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FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 15 Mar 2011 (Tuesday) 20:11
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Fake Moon shot?

 
xclusix
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Mar 15, 2011 20:11 |  #1

Hey guys, i was just wondering, this guy i know claims to have taken this image last night (March 14th):

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But, this image i think shows the current wrong phase for Mexico am i right?

He also claims that it was shot with a 70-200 + 2x converter wide open...is that level of detail possible on a 50D?

Thanks!



  
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nebula_42
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Mar 15, 2011 23:33 |  #2

Moon phases are the same all over the world on the same night. With a 200mm and 2X on a crop body, he's at 640mm. Not a real lot of magnification for the moon. The moon's image on the sensor plane would be about 6mm diameter, but he could have cropped it a lot. I would guess it's been sharpened quite a bit. Looks entirely doable to me. Nice shot.


San Diego, CA

all the usual stuff :)

  
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xclusix
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Mar 16, 2011 01:59 |  #3

He gave me his permission to post it here, this had to be done on tripod and about F/8.0 right? lowest ISO possible...? thanks...




  
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martyn_bannister
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Mar 16, 2011 02:19 |  #4

xclusix wrote in post #12027839 (external link)
Hey guys, i was just wondering, this guy i know claims to have taken this image last night (March 14th):

IMAGE NOT FOUND
HTTP response: NOT FOUND | MIME changed to 'image/png'


Uploaded with ImageShack.us (external link)

But, this image i think shows the current wrong phase for Mexico am i right?

He also claims that it was shot with a 70-200 + 2x converter wide open...is that level of detail possible on a 50D?

Thanks!

Very sharp for a zoom + TC on a APS-C body, even allowing for PP.

If in any doubt, just start up Stellarium and plug in your mexican friend's location. Have a look at the moon for the date and time in question. See what he would have seen. Simple :)




  
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hollis_f
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Mar 16, 2011 07:39 |  #5

xclusix wrote in post #12029403 (external link)
He gave me his permission to post it here, this had to be done on tripod and about F/8.0 right? lowest ISO possible...? thanks...

It's spot on for the correct phase, and I can't see anything that would suggest it's not genuine.

Get him to post the image with the exif data intact. That will show camera model, lens, date, exposure settings.


The only problem is that it's upside-down:D

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hagz
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Mar 16, 2011 14:22 |  #6

here is one i took a couple of nights ago with a 70-300 no extension tube or anything else on my eos 60d

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Canon EOS 60d, Tamron SP 70-300mm F4-5.6 Di VC USD, Canon EF-S 17-85mm f/4-5.6 IS USM, Whats next??? a nice prime with a wide aperture.

  
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hagz
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Mar 16, 2011 14:23 |  #7

not quite as sharp but it was my first attempt and it is blown up a little


Canon EOS 60d, Tamron SP 70-300mm F4-5.6 Di VC USD, Canon EF-S 17-85mm f/4-5.6 IS USM, Whats next??? a nice prime with a wide aperture.

  
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martyn_bannister
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Mar 16, 2011 17:00 as a reply to  @ hagz's post |  #8

Taken tonight using Canon 10D mounted prime focus on 130mm reflector, stacked 17 images and sharpened unmercifully.

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xclusix
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Mar 16, 2011 19:22 |  #9

Well i guess ill never know, the 60D+70-300 shot is impressive as well...this guy wont provide RAW image, PP method and the jpeg given has no EXIF...so... ill have to belive him. Thanks you all!

PS. i tried it on my 7D with a 300F4 and i just cant get that much detail without stacking...i dont know how to do that BTW...




  
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hagz
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Mar 17, 2011 02:43 |  #10

if you ask me the 50d is shot is extremely sharp i did a bit of an experiment and sharpened my image in it's max resolution and then cropped it it does look sharper but not that sharp lol.

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martyn_bannister
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Mar 17, 2011 03:01 as a reply to  @ hagz's post |  #11

I think the "seeing" has a lot to do with how sharp an image results. No doubt in Mexico the seeing is a lot better than the south of UK :)




  
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xclusix
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Mar 17, 2011 20:05 |  #12

No no i did some tests and with a 300 and 1.4x at f8 on tripod ISO 100 and lots of PP my image is not that sharp... I cant just belive him... Any good PP method you know? What i do is no NR raw from DPP then little sharpening, into PS. In PS CS5 i do levels layer select aplly, crop and then USM for overall contrast. Then on a new layer high pass filter and mask over where i want it sharper with hard light blending mode... Is that any good?




  
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martyn_bannister
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Mar 18, 2011 01:53 |  #13

Well, the answer is, if you can't quite believe the first shot is real, ask for another :) If your friend can produce on demand, they must be kosha.




  
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tonylong
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Mar 18, 2011 02:01 |  #14

What exactly are you questioning? I've seen some pretty good shots using a 70-200 with a 2x TC, and it's true that the moon can take some pretty aggressive sharpening.

Are you questioning thinking the guy used a better lens for this?


Tony
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hagz
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Mar 18, 2011 10:33 |  #15

xclusix wrote in post #12040863 (external link)
No no i did some tests and with a 300 and 1.4x at f8 on tripod ISO 100 and lots of PP my image is not that sharp... I cant just belive him... Any good PP method you know? What i do is no NR raw from DPP then little sharpening, into PS. In PS CS5 i do levels layer select aplly, crop and then USM for overall contrast. Then on a new layer high pass filter and mask over where i want it sharper with hard light blending mode... Is that any good?

wow thats a lot of PP i just took the shot cropped it adjusted the exposure settings then sharpened a little could be why mine i snot so sharp.


Canon EOS 60d, Tamron SP 70-300mm F4-5.6 Di VC USD, Canon EF-S 17-85mm f/4-5.6 IS USM, Whats next??? a nice prime with a wide aperture.

  
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Fake Moon shot?
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