Why there is double image when shooting moon ?


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jerahteo

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Jul 1, 2008
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#1
Noticed it was full moon tonight and decided to take a shot of the moon, but strangely I saw double image when I zoom in to 200mm using my Sigma Tele lens. I also tried with my Canon 450D kits len it also show the same problem.

I shoot in bulb mode @ F22 , set to landscape mode.

Can somebody explain to me why I see two moon , thank you.

Taken with Canon kit lens @ 55mm zoom level


Taken with my Sigma 18-200 lens and @ 200 zoom level.
 

jerahteo

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Jul 1, 2008
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#3
Sun & Moon?! :bigeyes:
I am kidding. I don't know also.
When I don;t zoom I will not see two images only one white dot but when I zoom in to 200mm or 55mm then this strange thing happen.

I am not kidding really happen to me.
 

synapseman

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May 6, 2003
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#4
Looks like internal reflection. Small aperture used, so the image of the reflected moon is quite sharp.

Were you using a filter? It's probably not a multi-coated one, I'm guessing.
 

jerahteo

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Jul 1, 2008
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#5
Looks like internal reflection. Small aperture used, so the image of the reflected moon is quite sharp.

Were you using a filter? It's probably not a multi-coated one, I'm guessing.
Hmm may be that could be the reason why , ok thanks will try again another day.
 

Jul 14, 2007
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#6
Dont wait another day!
Its almost full moon tonight!
Funny, I dont use bulb mode ever, in fact high shutter speed for my moon shots, at 300mm zoom.
 

yemaboi

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Feb 28, 2007
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#7
how long did you have the shutter open for? normally, you'd like to keep shutter speeds of 100-125 for taking photos of moon :)
 

ah.zeep

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Jun 20, 2006
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#8
how long did you have the shutter open for? normally, you'd like to keep shutter speeds of 100-125 for taking photos of moon :)
To be clearer: shutter speeds of 1/100s - 1/125s :) Not 100-125s.
 

Jul 14, 2007
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#9
how long did you have the shutter open for? normally, you'd like to keep shutter speeds of 100-125 for taking photos of moon :)

Camera: Nikon D40
Exposure: 0.003 sec (1/320)
Aperture: f/5.6
Focal Length: 300 mm [SIGMA 70-300mm]
ISO Speed: 400


Exposure: 0.025 sec (1/40)
Aperture: f/5.6
Focal Length: 300 mm


Pardon me TS, I'm here to share mine. Hope it helps!
 

parampita

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Jun 25, 2008
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昭南島
#11
Taken less than 5 minutes ago. You don't need bulb. This is at f/8, shutter 1/80s. But I use tripod, just to be safe.
By the way, it's not full moon yet as you can see.

 

Jul 14, 2008
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Geylang
#12
I tried mine too based from chegu thamrin, just don't know how to paste:embrass:.
Should try fast shutter at 1/320 A at 2.7 , zoom at 15X (about 400mm) on H9.
Moon is rahter luminous, so a longer shutter time will overexpouse.
Coming back to your question I don't know why double take.
 

parampita

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Jun 25, 2008
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#13
I tried mine too based from chegu thamrin, just don't know how to paste:embrass:.
Should try fast shutter at 1/320 A at 2.7 , zoom at 15X (about 400mm) on H9.
Moon is rahter luminous, so a longer shutter time will overexpouse.
Coming back to your question I don't know why double take.
Not paste.. link from gallery ;)
 

tkbonz

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Dec 11, 2006
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#14
When I don;t zoom I will not see two images only one white dot but when I zoom in to 200mm or 55mm then this strange thing happen.

I am not kidding really happen to me.
I'm pretty sure its lens flare...cause when you're at 200mm or 55mm, the lens structure inside results in obvious flaring if you're pointing your lens directly at the bright object. Similar to "sun flares" when you shoot directly at the sun, cause the moon is bright, it results in this effect. When you aim perfectly straight at it, you might not see the additional image, but once tilted slightly, you can see how the additional image shifts in position. This usually happens on lenses which have poorer lens coating or because of the filter used.
 

jerahteo

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Jul 1, 2008
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#16
I'm pretty sure its lens flare...cause when you're at 200mm or 55mm, the lens structure inside results in obvious flaring if you're pointing your lens directly at the bright object. Similar to "sun flares" when you shoot directly at the sun, cause the moon is bright, it results in this effect. When you aim perfectly straight at it, you might not see the additional image, but once tilted slightly, you can see how the additional image shifts in position. This usually happens on lenses which have poorer lens coating or because of the filter used.
Yes I am using a cheapo monolux UV filter will try to remove it and see if it help.

But how are we going to get a sharp focus if we don't shoot straight at the moon. Also for metering what option should you use? Spot , Centre or partial metering.

Hope you all pro can give some advice. Very impressed that the texture of the moon can be captured with a DSLR camera.

Most of the Tele lens posted here is either 300 or 400 mm so if mine is only 300mm will I be able to capture similar details as posted sample here.
 

parampita

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Jun 25, 2008
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#17
Yes I am using a cheapo monolux UV filter will try to remove it and see if it help.

But how are we going to get a sharp focus if we don't shoot straight at the moon. Also for metering what option should you use? Spot , Centre or partial metering.

Hope you all pro can give some advice. Very impressed that the texture of the moon can be captured with a DSLR camera.

Most of the Tele lens posted here is either 300 or 400 mm so if mine is only 300mm will I be able to capture similar details as posted sample here.
For me, I use spot metering and shoot straight at the moon. I think tkbonz meant to shoot straight at it, not at a slight angle.

Pai seh... mine is not DSLR... mine is P&S only :sweat:
 

Havoc

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May 16, 2008
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#19
Just like to ask something else.
Is there a way to take a photo of the "SUN" ?
 

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