learning the limits of the Sony 500 mm f/8 mirror lens

The baby eagle and I waited for two and a half hours for mom and dad to show up with something to eat. I gave up and returned home with this photo of Jr Eagle alone in the nest. As I watched and waited for mom and dad to return, I began to wonder if they just got tired of feeding him and waiting for this big guy to leave the nest and when he did not, they decided to leave the nest to him and struck off to find their own retirment home. I can think of some humans I know who should do this.

This was the best photo I got.

I forgot to bring my tripod. I had my monopod but this photo was taken hand held with me laying flat on my back. I got less shake that way. I used my 500 mm mirror lens f/8, ISO 1600, 1/1000 of a second. I pushed the picture one f stop to get the dark bird, otherwise the camera would have used 1/2000. I have included two images from the same shot. The first is a small section from the center of the total frame using the RAW image. The original frame was taken with the camera held at a 45 degree angle, simply because this was the most comfortable way to hold the camera and minimize shake. I cropped and straightened the portion I wanted in PhotoShop. The full image is the full JPG image as converted by the camera.

I was about 450 feet from the nest. At this distance I found the lens very hard to focus. The slightest movement caused the focus to move off the Eagle. Because the lens always at f/8 and I was looking at a small object as seen thru a100 view finder.

I twisted myself on the ground into a posistion where the camera was supported by my cheek bone. My head was on the ground and shake was minamal. I decided I would shot it this way and crop it and streighten later in PhotoShop.

I found myself wishing for a brighter, longer lens and a brighter view finder.

Dave

Click to raise

Click to raise

__________________

Body:Alpha 100
Sony lenses: 18-70mm f3.5-5.6 DT, 11-18mm f4.5-5.6 DT
100mm f2.8 Marco,75-300mm f4.5-5.6, 500mm f8 Mirror, 50mm f1.4


Reply

The content of this field is kept private and will not be shown publicly.
  • Allowed HTML tags: <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd>
  • In forums, registered users can post images by merely pasting the image urls(max eight images) from wherever they are hosted.
    Example of url to paste: http://your-web-hosts-name.com/your-image-name.jpg

    If your images do not display some hosts such as PBase require you use special links or similar, to show images offsite.
    If posting from Flickr be sure to post the direct url including file extension(right click copy image location), not just the directory.
    Links with unusual special characters or that are extremely long, will likewise not display.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.

More information about formatting options

CAPTCHA
Sorry spammers make us have to do this. If you can't read it, there is a reload button to get a new one.