Nighttime airport

Foxx

TPF Noob!
Joined
Jul 28, 2011
Messages
255
Reaction score
44
Location
Atlanta, Georgia
Can others edit my Photos
Photos OK to edit
let_there_be_light_by_pianoblack97-d4ox2mq.jpg


Is there any way I can keep star trails from forming other than upping my ISO/using a wider aperture?

Also any other C&C is appreciated
 

timphotos

TPF Noob!
Joined
Feb 8, 2012
Messages
28
Reaction score
0
Location
Portland, Or
Can others edit my Photos
Photos OK to edit
Cool photo! I know some address star trails via photoshopping... But I gather your not wanting to edit?
 

FRK

TPF Noob!
Joined
Feb 12, 2012
Messages
1
Reaction score
0
Location
Australia
Can others edit my Photos
Photos OK to edit
Definitely a cool photo, I can hardly notice the grain on the photo from the ISO, what settings did you use?
 

SCraig

Been spending a lot of time on here!
Joined
Nov 12, 2011
Messages
6,474
Reaction score
2,450
Location
Nashville, TN
Website
sc-photo-tn.com
Can others edit my Photos
Photos NOT OK to edit
Is there any way I can keep star trails from forming other than upping my ISO/using a wider aperture?

Also any other C&C is appreciated
Not with a 20 second exposure. The Earth moves and causes the star trails. It's amazing how much it actually does move in a short period of time but the star trails point it out clearly.
 
OP
Foxx

Foxx

TPF Noob!
Joined
Jul 28, 2011
Messages
255
Reaction score
44
Location
Atlanta, Georgia
Can others edit my Photos
Photos OK to edit
Great shot, but where's the airport?!

My friend is standing on the end of the runway, I was setup on the hillside slightly below it. The lighting is coming from a tower on the opposite end of the runway.
 

Compaq

Been spending a lot of time on here!
Joined
Aug 29, 2010
Messages
3,398
Reaction score
657
Location
Norway
Can others edit my Photos
Photos OK to edit
I've visited this thread frequently this day, and that image still won't load!!! :gah:


What you need to escape star trails is simply a faster shutter speed. Also, keep in mind that stars trail "faster" on longer focal lengths. A star moves across the frame four times as fast on 40mm than on 10mm. Another thing to remember is that the stars appear to move around the north star. Stars close to this star moves "slower", and stars longer away move "faster". So, with that in mind, check which part of the sky you're shooting, and at which focal length, in addition to your normal exposure :)
 
Last edited:

Patrice

No longer a newbie, moving up!
Joined
Dec 6, 2006
Messages
2,392
Reaction score
381
Location
Campbellton, New Brunswick, Canada
You can calculate how fast your shutter needs to be to avoid star trails. The earth rotates 15 arc degrees in one hour. This means that a star will rotate around the north star at a rate of 15 arc seconds in every second of time. The arc length of that movement is dependant on how far away from the north star the object star is. The lens you use has a field of view stated in degrees which can be converted to any other circular measurement so its easy enough for you to figure out how many units of circular measure are covered by each pixel of your sensor. As you've noticed by now this is dependant on focal length of the lens. Your shutter speed needs to be such that the arc length of the star's movement does not go across more that just a few pixels. The amount of pixels is determined by the image viewing distance and enlargement.
 

manaheim

Jedi Bunnywabbit
Staff member
Supporting Member
Joined
Sep 2, 2005
Messages
14,435
Reaction score
3,312
Can others edit my Photos
Photos OK to edit
I've no clue of the answer to your question, but the shot is very neat. :)
 

Most reactions

New Topics

Top