Hunters Moon
- Thread starter AlanF
- Start date
There were hazy clouds over half the sky that obscured the lovely supermoon. That meant that the other half of the sky was clear, and since there are supermoons every 3-4 months but Comet C/2023 A3 Tsuchinshan-ATLAS comes only once every 80,000 years, if there were going to be clouds they were in the right place.
Comet C2023 A3 Tsuchinshan-ATLAS
EOS R3, EF 600mm f/4L IS II + EF 1.4x III Extender, 0.8 s, f/5.6, ISO 6400
Comet C2023 A3 Tsuchinshan-ATLAS
EOS R3, EF 600mm f/4L IS II + EF 1.4x III Extender, 0.8 s, f/5.6, ISO 6400
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Did this image require cropping or thats it? I'm in Bangkok and it's too smoggy to see at all.
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Great. I was out shooting in the evening, but haven't looked at the raws yet. There seemed to be a bit of a haze, but at least I've got a couple of images from a couple of days ago.
Putting this up as a reminder to myself to look at them tonight and post up here.
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You can calculate thee focal length of the RF 200-800mm when set to 800mm for very long distances from the current distance to the moon, its radius and the size of the image on the sensor (1750px = 7.69mm): f = 7.69x(357902+1737.4)/3474.8 = 796mm. (assuming moon-earth distance reported is surface to surface and sensor is 36mm wide).
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You always impress me with the equations. I can't ever remember most of them.
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So everything else than the 7.69mm is the "magic constant" of 103.5? So if I have a 1779px tall moon on a 4000px tall FF senson (R3: 6000x4000), the moon is 1,674mm tall, which means that I'm shooting at f = 10.674 * (357902+1737.4/3474.8 mm = 10.674 x 103.5 mm = 1105mm (400 + 2x TC + 1.4x TC = 1120mm).
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Image from two days ago. R3, EF 200-400mm f/4L + EF 2xTC Mk II + EF-RF adapter (800mm). Tripod and remote release. 1/160s, f/11, ISO 400. Cropped to 1714x1714 and resized to 1600px.
Yesterday's Hunter's Moon. R3, EF 200-400 f/4L + 1.4x ext + 2x TC Mk III + EF-RF adapter (1120mm). Tripod and remote release. 1/400s, f/11 ISO 1600. Cropped to 2400x2400 and resized to 1600px.
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You can see nicely that 2 days ago you weren't quite at full moon from the shadows on the extreme left that emphasize detail.
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Yes, and that detail exemplify why people often say that shooting the full moon is not as interesting as a partial moon.
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You need shadows to bring out the craters, and full moon has the least with the sun being "overhead".
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