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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 04 May 2012 (Friday) 20:53
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Moon shots with foreground objects

 
Mark ­ II
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May 04, 2012 20:53 |  #1

Any tips as to the best method?

Tomorrow noight, I'm giving the super moon a go. Tired of the "Moon only" kinda shots. Would like to add some object(s) in the foreground but, where I live, its relatively flat (Southeast Texas).

If I can use an overpass as an elevation, I may be able to get something decent. I have visions of a highway with car lights trailing ... or maybe a lit up American flag. Would 1/125th sec. be too fast to get what I have invisioned?
Just how slow of a SS can one shoot the moon and still get a sharp shot with the earth & moon moving?

Any help in concepts .... or tips on foreground compostion "How to's" ... would be most appreciated.

Thanks in advance.


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Bernoulli
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May 04, 2012 21:11 |  #2

I did a little quick math.

The maximum open shutter time you can have before the Moon will show motion against foreground objects depends on your focal length. Longer FL's will require faster shutter speeds since the long lenses magnify everything, including motion.

I think this is right:

longest shutter speed to avoid Moon motion smear = 60/FL

So for 250 mm, you need to be faster than about 1/4 sec. At 55 mm you need to be faster than about 1 sec etc.

Hope that helps!


Rick
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Mark ­ II
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May 04, 2012 22:20 |  #3

Bernoulli wrote in post #14381462 (external link)
I did a little quick math.

The maximum open shutter time you can have before the Moon will show motion against foreground objects depends on your focal length. Longer FL's will require faster shutter speeds since the long lenses magnify everything, including motion.

I think this is right:

longest shutter speed to avoid Moon motion smear = 60/FL

So for 250 mm, you need to be faster than about 1/4 sec. At 55 mm you need to be faster than about 1 sec etc.

Hope that helps!

Still dumbfounded with all of the variables on my end.

I'm shooting with a 7D, 400 f/2.8 & 2XII multiplier.

Typically, I get sharp shots of the moon itself @ 1/125th. If I could drag it down to 1/30th, I'm thinking traffic motion would be somewhat desirable .... depending on the composition/angle.

Thanks for the math.
I guess the world just turns too fast! :confused:


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Bernoulli
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May 04, 2012 22:44 as a reply to  @ Mark II's post |  #4

You can do 1/30 sec with that lens. At 400 mm you can stay open as long as 1/8 sec before you start to get motion smear. And you'll have a nice big Moon in the frame! With the 2X attachment, the Moon will take almost the entire frame and you can stay open for about 1/16 sec at most.

Looking forward to seeing your pictures.


Rick
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Mark ­ II
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May 04, 2012 22:49 |  #5

Bernoulli wrote in post #14381863 (external link)
You can do 1/30 sec with that lens. At 400 mm you can stay open as long as 1/8 sec before you start to get motion smear. And you'll have a nice big Moon in the frame! With the 2X attachment, the Moon will take almost the entire frame and you can stay open for about 1/16 sec at most.

Looking forward to seeing your pictures.

Big thanks, Bern!
I'll start off @ 1/16th and go from there. ;) My concern then turns to the moon being over exposed. Guess, if that were to happen, ND filter wouldnt be the thing to use?

Here's one from last week using the kit mentioned above. Maybe a tad too much sharpening.


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Bernoulli
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May 05, 2012 00:11 as a reply to  @ Mark II's post |  #6

Your 400 f/2.8 is one of my dream lenses!

I've used my 400 f/5.6 on the Moon lots and, at 1/30 sec, you can get there at around f/10 or so. You probably won't need the ND filter. Put you ISO as low as it will go, you don't need the noise anyway.

You might try some HDR so you can see stuff in the foreground without blowing out the Moon.

And, yes, a little over sharpened.

Maybe we should have a big moon thread tomorrow?


Rick
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Celestron
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May 05, 2012 17:30 |  #7

Mark II wrote in post #14381385 (external link)
Any tips as to the best method?

Tomorrow noight, I'm giving the super moon a go. Tired of the "Moon only" kinda shots. Would like to add some object(s) in the foreground but, where I live, its relatively flat (Southeast Texas).

If I can use an overpass as an elevation, I may be able to get something decent. I have visions of a highway with car lights trailing ... or maybe a lit up American flag. Would 1/125th sec. be too fast to get what I have invisioned?
Just how slow of a SS can one shoot the moon and still get a sharp shot with the earth & moon moving?

Any help in concepts .... or tips on foreground compostion "How to's" ... would be most appreciated.

Thanks in advance.


I did a moonrise in 05' . Check out my image on my website : http://home.grandecom.​net/~r.hodges/moon.htm​l (external link)
Can't remember the exposure time but about the same as late evening shot just like maybe ISO400 for amybe 1320th-sec or 1/500th . Something in that area . You need to go out and do test shots and be ready ahead of time . Put your location in the slots on form "A" and see what time it rises for you .
http://aa.usno.navy.mi​l/data/docs/RS_OneDay.​php (external link)




  
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Mark ­ II
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May 05, 2012 18:13 as a reply to  @ Celestron's post |  #8

Tried some test shots around 5am this moring.

Found that the subject in the foreground has to be a LONG way away from camera to have any clear definition. I'm talking maybe a mile or more?

Will try a different spot at same time tomorrow morning. It sucks living in a land of flatness.


1DX7D - 40D IR converted Sony RX100,
Canon 85 L II, EF 70-200mm f/2.8L IS II, EF 24-105L, 16-35mm f/2.8 II L, 100L & 60mm Macro , Fisheye EF 15mm f2.8, Tokina 10-17

  
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Tdragone
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May 09, 2012 00:44 |  #9

I just found this from a friend; maybe food for thought for future moonrises? I love the Rio shot

http://www.boston.com …_the_perigee_mo​on_of.html (external link)


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Mark ­ II
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May 09, 2012 07:06 |  #10

Tdragone wrote in post #14402997 (external link)
I just found this from a friend; maybe food for thought for future moonrises? I love the Rio shot

http://www.boston.com …_the_perigee_mo​on_of.html (external link)

Thanks ... those are great! I'll be scouting out spots for next time.


1DX7D - 40D IR converted Sony RX100,
Canon 85 L II, EF 70-200mm f/2.8L IS II, EF 24-105L, 16-35mm f/2.8 II L, 100L & 60mm Macro , Fisheye EF 15mm f2.8, Tokina 10-17

  
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Celestron
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May 09, 2012 08:04 |  #11

Tdragone wrote in post #14402997 (external link)
I just found this from a friend; maybe food for thought for future moonrises? I love the Rio shot

http://www.boston.com …_the_perigee_mo​on_of.html (external link)

There was another member posted that same link a day or so ago . Nice picts tho .




  
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Moon shots with foreground objects
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