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Thread: Post Your Photos Made At Close Distance

  1. #531

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    Re: Post Your Photos Made At Close Distance

    Quote Originally Posted by r.e. View Post
    What sextant did you use? Still have it?
    It was a plastic Davis Mark Master. No, I don't have it anymore.

    I really didn't need the Astronomical Almanac for navigation, of course. I once ordered full-precision planet and moon ephemeris from the US Naval Observatory that came on a big magnetic tape. But the coordinate data was referenced in the Terrestrial Dynamic Time (TDT) scale. So I had to dive into the astronomical end to learn about all the different time scales, how to use and where to find the data to convert between some of them.

  2. #532

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    Re: Post Your Photos Made At Close Distance

    Quote Originally Posted by tuco View Post
    It was a plastic Davis Mark Master. No, I don't have it anymore.

    I really didn't need the Astronomical Almanac for navigation, of course. I once ordered full-precision planet and moon ephemeris from the US Naval Observatory that came on a big magnetic tape. But the coordinate data was referenced in the Terrestrial Dynamic Time (TDT) scale. So I had to dive into the astronomical end to learn about all the different time scales, how to use and where to find the data to convert between some of them.
    In about 1995, I crewed for a friend across the English Channel using a GPS "hockey puck", and I haven't taken a sextant along since. I still have a Japanese Tamaya, which I take out about once a year to see if I remember how to use it. Just checked, and the Nautical Almanac is still published annually. The U.S. Naval version is only available in hard cover, but the U.K. Admiralty version is also in e-book. I've always seen the Almanac as a very cool book. I'm tempted

    For those who might be interested, the Nautical Almanac is the book in the lower left of Tuco's photo, post #526. It contains data for the sun, the moon, the visible planets and a select group of stars. This data is used with a sextant, the time of day and some simple arithmetic to determine your location on Earth. Quite a magical process that also makes one appreciate how amazing GPS is.

  3. #533
    http://www.spiritsofsilver.com tgtaylor's Avatar
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    Re: Post Your Photos Made At Close Distance

    For "celestial navigation" i use this: https://secure.rasc.ca/store/product...-handbook-2022

    Thomas

  4. #534

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    Re: Post Your Photos Made At Close Distance

    Quote Originally Posted by tgtaylor View Post
    For "celestial navigation" i use this: https://secure.rasc.ca/store/product...-handbook-2022
    Different kind of navigation, and I haven't used it, but that Royal Astronomical Society of Canada book is said to be superb.

  5. #535

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    Re: Post Your Photos Made At Close Distance

    Very nice

  6. #536

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    Re: Post Your Photos Made At Close Distance

    Keith/Tin Can,
    It was in a bunch of other lenses I purchased. It is by no means a beauty, with cleaning marks and haze. I'm working on my c41 at home process and thought "why not give this thing a whirl". I'm sure someone will enjoy it-I just have too many projects. One of the reasons I love having a speed graphic around-just about anything can be slapped on the front!

  7. #537

    Re: Post Your Photos Made At Close Distance

    47mm F8 F32 4x5 Norma HP5 by Nokton48, on Flickr

    My widest LF lens, the chrome 47mm F8 Super Angulon in Compur shutter at F22. Mounted on an original Sinar Norma Recessed Lensboard. Tim Kelly lighting, extreme close-up, lens less than a foot away from my test target. Three Broncolor Pulso C171 Monolights plus fill panel, HP5+ 4x5 (in Linhof Plate Holder) D:23 1;1 in 8x10 Unicolor Unidrum and Uniroller. 8x10 4X print Arista #2 RC Multigrade dev Omega DII laser aligned 180 black Rodagon Omegalite Diffusion Head

    In close up mode this lens -almost- covers 4x5. You can see that in the four corners of this shot
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
    ― Mark Twain

  8. #538
    Tin Can's Avatar
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    Re: Post Your Photos Made At Close Distance

    Very informative

    Does subject have a bad side?

    It is a handy sitter!

    Quote Originally Posted by Daniel Unkefer View Post
    47mm F8 F32 4x5 Norma HP5 by Nokton48, on Flickr

    My widest LF lens, the chrome 47mm F8 Super Angulon in Compur shutter at F22. Mounted on an original Sinar Norma Recessed Lensboard. Tim Kelly lighting, extreme close-up, lens less than a foot away from my test target. Three Broncolor Pulso C171 Monolights plus fill panel, HP5+ 4x5 (in Linhof Plate Holder) D:23 1;1 in 8x10 Unicolor Unidrum and Uniroller. 8x10 4X print Arista #2 RC Multigrade dev Omega DII laser aligned 180 black Rodagon Omegalite Diffusion Head

    In close up mode this lens -almost- covers 4x5. You can see that in the four corners of this shot

  9. #539

    Re: Post Your Photos Made At Close Distance

    Quote Originally Posted by Tin Can View Post
    Very informative

    Does subject have a bad side?

    It is a handy sitter!
    Actually it's from IKEA and it's very cooperative and patient
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
    ― Mark Twain

  10. #540

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    Re: Post Your Photos Made At Close Distance

    Trying out Delta 100 in sheet film


    Underwood by tuco, on Flickr

    45 Wista RF, Caltar-S II MC 210mm, Delta 100, D-23

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