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Thread: safe haven for tiny formats

  1. #13211

    Join Date
    May 2013
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    Central Minnesota
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    Re: safe haven for tiny formats

    Quote Originally Posted by Randy Moe View Post
    A very beautiful image.

    Do you think raising the ISO 4 stops which would shorten exposure 4 stops would have lessened the star movement?

    Would that have significantly affected your capture?

    I understand time was short. Just looking for more process.

    I took multiple images of the scene, with different ISOs set, up to 6400. I found the files with ISO 400 were the most malleable. Increasing the ISO caused the Kilauea glow to lose detail and blow out. At ISO 400, the Milk Way and stars were dim, but I was able to increase exposure on those areas without adding any more noise than had it been shot at a higher ISO. Ultimately, balancing the cloud glow vs. the night sky was the most difficult part.

    With such a high megapixel camera, even at 15 seconds, there is a bit of star movement. As was mentioned, there is definitely some coma in the corners from the lens being shot wide open. If I had more time, I might have played around with some shorter exposures, but I worry that the noise might have increased too much. Because of the cloud movement, and short window of opportunity, it wasn't a good candidate for stacking techniques. Also, I am definitely not an expert at astrophotography. This was really my first attempt in good, non light polluted conditions.

    If I had another crack at it, I might try a 10-second exposure with the same settings. I am convinced though, that there is no advantage to using a higher ISO than 400 on the D850. I was able to recover the exposure in post with the same noise as shooting natively at higher ISOs, with the advantage of having more usable dynamic range.

  2. #13212

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    Re: safe haven for tiny formats

    Quote Originally Posted by stawastawa View Post
    There shouldn't be much star movement at 15 seconds... It is more likely Coma towards the corners of the lens that is exacerbated by processing - especially since shot wide open.
    If you look at the stars in the center, there is some movement, but not much. It is more noticeable on the dimmer stars. There is definitely coma in the corners, but it is better than my old 20mm f/2.8 AIS that I had been using.

    Once I print it, I will have a better idea of how much movement is really noticeable. I'm hoping to get a nice 19-inch (A3+) print.

  3. #13213
    Tin Can's Avatar
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    Dec 2011
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    Re: safe haven for tiny formats

    Thank you for your detailed reply.

  4. #13214
    Scott Schroeder's Avatar
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    Mar 2004
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    Austin,TX
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    1,576

    Re: safe haven for tiny formats

    Canon 5D, Supertak 50, PS












  5. #13215
    David Lobato David Lobato's Avatar
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    Feb 2011
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    Baltimore MD
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    1,054

    Re: safe haven for tiny formats

    Little Gunpowder Falls this morning. Sony A7II.

    [img]A7208832 by blazingshutters, on Flickr[/img]


    [img]A7208837 by blazingshutters, on Flickr[/img]

  6. #13216

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    Sep 2003
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    Massachusetts USA
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    Re: safe haven for tiny formats


    Tulip, April 2018

  7. #13217

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    Sep 2003
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    Massachusetts USA
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    Re: safe haven for tiny formats


    Solar Eclipse, August 2017

  8. #13218
    Les
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    Dec 2011
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    Ex-Seattlelite living in PNW
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    1,235

    Re: safe haven for tiny formats

    Sometimes it's great to be at the right place and the right time. Dall sheep getting on the other side of the river....the hard way. Nikon D610 and 200-500 zoom.

    Click image for larger version. 

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    Denali. August 2017

    Les

  9. #13219

    Join Date
    Jul 2018
    Location
    Kiel, Germany
    Posts
    26

    Re: safe haven for tiny formats

    When I hear "tiny formats" I immidiatly think "Pentax Auto 110 Super" :-D. A great camera for urban stuff and whilst being a full automatic camera, it's capable of complex lighting situations like in this picture (with a Lomography Orca film).
    Attached Thumbnails Attached Thumbnails london_tate.jpg  

  10. #13220

    Join Date
    Dec 2014
    Location
    Nova Scotia
    Posts
    688

    Re: safe haven for tiny formats

    Trip 35, XP2, HC-110, X1 scan:

    Not Tall Enough by chrism229, on Flickr

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