Star Trails (night exposure) - Page 3

Star Trails (night exposure) · Posted by **Marc Langille**, 10-23-2009, 09:19 PM

Just one!

Star Tracks over Chimney Rock, Capitol Reef National Park. Last night of the second workshop in September. Having a bright half moon in the sky made all the difference...

Total exposure time was 14 minutes, 25 seconds, F/7.1. Link to EXIF

Regards,
Marc

**Marc Langille** · 10-27-2009, 09:16 PM

Originally Posted by Eruditass

So you're saying you have a lot of room for error - you just adjust levels and WB in PP?

Well, how do you decide 14 mins vs 5 min vs 30 mins?

(Has never done long bulb mode before)

Exposure, not a lot of latitude, perhaps 1.5 stops. WB in PP is via ACR - I simply lowered the temps from 4450K to 3400K and the magenta cast disappeared. I learned something from this discovery since I'm relatively new to night time exposures and the color cast issue.

Regarding the time elapsed: I estimated around 14 - 16 minutes, based on the light from the moon, but definitely a lower aperture setting. I was using base ISO of 100.

Hope that helps?

Regards,
Marc

Eruditass · 10-27-2009, 10:16 PM

Thanks, it does help - so I will have to get good at reading light with my eyes?

1.5 stops is nice at that shutter speed... so your latitude is from 9.1 minutes to 25.5 minutes (if 15 mins is in the middle without applying what you said about aperture)?

*Jimbo* · 10-27-2009, 10:40 PM

I know Jim, but I still felt bad that you missed out. However, the second workshop weekend was almost nothing but blue skies forever - no clouds... In that aspect I consider the 1st group's outing much, much better - awesome cloud formations all the time!

Onhe thing you must remember about the work shop. The images were the bonus. The rest was what the adventure was all about. JIM

netuser · 10-28-2009, 06:54 AM

Marc and Guys, try to have a workshop in the Azores that I will help with all the logistics and "I will supply the perfect weather conditions every day", meaning the four seasons everyday

**Marc Langille** · 10-28-2009, 12:01 PM

Originally Posted by Eruditass

Thanks, it does help - so I will have to get good at reading light with my eyes?

1.5 stops is nice at that shutter speed... so your latitude is from 9.1 minutes to 25.5 minutes (if 15 mins is in the middle without applying what you said about aperture)?

Glad to help and I think if you run in that ballpark of 15 minutes or so with a larger aperture, it should be fine. I believe what ultimately decides your exposure time is the length of the star trails - it could last several hours, but be sure your batteries are freshly charged!!

Regards,
Marc

**Marc Langille** · 10-28-2009, 12:07 PM

Originally Posted by netuser

Marc and Guys, try to have a workshop in the Azores that I will help with all the logistics and "I will supply the perfect weather conditions every day", meaning the four seasons everyday

Having seen the beauty of the Azores through TV, I'd consider going. I know there are some beautiful landscapes and seascapes there! Please PM me if you think there might be interest with local folks too.

Regards,
Marc

**Marc Langille** · 10-28-2009, 12:07 PM

Originally Posted by Jimbo

Onhe thing you must remember about the work shop. The images were the bonus. The rest was what the adventure was all about. JIM

Indeed it was Jim!

netuser · 10-28-2009, 02:07 PM

Originally Posted by Marc Langille

Having seen the beauty of the Azores through TV, I'd consider going. I know there are some beautiful landscapes and seascapes there! Please PM me if you think there might be interest with local folks too.

Regards,
Marc

When I get back home (I'm travelling a few more days) I will check with the local photography club and we will see

Edit: Until now we had some other workshops, "problem is" is always with people from the Portuguese National Geographic that use nikon or canon

since almost everyone uses "canikons"

.

Andres · 10-28-2009, 06:14 PM

Amazing! Stars at a day sky!!!!!

**Marc Langille** · 10-30-2009, 03:10 AM

Originally Posted by netuser

When I get back home (I'm travelling a few more days) I will check with the local photography club and we will see

Edit: Until now we had some other workshops, "problem is" is always with people from the Portuguese National Geographic that use nikon or canon since almost everyone uses "canikons" .

Most of the classes I've taught where primarily shooting Canon - it makes no difference to me. It's the image that matters...

**Marc Langille** · 11-15-2009, 04:53 PM

Originally Posted by Andres

Amazing! Stars at a day sky!!!!!

Thanks Andres - appreciate the kind words!

Regards,
Marc