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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. janvangastel

    Extreme Digiscoping

    Yesterday I digiscoped this flock of barnacle geese with starlings in the background. Distance is a litte over 500 meters.
  2. janvangastel

    Extreme Digiscoping

    Short-toed Eagle The bird I digiscoped at the largers distance is the attached Short-toed Eagle, at a little more then 600 meters. See for more log distance shots my long distance album at http://gallery.janvangastel.nl/#!album-0.
  3. janvangastel

    Extreme Digiscoping

    The angle of view changes and so the magnification changes. By multipying magnification with 50 you get the 35 mm equivalent tele length. So yes, the focal length does not change, but the system acts as if it did.
  4. janvangastel

    Extreme Digiscoping

    Very nice at this large distance Neil!
  5. janvangastel

    Extreme Digiscoping

    Nice, sharp image Neil!
  6. janvangastel

    Extreme Digiscoping

    I used manual focus. AF doesn't work well a large distances with my camera.
  7. janvangastel

    Extreme Digiscoping

    Buzzard at 174 meters A couple of days ago, I digiscoped this Buzzard. Distance measured with Google maps. Not very detailed at this distance, but I am still happy with it. Taken with Panasonic DMC G3 camera with 30 mm Sigma lens, Swarovski ATM 80HD and DCB adapter. Total magnification 60 x.
  8. janvangastel

    Extreme Digiscoping

    Despite the long distance, nice detail in the head of the bird Rick.
  9. janvangastel

    Extreme Digiscoping

    Jerry, what was the distance to the bird?
  10. janvangastel

    Extreme Digiscoping

    This morning I could digiscope this great spotted woodpecker at 145 meters distance. It is still very well recognizable.
  11. janvangastel

    Extreme Digiscoping

    Thanks for anwering all of my questions Neil.
  12. janvangastel

    Extreme Digiscoping

    Neil, I am very interested in the Sony RX100 II. I hope you can answer some of my questions. I have a Swarovski ATM 80 HD and a DCB adapter 1. Is it possible to shoot in RAW using 'burst mode'? My Panasonic can only do the smallest JPEG's in super burst mode, the only mode with no mechanical...
  13. janvangastel

    Extreme Digiscoping

    This morning the air was stable and clear after some rain last night. I photographed this starling at 100 meter distance, at 60x magnification. It's uncropped. His head was a little in the shade, but I think it's not a bad picture for such a small bird at this distance.
  14. janvangastel

    Extreme Digiscoping

    I have done some experimenting and noticed that: 1. At short distance - say up to 25 meters at least - It is better (with my setup, Swarovski ATM 80 HD and Panasonic DMC G3 with 30 mm Sigma lens) to keep the telescope's magnification low, not higher then 30x, for good quality images 2. A...
  15. janvangastel

    Extreme Digiscoping

    I also tried a larger distance this morning, on a Collared Dove: 180 meters. I used my Swarovski ATM 80HD and Panasonic DMC G3 with a 30 mm Sigma lens. Total 35 mm equivalent 3000 mm. Including some cropping I also arrive at around 3300 mm. Not bad, but not nearly as sharp as Neil's purple heron.
  16. janvangastel

    Extreme Digiscoping

    OK, thanks for the clarification Neil. Very nice setup! Is this your private cabin or is a public?
  17. janvangastel

    Extreme Digiscoping

    Neil, I looked into the exif to understand the calculation. According to the exif data a NIKON Coolpix 330 was used for this picture, with a crop factor of 4.6. With that, I also arrive at around 3300 Fl for 35 mm equivalence. The Sony has a crop factor of 2.7. Do I understand something wrong?
  18. janvangastel

    Extreme Digiscoping

    At 200 meters...that's very good. How much is the total magnification you used on this one, or the 35 mm equivalent telelens length?
  19. janvangastel

    Extreme Digiscoping

    This morning I tried to digiscope a pigeon at about 75 meters distance. When I looked through my viewfinder I could clearly see the heat vibrations going up from the roof of the building. The attached photo also shows (the effect of) the heat vibrations, especially in the background. And also...
  20. janvangastel

    Extreme Digiscoping

    Very nice pictures Tord. How do you focus on a flying damselfly, manually or automatically? They don't follow a straight line of flight, so it seems extremely difficult to me.
  21. janvangastel

    Extreme Digiscoping

    Calvin, the song sparrow has much detail, especially given this very large distance. I also like the 230 meter kite with the mouse.
  22. janvangastel

    Extreme Digiscoping

    Yes, air condition is very important and can be very frustrating if bad. Yesterday I tried to photograph pigeons at about 60 meters, but none of the pictures was good enough. This morning, when I photographed the sparrow, atmospheric condition was much better. I have also tried airplanes, but...
  23. janvangastel

    Extreme Digiscoping

    I think you are absolutely right about the importance of haze, air turbulence etc. for extreme digiscoping. I am not sure about the size of the bird. Of course the resolution power and other factors you mention are very important factors, but untill now I haven't been able to make a reasonable...
  24. janvangastel

    Extreme Digiscoping

    I think 'extreme' also depends on the size of the object (bird) being digiscoped. A sparrow for instance, is 15 cm, a wood pigeon 40 and a grey heron 95 centimeters (all measured from point of beak to end of tail). So 150 meters for a grey heron is equally extreme as 63 meters for a pigeon and...
  25. janvangastel

    Extreme Digiscoping

    Wood pigeon at 120 meters I love this thread. I have photographed this wood pigeon this morning, at 120 meters distance. Not as far as Neil's osprey, but a pigeon is only half as large. Magnification 40x, which is the maximum for my scope and camera combination (Panasonic DMC G3 and Swarovski...
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