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04/05/2004 09:57:57 PM · #1 |
As a result of this thread
Moon
I have combined 2 images, one of the moon at moon rise (low on the horizion) and one a little later on when it was higher up in the sky.
Now it was said that they would be the same size, but as you can see by the photo that the moon at moon rise is actually a little smaller
the 2 images were taken 37 minutes apart, lens was at 400mm on each exposure
James
James
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04/05/2004 10:06:13 PM · #2 |
| I tried taking photos of the moon tonight and all I got was a white ball with no detail. I tried a few different settings and still the same result. Can someone tell me what I am doing wrong? |
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04/05/2004 10:08:44 PM · #3 |
At dusk, all thru April, you can see with the naked eye, four other planets aligned with the moon. Anyone take a pic yet?
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04/05/2004 10:16:49 PM · #4 |
Originally posted by eostyles:
I tried taking photos of the moon tonight and all I got was a white ball with no detail. I tried a few different settings and still the same result. Can someone tell me what I am doing wrong? |
what settings are you using...
for one of the moon shots I posted here I used manual settings
Shutter speed: 1/90 sec
Aperture: f/16.0
ISO: 200
Zoom (Focal length): 400mm (640mm equiv.)*
Exposure bias: +0.0 EV
Original image size: 3072 x 2048 Pixels
Flash used: No
Date picture was taken: 03/06/2004 (Sat)
Time picture was taken: 7:06 PM
Camera make: Canon
Camera model: Canon EOS D60
James
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04/05/2004 10:17:33 PM · #5 |
Originally posted by Rooster:
At dusk, all thru April, you can see with the naked eye, four other planets aligned with the moon. Anyone take a pic yet? |
cloudy here.... I realy wish someone would make a cloud filter that would make the clouds invisible to your camera/telescope
James
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04/05/2004 10:28:37 PM · #6 |
Jupiter, Venus, Mars and Saturn. Venus has been very predominant the last few weeks. I get the newsletter from Spaceweather to alert me to these fun things
a good shutter speed to start with is 1/125 when shootin da moon. Manual is definitely the way to do it.
Message edited by author 2004-04-05 22:29:36.
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04/05/2004 10:37:22 PM · #7 |
Ah, I think I was using too long of a shutter speed. I'll try again tomorrow night if its clear. Too damn cold tonight to go back out again.
Thanks....
Originally posted by jab119:
Originally posted by eostyles:
I tried taking photos of the moon tonight and all I got was a white ball with no detail. I tried a few different settings and still the same result. Can someone tell me what I am doing wrong? |
what settings are you using...
for one of the moon shots I posted here I used manual settings
Shutter speed: 1/90 sec
Aperture: f/16.0
ISO: 200
Zoom (Focal length): 400mm (640mm equiv.)*
Exposure bias: +0.0 EV
Original image size: 3072 x 2048 Pixels
Flash used: No
Date picture was taken: 03/06/2004 (Sat)
Time picture was taken: 7:06 PM
Camera make: Canon
Camera model: Canon EOS D60
James |
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04/05/2004 10:41:14 PM · #8 |
Originally posted by eostyles:
Ah, I think I was using too long of a shutter speed. I'll try again tomorrow night if its clear. Too damn cold tonight to go back out again.
Thanks....
Originally posted by jab119:
Originally posted by eostyles:
I tried taking photos of the moon tonight and all I got was a white ball with no detail. I tried a few different settings and still the same result. Can someone tell me what I am doing wrong? |
what settings are you using...
for one of the moon shots I posted here I used manual settings
Shutter speed: 1/90 sec
Aperture: f/16.0
ISO: 200
Zoom (Focal length): 400mm (640mm equiv.)*
Exposure bias: +0.0 EV
Original image size: 3072 x 2048 Pixels
Flash used: No
Date picture was taken: 03/06/2004 (Sat)
Time picture was taken: 7:06 PM
Camera make: Canon
Camera model: Canon EOS D60
James |
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make sure you meter on the moon, if using another mode besides manual. |
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04/06/2004 01:34:47 AM · #9 |
The sunny f16 rule applies to the moon (sunlit object). As a guide, start with f16 and 1/ISO (or as close as you can get) for shutter speed.
If you've got ISO=100 then try f16 and 1/125.
Message edited by author 2004-04-06 01:34:59. |
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04/06/2004 01:49:16 AM · #10 |
| I'm confused. The moon is supposed to look bigger just above the horizon. So you're saying its smaller? That seems odd. I've thought of doing this myself, it seems a simple way to settle the question, but never think of it at the right times... |
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04/06/2004 02:14:43 AM · #11 |
Heres my setting for moon shots and the result.
Exposure: f/5.6, 1/200 seconds, iso 100, using a 1.4X convertor with the 70mm-200mm f/4L lens, giving an effective focal length of 448mm, when used with the 300D.
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04/06/2004 04:11:03 AM · #12 |
Originally posted by ScottK:
I'm confused. The moon is supposed to look bigger just above the horizon. So you're saying its smaller? That seems odd. I've thought of doing this myself, it seems a simple way to settle the question, but never think of it at the right times... |
Hi folks,
Let me try to help on this one. You can find a nice pic and explanation at Nasa APOD website wich deals with this issue. You can find a lot of interesting astro shoots there too (one a day, actually ;) Worth browsing.
Carlos.
PS: It's not me who shoot this pic, I've never been in Seattle :-D
Message edited by author 2004-04-06 04:15:41. |
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04/06/2004 07:54:03 AM · #13 |
At dusk, all thru April, you can see with the naked eye, four other planets aligned with the moon. Anyone take a pic yet?
I managed to get 3 of them.
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04/06/2004 08:12:32 AM · #14 |
Originally posted by ScottK:
I'm confused. The moon is supposed to look bigger just above the horizon. So you're saying its smaller? That seems odd. I've thought of doing this myself, it seems a simple way to settle the question, but never think of it at the right times... |
The moon is pretty much the same size at any point of the cycle. It will look slightly flattened at the horizon due to temperature invertions, which refract the light. This same sort of distortion happens to the sun and also causes mirages. You can see this oblate moon in Jab's picture above of the orange flattened disk.
There is a well known illusion that makes the moon appear much larger at horizon than it does at zenith, but this is apparently not very well explained - however it is purely an optical illusion. It is potentially due to the proximity to the horizon - which we know is far away, hence things near it appear larger than at zenith. In fact, the moon is slightly further away from the earth when at the horizon than it is at its peak.
A good book on this subject and many other sky features is 'Out of the Blue: a 24 hour skywatchers guide' by Naylor |
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04/06/2004 08:16:49 AM · #15 |
| if it's an optical illusion, and the eye see's it...why does the camera pick up something different??? |
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04/06/2004 08:21:39 AM · #16 |
Originally posted by deapee:
if it's an optical illusion, and the eye see's it...why does the camera pick up something different??? |
Because an optical illusion is in your head, not in front of your eye. It happens because of how you percieve what you are seeing, not because what you are seeing is different.
The slight distortion that is shown in the overlayed images above is actually due to something else - atmospheric distortion. But the apparent large difference in size from moonrise to zenith is all due to perception.
Message edited by author 2004-04-06 08:23:07. |
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04/06/2004 08:33:55 AM · #17 |
In fact, surely, the moon is slightly further away from you, rather than from Earth, when at the horizon ... obviously, it's always at it's peak from some point on earth.
E
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04/06/2004 08:53:04 AM · #18 |
Originally posted by e301:
In fact, surely, the moon is slightly further away from you, rather than from Earth, when at the horizon ... obviously, it's always at it's peak from some point on earth.
E |
Yup, that's true - it gets closer to you, as the earth rotates through a quarter turn, by about 6000km or so. |
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