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  • digiscoping adapter

    I took this photo of a Gilded Flicker excavating a cavity in a saguaro cactus with my new "digiscope." It gives the 35mm-equivalent field-of-view and aperture of a 3100mm f10 lens. But as you can see, the spotting scope is a lightweight -- a Pentax PF 65A II with 14mm eyepiece giving a 28X magnification. The camera is a Canon A570, a relatively inexpensive P&S with a 35-140mm (equivalent) zoom. The entire outfit including tripod weighs 5.5 pounds.

    The key to making this easy to use in the field is the slip-fit adapter collar, which I machined out of Delrin. The length of the adapter is not too critical if used with a wide-angle eyepiece -- mine locates the front lens element about 3/8" from the eyepiece element.

    I shoot with the camera at max telephoto. To avoid all vibration I use the self timer. I have not quite figured out how to adapt a cable-release, but that would be advantageous for photos of active birds like woodpeckers.





    Allan Ostling

    Phoenix, Arizona

  • #2
    Reminds me of what I did about 52 yrs ago with my Exacta SLR and
    half of a pair of 7x binoculars. With the 180mm lens and the 7x
    it made some pretty good telephoto shots.
    I'll have to see what I can do now with the digital but with a 10x
    optical zoom I may not need to for the kind of pix I take now.
    That is quite a good shot of the flicker.
    ...lew...

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    • #3
      Very nice!

      I'm surprised someone hasn't come up with an infared triggering device, or wireless...like bluetooth. Seems like there are lots of tripod type photo's which would benefit from a remote trigger.

      rollin'

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      • #4
        Originally posted by rollin45
        I'm surprised someone hasn't come up with an infared triggering device, or wireless...like bluetooth. Seems like there are lots of tripod type photo's which would benefit from a remote trigger.
        Only Samsung makes a digital P&S camera with an infrared remote. I'm awaiting delivery of a Samsung NV10 which I found on eBay for a very reasonable price, and will see how it works in this application.
        Allan Ostling

        Phoenix, Arizona

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        • #5
          That looks really good Allan. Afocal coupling isn't always as sharp as that. Absent a shutter release look for a delayed shutter mode, or "slow" shutter. Many PS cameras have that available. They often have a short version of the time release, 2 seconds instead of ten second countdown.
          Free software for calculating bolt circles and similar: Click Here

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          • #6
            Originally posted by Evan
            Absent a shutter release look for a delayed shutter mode, or "slow" shutter. Many PS cameras have that available. They often have a short version of the time release, 2 seconds instead of ten second countdown.
            Evan,

            The Canon A570 has both the 10 and 2 second delayed release, and something even better for capturing perching birds: a custom delay which allows the user to select the delay time, and the number of shots (1 to 9) in a burst mode. I chose a burst of three shots to get this flicker.
            Allan Ostling

            Phoenix, Arizona

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            • #7
              I had some fun myself, making a photography adapter with my lathe, however, mine was for some things that were rather closer and smaller.

              It is made of nylon which seemed quite easy to machine. It fits onto the eyepiece of the camera or can be used with the eyepiece removed.



              And the camera lens fits into the other end.



              Got one shot of an old cobbweb with some other junk in it.



              and this one is something you'd find on your dinner plate. Any guesses?

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              • #8
                Nice pics. Even nicer bit of nylon. Quite a waste using it for that purpose. That's graphite filled nylon, also known as ballistic nylon. It is very tough and makes great bearings for high load, low speed or oscillating service. It also costs a lot.
                Free software for calculating bolt circles and similar: Click Here

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                • #9
                  Oh yeah, this is something I found in my ear a couple of years ago. Any guesses?



                  Nice microscope.
                  Free software for calculating bolt circles and similar: Click Here

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                  • #10
                    Originally posted by Evan
                    Nice pics. Even nicer bit of nylon. Quite a waste using it for that purpose. That's graphite filled nylon, also known as ballistic nylon. It is very tough and makes great bearings for high load, low speed or oscillating service. It also costs a lot.
                    I know what it cost's because I paid retail for a 12" chunk of it. What is a good source for cheap plastic to do this kind of thing with? I know in college, we had gray plastic in many sizes and I'd like to get some of that.

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                    • #11
                      Originally posted by Evan
                      Oh yeah, this is something I found in my ear a couple of years ago. Any guesses?



                      Nice microscope.

                      If you've got that in your ear, you're in trouble. You sure it was your ear?

                      Aspergillus niger is a fungus and one of the most common species of the genus Aspergillus. It causes a disease called black mold on certain fruits...

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                      • #12
                        It was in my ear all right. Took a couple of months and a series of wrong diagnoses by the doctors before I cultured it myself and established what it was to the specialist. A. Niger is the most common cause of fungal ear infection and it sucks, believe me. It's gone now but I still have a slight residual hearing loss.
                        Free software for calculating bolt circles and similar: Click Here

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                        • #13
                          Originally posted by Evan
                          It was in my ear all right. Took a couple of months and a series of wrong diagnoses by the doctors before I cultured it myself and established what it was to the specialist. A. Niger is the most common cause of fungal ear infection and it sucks, believe me. It's gone now but I still have a slight residual hearing loss.
                          OK, I guess the http://vts.bc.ca/pics/aniger1.jpg image source was a bit of a red herring then.

                          So is this what is commonly referred to as swimmers ear?

                          Regarding my mystery image, a bit of a hint is that it's something that's commonly used to culture A.Niger.

                          The microscope used to belong to my late grandfather who was one of the first district managers for BC Hydro and was a great inspiration for me as it seemed he could make anything.

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                          • #14
                            Originally posted by BCtech
                            What is a good source for cheap plastic to do this kind of thing with? I know in college, we had gray plastic in many sizes and I'd like to get some of that.
                            I got my Delrin on eBay. But Online Metals cuts it to order http://www.onlinemetals.com/merchant...17&top_cat=181.
                            Allan Ostling

                            Phoenix, Arizona

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                            • #15
                              Originally posted by aostling
                              I got my Delrin on eBay. But Online Metals cuts it to order http://www.onlinemetals.com/merchant...17&top_cat=181.
                              Now I'm wondering if I paid the right price for the Nylon. It was $20 for the foot of 2" and I see from your link that the acetal is $17.76 per foot for 2".

                              What should the graphite filled nylon be per foot?

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