense at these. Could they all be photoshop’ed?

    in reply to: South Carolina, USA II #239536
    George Preoteasa avatarGeorge Preoteasa
    Participant

    Nice shots, Roger. I would say the top one could be asperitas. The bottom one is a chaotic sky, a bit of everything at all levels.

Viewing 15 posts - 271 through 285 (of 353 total)