Getting a "moonrise" shot

TCampbell

Been spending a lot of time on here!
Joined
Mar 31, 2012
Messages
3,614
Reaction score
1,556
Location
Dearborn, MI
Can others edit my Photos
Photos OK to edit
This comes up "from time to time" so I thought I'd throw it out because tonight is that magical night.

When imaging a "full" moon rising over a landscape, cityscape, it's often better to take the image the night BEFORE the full moon and not the night "of" the full moon. By shooting the night before, the moon technically rises a little before sunset. As the sun sets and you're in the golden hour, the moon is low, seems larger (technically an illusion the moon does not change sizes near the horizon).

Tonight is the "day before" the full moon.

But the really important bit is that the sky will be dusky blue instead of black and that means you actually get better light on your foreground landscape/cityscape with some sky color beyond and a "full moon" (not technically because you're a day early) and the whole shot just looks a lot better.

If you do on the evening "of" the full moon then by the time the moon is high enough the sky is practically black and any foreground elements of interest have nearly no light on them -- and light from the moon itself would put those objects in silhouette.

If there's a specific landscape/cityscape you want to image and you want the moon to be located precisely in a specific spot (e.g. between two buildings... or over some specific mountain, etc.) while you can't move the moon or the landscape, you can stand in the right spot to get the moon to appear over the object of interest. To find that spot, there are a couple of apps or sites that can help.

You can use:
"Photographer's Ephemeris": The Photographer's Ephemeris
"Sun Surveyor": Sun Surveyor | Sun & Moon Position Visualization and Tracking App for iOS & Android

Both of these have apps that basically leverage Google maps, allow you to drop a pin on the spot where you want to stand and then draw the line showing the direction of the sun or moon, etc. at any time you want. You can move around to get the line pointing to the moon (for example) in the post you'd want it to be... then work backward to see where you'd need to be standing to get that shot.

Also... but less important... is this idea of a "super moon". A "super moon" is not an astronomy term. The astronomy term is "perigee moon". The "perigee" is the point during the lunar month where the moon is nearest to the Earth. The moon has an elliptical orbit. During the lunar month at one point it will be nearest to Earth (perigee) and another point it's farthest from Earth (apogee) -- regardless of whether or not it is "full".

The perigee moon occurs Sunday morning (Saturday night depending on where you live in the world.) But that puts tonight's moonrise within about 1 day of the perigee so the moon won't be substantially bigger tomorrow night than it is tonight. The perigee moon is only slightly closer and it makes the moon appear only about 10% bigger. The moon is fairly small (about 1/2º from edge to edge when measured as an angular dimension).

To make the moon look huge in relation to the foreground, you want to get very far away from your "foreground" and then use a VERY LONG LENS. The narrower angle of view on the long lens will make the moon occupy a larger area of the frame.

For example: If you use a 300mm lens on an APS-C camera body (I used 1.6x crop factor for the values I provide here. With a 1.5x crop-factor the moon would be just fractionally smaller (not really enough to notice), that will provide an "angular" field of view of about 4.3º horizontal by about 2.9º vertical dimension. The angular width of the moon TONIGHT is 33 arc-minutes (there are 60 arc-minutes in 1 degree) -- so just fractionally larger than a half degree (usually the moon is about 30 arc-minutes wide -- like I said... the moon won't seem much larger... just 10%). That makes the moon occupy about 1/8th of the frame horizontally and but just a tiny bit more than 1/5th by vertical dimension. If you then back up so far that buildings or mountains seem tiny (even with a 300mm lens attached) the size of the moon really won't change (you can't move on forward or backward enough to change the size of the moon and still be standing on Earth). This creates the illusion of a huge moon rising over the foreground.

Next month's full moon is August 10th so August 9 would be the better night to shoot it. That one, btw, will be a bit closer to the perigee at time of full moon and would technically be the largest full moon of the year.

As Neil DeGrasse Tyson points out... that's a "super moon" if you believe that when you got a 11" pizza but thought you were getting a 10" pizza that you got a "super pizza". ;-)

NOTE: You can look up the angular field of view dimensions using the calculator on this site: http://www.tawbaware.com/maxlyons/calc.htm
 
Last edited:
Thanks for the heads-up. Is there anything free I can go to that is as a good as The Photographer's Ephemeris? That used to be free.
 
Reminder: The 2014 "Super Moon" is coming up this Sunday. The "full" Perigee moon occurs at 2:10pm Eastern time (6:10pm UTC).

That means that Saturday the 9th and even Friday the 8th will be good evenings to try to capture the moon at moonrise while still having a blue sky. That gives us several days notice to check the weather forecast and find a suitable moon-rise site.
 
Thanks for the reminder Tim. I'll have to put a note in my phone to remind me to try Friday night and Saturday night. I will be in a new location for me to try and get shots, it should be fun.
 
I'm going to mention one lesson I learned the hard way: we on Earth are moving, and so's the moon. If you do too long of an exposure for your focal length, your picture of the moon will be ruined by motion blur. Like this one:

$moon.jpg
(the light smudge left of the moon is a comet)
 
Steve, that is certainly true for the new moon, with the difference between the bright and shadow sides. However, if shooting the full moon (or full moon less a day), you're dealing with a much smaller difference in dynamic range.
 

Most reactions

Back
Top