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Long-exposure eclipse shot
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PostPosted: Mon Sep 28, 2015 7:50 pm    Post subject: Long-exposure eclipse shot Reply with quote
~3.5 hours, from Boston's Zakim Bridge.



PostPosted: Mon Sep 28, 2015 7:52 pm    Post subject: Reply with quote
I absolutely love it!


PostPosted: Mon Sep 28, 2015 8:31 pm    Post subject: Reply with quote
Very cool!


PostPosted: Mon Sep 28, 2015 8:31 pm    Post subject: Reply with quote
Like Dog


PostPosted: Mon Sep 28, 2015 9:20 pm    Post subject: Reply with quote
Like 1


PostPosted: Mon Sep 28, 2015 9:27 pm    Post subject: Reply with quote
Stunning shot, well thought out and excecuted. Like 1


PostPosted: Mon Sep 28, 2015 9:36 pm    Post subject: Reply with quote
Whoo Turtle


PostPosted: Mon Sep 28, 2015 11:02 pm    Post subject: Reply with quote
Happy Dog
Fantastic!

What's the bright spot in the sky on the other side of the bridge support? It must be something local as a star or planet would have moved considerably in 3½ hours.


PostPosted: Mon Sep 28, 2015 11:21 pm    Post subject: Reply with quote
Like Dog

Great composition! Nice to see the Bunker Hill Bridge too!
(I lived in Boston before moving to the Southwest.)


PostPosted: Mon Sep 28, 2015 11:40 pm    Post subject: Reply with quote
Apocalyptic!


PostPosted: Tue Sep 29, 2015 12:16 am    Post subject: Reply with quote
Awesome!
This is the most unique eclipse shot I have seen.
Pete


PostPosted: Tue Sep 29, 2015 1:17 am    Post subject: Reply with quote
This is such a great way to show the progression of the eclipse - never seen this before - fantasitc!


PostPosted: Tue Sep 29, 2015 1:40 am    Post subject: Reply with quote
DConvert wrote:
Happy Dog
Fantastic!

What's the bright spot in the sky on the other side of the bridge support? It must be something local as a star or planet would have moved considerably in 3½ hours.


I looked closely and it's there in all of my frames. It seems to be a piece of the lens flare.


PostPosted: Tue Sep 29, 2015 7:56 am    Post subject: Reply with quote
That's great!!!! Very Happy

What were the parameters on the shot? F stop, etc?

And was it one exposure or a series of exposures combined?


PostPosted: Tue Sep 29, 2015 10:25 am    Post subject: Reply with quote
Unique shot, very well done Like 1 small


PostPosted: Tue Sep 29, 2015 1:51 pm    Post subject: Reply with quote
dnas wrote:
That's great!!!! Very Happy

What were the parameters on the shot? F stop, etc?

And was it one exposure or a series of exposures combined?


320 exposures of 2 seconds with 30 second intervals. I don't remember what f-stop but usually these exact numbers don't matter much for this kind of shot; just turn it up and down until you like what you see Wink


PostPosted: Tue Sep 29, 2015 10:04 pm    Post subject: Reply with quote
wuxiekeji wrote:
dnas wrote:
That's great!!!! Very Happy

What were the parameters on the shot? F stop, etc?

And was it one exposure or a series of exposures combined?


320 exposures of 2 seconds with 30 second intervals. I don't remember what f-stop but usually these exact numbers don't matter much for this kind of shot; just turn it up and down until you like what you see Wink


Nice!!!! Very Happy


PostPosted: Wed Sep 30, 2015 10:58 am    Post subject: Reply with quote
This is Awesome!!
what lens you use?


PostPosted: Wed Sep 30, 2015 12:08 pm    Post subject: Reply with quote
What a great concept and great image!

Makes me think of this though Very Happy



PostPosted: Wed Sep 30, 2015 5:12 pm    Post subject: Reply with quote
BeardsAreBest wrote:
This is Awesome!!
what lens you use?


Contax-Zeiss Distagon 4/18. For landscapes and long exposure shots like this though it won't matter too much whatever you use; I stopped it down significantly. Perhaps it would have been nice to have a lens with 7 blades instead of 6, but minor issue.


PostPosted: Thu Oct 01, 2015 11:15 am    Post subject: Reply with quote
Great shot! Very intriguing to see the progress of the eclipse!

How do you do a 3,5hr exposure?
I guess the shutter is not open voor the whole 3,5hr.


PostPosted: Sun Oct 04, 2015 4:24 am    Post subject: Reply with quote
chris_zeel wrote:
Great shot! Very intriguing to see the progress of the eclipse!

How do you do a 3,5hr exposure?
I guess the shutter is not open voor the whole 3,5hr.


You can open the shutter for 3.5 hours, but not for this kind of image.

This shot is not a 3.5 hour continuous exposure; it is a stacking of 320 individual 2-second exposures with 30-second intervals. The stacking is taking the max() function at every pixel (max over the 320 images) instead of simple addition, otherwise you would get a washed out image due to background light from the city.


PostPosted: Sun Oct 04, 2015 8:38 pm    Post subject: Reply with quote
Thanks for sharing the details on your shot, sounds very understandable.

I assume you had a programmed protocol to released the shutter every 30 seconds, and did not do it yourself for the whole 3,5 hrs?


PostPosted: Mon Oct 05, 2015 4:12 pm    Post subject: Reply with quote
chris_zeel wrote:
Thanks for sharing the details on your shot, sounds very understandable.

I assume you had a programmed protocol to released the shutter every 30 seconds, and did not do it yourself for the whole 3,5 hrs?


There are many ways to this.
- Some cameras support it out of the factory
- Use modified firmware (e.g. Magic Lantern for Canon)
- A microcontroller-based solution (e.g. USB battery pack + Arduino + optocoupler + shutter release cable, and maybe a HC-06 bluetooth module so you can talk to it with your phone, and write an app for your phone)
- Packaged time-lapse solutions (there's a Kickstarter called Pico that looks promising)
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