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Alejandro Espeche

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  1. Thanks
    Alejandro Espeche got a reaction from Wally The Confused in Batis 18   
    Now I use my 18 for many different things: D

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  2. Like
    Alejandro Espeche got a reaction from DrJohn in King of vultures   
    I could never approach this bird before, photo taken in the Yungas Oranenses, Salta, Argentina.

    A7R3+FE100-400
     

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  3. Like
    Alejandro Espeche reacted to allan473 in Bird In Flight -- share your BIF photos here!!!   
    Sony A9 2 with 200-600 lens.
     

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    Alejandro Espeche reacted to syncusoidal in Wind Turbines waiting for Dawn   
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    Alejandro Espeche got a reaction from LiveShots in King of vultures   
    I could never approach this bird before, photo taken in the Yungas Oranenses, Salta, Argentina.

    A7R3+FE100-400
     

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  6. Like
    Alejandro Espeche got a reaction from Thad E Ginathom in Zoom for sports / BIF   
    If you are near the plane, it moves much faster than a bird in flight. I swear.

    Sony A6400 + 100-400

    ( Cropless image )

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  7. Like
    Alejandro Espeche reacted to LiveShots in Zoom for sports / BIF   
    Agreed, distance is the killer, taking photos of motorbikes heading into a wide corner, they were impossible to follow as they got closer.
    I could not twist fast enough to keep them in the frame for the last 1-2 seconds.

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  8. Like
    Alejandro Espeche reacted to Chrissie in Zoom for sports / BIF   
    Definitely so.
    From an engineering point of view: it's the angular velocity with which you would have to turn your head/camera to track an object, which is significantly different between the two.
    The sparrow has a size (length) of maybe 0.15m, yet can attain a speed of up to 60km/h! If you want to shoot the sparrow such that it covers the full width of your sensor, it should propably fly by no further than 1 m from your lens. Let's take 5m, which is more realistic.
    The Boeing 777 has a length of 273m and has a landing speed of 272km/h. You could probably shoot the Boeing from 300m away and still fill the width of the sensor.
    The angular velocity with which to follow the sparrow is 60km/h (= 17m/s) at a distance of 5m.   17m/s  divided by 5m = 3.5/s.
    The angular velocity with which to follow the Boeing 777 is 272km/h (= 76m/s) at a distance of 300m.  76m/s divided by 300m = 0.25/s.
    (Note, that this is not the true unit of measurement, yet the relation between the two is unaffected. Actually one would have to divide by 2*PI to arrive at the unit "rotations per second")).
    So the sparrow requires at least the 15-fold angular velocity while tracking the bird, compared to the plane. And that's a benevolent estimation. It's probably much worse.
    Plus, tracking a tiny bird (little coverage of the sensor) against a cluttered background is much harder than to track a plane (huge coverage of the sensor) against a "clean" background.
    In a further addition: the direction of movement of a landing plane is very predictable, compared to BIF in the wild.
  9. Like
    Alejandro Espeche got a reaction from LiveShots in A7Riii, 200-600, BIF Issues   
    Hi, what I mean is that the bird always has to be in the center behind the flight direction but taking advantage of the best of the lens to get focus.

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  10. Like
    Alejandro Espeche got a reaction from Thad E Ginathom in Bird In Flight -- share your BIF photos here!!!   
    Theristicus caudatus

    Hello guest! Please register or sign in to view the hidden content. R3 + 100-400
  11. Like
    Alejandro Espeche got a reaction from Thad E Ginathom in Bird In Flight -- share your BIF photos here!!!   
    King of vultures!!!

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  12. Like
    Alejandro Espeche got a reaction from Thad E Ginathom in A7Riii, 200-600, BIF Issues   
    I apologize for my English, I use Google Traslate and I sincerely believe that they should take my Wacom or teach me how to draw.
  13. Like
    Alejandro Espeche got a reaction from Thad E Ginathom in A7Riii, 200-600, BIF Issues   
    Hi, what I mean is that the bird always has to be in the center behind the flight direction but taking advantage of the best of the lens to get focus.

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  14. Thanks
    Alejandro Espeche got a reaction from Chrissie in A7Riii, 200-600, BIF Issues   
    Hi, what I mean is that the bird always has to be in the center behind the flight direction but taking advantage of the best of the lens to get focus.

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  15. Like
    Alejandro Espeche reacted to Chrissie in Bird In Flight -- share your BIF photos here!!!   
    In addition to the photographic merit, of course: as a biker, I like the way how this bird is doing a curved flight, yet keeping his head perfectly aligned with the horizon.
    Pretty much like motorcyclists do it, too.
     

    Hello guest! Please register or sign in to view the hidden content. Image source: http://www.ridesmart.info/img/blogs/leaning diagram.jpg
     
  16. Like
    Alejandro Espeche got a reaction from DrJohn in Bird In Flight -- share your BIF photos here!!!   
    Hello guest! Please register or sign in to view the hidden content. Dendrocygna viduata
    R3 + 100-400
  17. Thanks
    Alejandro Espeche got a reaction from Chrissie in A7Riii, 200-600, BIF Issues   
    Hello Chrissie

    I'm sorry for my late reply, I don't enter the forum much. I come from the world Nikon and Canon for nature, always with prime lenses. It is the first time I use a zoom for photography.

    My experience with Nikon was very good with the duplex D800 + 300 f4 still with teleconverter (always talking about BIF) and absolutely disastrous with the D810. When I sold all my Nikon equipment, I switched to Sony but in nature I bought the 7D Mark II with the 400 f5.6. It gave me a very good result.

    When I left the A7R3 I bought it, at first I used the 400 canon with a beautiful adapter (Metabones V) for birds perched but impossible for BIF.

    The thing changed with the FE 100-400, I can focus BIF of birds that fly between trees, those that just take off, to track the ones that I already hooked flying, even with very low contrast. Always use AF-C with focus by zones (the second in the list) always at the center. Never shot less than 1/1600 because fast. The OSS is always on but I guess it will get better when it's off, I don't know and I'm not going to find out.

    For me the secret of the BIF is to always focus one step before, keeping the bird in the back of the direction where one moves.
  18. Like
    Alejandro Espeche got a reaction from LiveShots in Bird In Flight -- share your BIF photos here!!!   
    King of vultures!!!

    Hello guest! Please register or sign in to view the hidden content. R3 + 100-400
  19. Like
    Alejandro Espeche got a reaction from LiveShots in Bird In Flight -- share your BIF photos here!!!   
    Hello guest! Please register or sign in to view the hidden content. Dendrocygna viduata
    R3 + 100-400
  20. Like
    Alejandro Espeche reacted to LiveShots in Bird In Flight -- share your BIF photos here!!!   
    That 600mm f/4 is amazing.
  21. Like
    Alejandro Espeche reacted to wildlightphoto in Bird In Flight -- share your BIF photos here!!!   
    all: a7rIII, 600mm f/4 GM

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  22. Like
    Alejandro Espeche reacted to davepnc in Bird In Flight -- share your BIF photos here!!!   
    a6000 with FE 70-200 Folly Beach SC

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  23. Like
    Alejandro Espeche reacted to Riku in Bird In Flight -- share your BIF photos here!!!   
    Sony A7R3 - before the serious fw upgrade. Sigma 150-600 - f6.3 @600mm 1/2000s

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  24. Like
    Alejandro Espeche reacted to Tim Driman in Bird In Flight -- share your BIF photos here!!!   
    Lilac-breasted Roller skims the freshly burnt patch in search for a freshly roasted insect :-)

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  25. Like
    Alejandro Espeche got a reaction from isha1 in Beauty   
    With Sony A7R3 and Batis 85
    CC
     

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