September 03, 2014, 03:46:34 AM

Author Topic: first try on stars and milky way - any unedited shot samples?  (Read 4447 times)

Drizzt321

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #15 on: September 19, 2013, 04:34:59 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.
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Re: first try on stars and milky way - any unedited shot samples?
« Reply #15 on: September 19, 2013, 04:34:59 PM »

cayenne

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #16 on: September 19, 2013, 04:55:25 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.

Can you expand on this last part you posted? How do you take a picture and not open the shutter? How do you subtract it?

Thanks in advance!!

C

Drizzt321

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #17 on: September 19, 2013, 04:59:02 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.

Can you expand on this last part you posted? How do you take a picture and not open the shutter? How do you subtract it?

Thanks in advance!!

C

Canon calls this Long exp. noise reduction (I believe). Just turn it on, and the camera should automatically do it for you. The LCD will just say "wait" or something like that after you hear the shutter close at the end of the exposure.

You can do it manually yourself, although you'll need to just put the lens cap over the lens in order to capture that 2nd frame. The technique is called Dark Field Subtraction. You can google it if you like to read more.

EDIT: This seems to be a pretty decent description complete with sample images and workflow if you want to do it yourself.
« Last Edit: September 19, 2013, 05:01:20 PM by Drizzt321 »
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cayenne

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #18 on: September 19, 2013, 05:00:42 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.

Can you expand on this last part you posted? How do you take a picture and not open the shutter? How do you subtract it?

Thanks in advance!!

C

Canon calls this Long exp. noise reduction (I believe). Just turn it on, and the camera should automatically do it for you. The LCD will just say "wait" or something like that after you hear the shutter close at the end of the exposure.

You can do it manually yourself, although you'll need to just put the lens cap over the lens in order to capture that 2nd frame. The technique is called Dark Field Subtraction. You can google it if you like to read more.

Wow..interesting!! I learn something new every day!!
:)

I'll give this a google and some reading..thanx for the info!!

C

Drizzt321

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #19 on: September 19, 2013, 05:02:17 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.

Can you expand on this last part you posted? How do you take a picture and not open the shutter? How do you subtract it?

Thanks in advance!!

C

Canon calls this Long exp. noise reduction (I believe). Just turn it on, and the camera should automatically do it for you. The LCD will just say "wait" or something like that after you hear the shutter close at the end of the exposure.

You can do it manually yourself, although you'll need to just put the lens cap over the lens in order to capture that 2nd frame. The technique is called Dark Field Subtraction. You can google it if you like to read more.

Wow..interesting!! I learn something new every day!!
:)

I'll give this a google and some reading..thanx for the info!!

C

In case you missed it, check out the link from my previous comment, http://photo.net/learn/dark_noise/.
5D mark 2, 5D mark 3, EF 17-40mm f/4L,  EF 24-105mm f/4L IS USM, EF 135mm f/2L, EF 85mm f/1.8
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arioch82

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #20 on: September 19, 2013, 06:40:42 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.

Hi Drizzt321,

I have a manfrotto 055CXPro3 with an Acratech ultimate ballhead, never tried exposures that long but i think i should be fine?

That link about the long exposure noise reduction seems like a great read, thanks!
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emag

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #21 on: September 19, 2013, 07:25:41 PM »
With my 60D or astro-modified 40D, I find I can manually focus using a bright star and 10x magnification in LiveView.  At Joshua Tree you should also be able to get some wonderful time lapses.  My biggest blunders included not realizing I'd moved the focus ring and shooting a wonderfully OOF sequence. I *can't* recommend that! 20-30 seconds at 1600ISO should work fine as a starting point.  If you're taking individual shots, long exposure noise reduction can help, but it eats up valuable dark sky time.  Be sure to post some of your images after your trip!  (meaning....I'm really interested in how that RokSamBow 14mm performs.  I have the Tokina 11-16, but that lens interests me.)

FWIW, these are a couple of guides I threw together for my astronomy club friends, for some simple prettification of astro images.  More for telephoto/telescope shots but I've used them for wide field shots in more light polluted areas.  Here is a sample of the difference taken 10 years ago on like the third day after I bought a Digital Rebel (300D).

Before:     http://www.pbase.com/emagowan/image/21459259
After:      http://www.pbase.com/image/21459102

http://www.pbase.com/emagowan/processing

http://www.pbase.com/emagowan/processing_with_gimp
« Last Edit: September 19, 2013, 07:30:07 PM by emag »

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #21 on: September 19, 2013, 07:25:41 PM »

Drizzt321

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #22 on: September 19, 2013, 07:27:22 PM »
Didn't read all the comments in detail, but you will also need a good, sturdy tripod and a remote shutter release if you're going to go longer than 30s exposure.

Sturdy tripod is self-explanitory. You don't have to spend $1500 (unless you want to), and you can always rent.

Remote shutter release is needed because I believe the maximum time for Canon is 30s exposures. If you want longer, you need to use Bulb mode, which means you need to hold down the shutter button. Not ideal, however most/all wired remote shutter will have a 'lock' which lets you keep it open without needing to hold the button down. Or if you get one of the fancier ones it'll allow for an appropriate time without you need to release the button after counting using your watch.

Last, use Mirror Lockup, and ideally the long exposure subtraction which will take a 2nd shot of the same length but without opening the shutter in order to subtract generated noise from the exposed image. Of course, it'll be 2x the length of time.

Hi Drizzt321,

I have a manfrotto 055CXPro3 with an Acratech ultimate ballhead, never tried exposures that long but i think i should be fine?

That link about the long exposure noise reduction seems like a great read, thanks!

I'd say that's probably a pretty sturdy tripod, unless you overload it of course. You can also hang a small weight/bag so that it's putting most of the weight on the tripod in order to help dampen out any vibrations from wind. Don't know if there's a small hook on the bottom of the center column like there is on my Benro, but you can always rig up a something from the a piece of string/rope to something that has some decent weight.

If you don't want to go to that trouble, you'll almost certainly be find unless you have a strong and/or gusting wind conditions.
5D mark 2, 5D mark 3, EF 17-40mm f/4L,  EF 24-105mm f/4L IS USM, EF 135mm f/2L, EF 85mm f/1.8
Film Cameras: Mamiya RB67, RB-50, RB-180-C, RB-90-C, RB-50, Perkeo I folder, Mamiya Six Folder (Pre-WWII model)
http://www.aaronbaff.com

emag

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #23 on: September 19, 2013, 07:33:32 PM »
Regarding remote shutter release or timer remote, you could install Magic Lantern and have that capability without additional hardware.

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Re: first try on stars and milky way - any unedited shot samples?
« Reply #23 on: September 19, 2013, 07:33:32 PM »