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06/25/2011 07:51:05 PM · #26 |
There are sure alot of contradicting advice out there!
I will try the short shots and see how I get on. Thanks for the advice, I will post my results on here soon!
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06/25/2011 07:52:38 PM · #27 |
Originally posted by supanova:
There are sure alot of contradicting advice out there!
I will try the short shots and see how I get on. Thanks for the advice, I will post my results on here soon! |
No matter what type of photography or editing you do, there will always be conflicting advice. The trick is to listen to all of it, try what you want and see what works best for you.
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06/26/2011 12:44:31 AM · #28 |
| Judi, Im having conflicting thoughts about your advice ;) |
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06/26/2011 07:57:26 AM · #29 |
Originally posted by Judi:
Originally posted by supanova:
Originally posted by sarampo:
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 sarampo Why is there a gap in the trails, did you miss an exposure?
I tried to take some pictures of star trails last night, I should have read this thread first as they are a bit wrong.
I have a cable shutter and left it on for 10-20 mins, the first exposure was pretty cool, so i left it on for longer but it came out over exposed. I guess the way around this is to do shorter exposures and stack them.
What is the ideal ISO?
Do you need to toggle with the exposure compensation?
Do you keep colour setting as standard or vivid or something else in camera?
The only other problem I had is condensation/dew on the lense, Any one know what can be done about this (I am in southern Hem and it is winter now)?
Thanks
Caz |
ISO - 100 (Crucial...you DON'T want noise).
Aperture- about 5.6 to 8 depending on how much ambient light is available.
Standard settings (I don't change to vivid or comparable options on Canons)
Southern hemisphere also but I don't have the dew issues. Somebody else can help you here. Although on cold nights keep spare batteries in bra to keep them warm.
Shooting over water will double the amount of light in your image. Think of it as a big reflector. (so cut the light via your other settings if you want the longer time frame)
Don't allow the moon to creep into your frame.
Do have some moon as on black nights I have done 30 min photos and it stays black even with all the stars in the sky(these shots were done 60kms from nearest town so no ambient light around)
I do not stack so I can't help you there. |
Hi Caz, sorry for the late reply, but it's a huge timezone difference :)
I did get a gap in the exposure, but I didn't realize how much.
What happened is that the buffer of the camera was full, I think after 100 and something exposures, so the camera stopped taking photos, and I didn't notice how long had it been stopped.
Regarding your question, I'll do a (very) stupid comparison: would you like to photograph lions in a zoo or in the wild? Stacking photos is the easier, but there's no feeling like waiting for 3 hours and get a perfect exposure :)
Stacked exposures is the safest, most versatile way to do star trails. You can control every single bit of light, you can compose, adjust exposure, etc, on a 30 seconds exposure.
Also, since the exposure is shorter, you can really punch the ISO and open the aperture, so you can capture even more stars, that you wouldn't be able to do on a single exposure, since when you do this you sacrifice a bit the aperture, hence not so many stars will be visible.
Also, you don't end up after 2 or 3 hours and realize you messed up the aperture :P
There are downsides, of course. Camera buffer being one, also card space, so for star trails usually jpg is advised.
Also, you can't submit a photo like this for DPC (although I rather have a great picture even if not submittable).
The plus side is that even if something happens while taking the picture (a car go by, an unwanted light source, etc), if you keep your exposures with 30s or less you can just simply throw away that frame, that it won't make that much of a difference. Also, you can use dark frames (usually taken with the lens cap on, to reduce the noise from high ISO).
There are no magic formulas unfortunately to get the exposure right in a one-frame star trails.
Even the same location can yield different results each time.
On a pitch black night, no moon, not so much ambiance light, usually I can get away with f/6.3 to f/7, around 200 ISO. If you're near a town, then you will have a yellowish glow from the city lights.
Just check william88's profile, he has some amazing work, and although the locations will not be the same, you can check some of his settings.
Hope it helps,
Joao
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06/26/2011 09:25:53 AM · #30 |
Originally posted by Judi:
...... Although on cold nights keep spare batteries in bra to keep them warm. |
...and where am I supposed to.......(nevermind) |
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