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| Night Sky Photography - Page 11 | |
| An Equatorial Mount: My lucky day! | Rate Topic |
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| Posted: Thu Aug 29th, 2019 17:17 |
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101st Post |
jk
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Ok probably best to use pack voltage of 7.2 volts made by a pair of cells in series. I know that the different manufacturers' use different voltages but the worst part is finding ways of connection to these different batteries. Each seems to have their own proprietary connection mechanisms.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Jul 20th, 2020 04:33 |
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102nd Post |
Robert
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We are currently blessed with Comet Neowise which is just about visible to the naked eye low in the Northern sky, just to the East of Ursa Major. Last night was the first opportunity to see it due to almost continuous night time cloud cover since I became aware of the Comet. Neowise is scheduled to peak it's presence about the 25th July. Here is my first attempt to photograph it, about 2am BST 20 July 2020. Nikon D800, Nikkor 300mm f/2.8 wide open, 15 seconds, ISO 800.  Click here to comment on this image. If the weather permits I would like to try again, it would be nice to include a terrestrial subject as foreground but at lease I have managed one image of our visitor. Edit: Since posting the image I notice the graduation of light around the comet is poor, I hope to post again with a decent graduation, I exported a JPEG from the TIFF output of Photoshop due to space considerations but perhaps it wasn't high enough quality?
____________________ Robert. |
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| Posted: Mon Jul 20th, 2020 08:37 |
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103rd Post |
Eric
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That's an excellent capture Robert. Most of the shots I've seen on line have significant terrestrial subject matter included (ie wider angle). As a result, the comet is a small dot and smudge against a large plain sky ...which helps it stand out more I guess.
____________________ Eric |
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| Posted: Mon Jul 20th, 2020 10:30 |
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104th Post |
jk
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This image on the Fuji-X forum (also on her Flickr) is the best I have seen. Original here... https://live.staticflickr.com/65535/50119671932_b637ddfb62_h.jpg 
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Jul 20th, 2020 11:24 |
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105th Post |
Robert
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Interesting image... No movement in the stars but there are no waves in the water either... My guess is the stars have been pasted in, if an astro mount had been used the terrestrial highlights would have shown trails. Is the blue at the lower edge of the comet CA? I am guessing so. I will reprocess the image but I now wish I had made the exposure as an NEF, I had forgotten I had set the D800 in JPEG mode because I have been doing time-lapse.
____________________ Robert. |
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| Posted: Mon Jul 20th, 2020 11:28 |
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106th Post |
Robert
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Eric wrote:That's an excellent capture Robert. Thanks Eric, The first one I saw was Stone Henge, that was what alerted me to the presence of the comet. I usually try to include a terrestrial feature but it isn't always easy. I wonder what it's like in Wasdale, with Gable and Scafell in the foreground. It's a fair drag up there to discover it's not high enough in the sky.
____________________ Robert. |
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| Posted: Mon Jul 20th, 2020 12:25 |
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107th Post |
jk
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The exposure of the image I posted a link to was ISO1600, f2.8, 8secs.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Jul 20th, 2020 12:58 |
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108th Post |
Robert
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jk wrote:The exposure of the image I posted a link to was ISO1600, f2.8, 8secs. At 8 seconds I would expect elongated stars, mine was 15 seconds, admittedly with a longer lens...
____________________ Robert. |
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| Posted: Mon Jul 20th, 2020 13:14 |
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109th Post |
jk
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Robert wrote:At 8 seconds I would expect elongated stars, mine was 15 seconds, admittedly with a longer lens... She used a 14mm lens on an APS-C sensor so quite a difference in focal length.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Mon Jul 20th, 2020 15:14 |
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110th Post |
Robert
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jk wrote:She used a 14mm lens on an APS-C sensor so quite a difference in focal length. Ah, OK I accept that explains it. It seemed to be closer than an ultra wide and rectilinear thrown in. Perhaps I should try the 16 fish... It's looking cloudy again tonight.  I was gearing up to nip up to Wasdale. ☹ï¸
____________________ Robert. |
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