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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 11 Jan 2011 (Tuesday) 14:25
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Show us your setup and the final result!

 
dannybres
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Apr 07, 2013 02:22 |  #6496

Exif says it was a 1/100 shutter speed.... Is the EXIF incorrect?


EOS 7D, EOS M, EF-S 17-55mm f/2.8 IS USM, EF 70-200mm f/2.8L IS USM, 430EX II.

  
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lerroy
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Apr 07, 2013 03:24 |  #6497

^ yeah strange ...his setup shop says 15 seconds though :)


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Apr 07, 2013 07:45 as a reply to  @ lerroy's post |  #6498

There's a different shadow beneath the car in the setup shot and the final result. I would guess a mix of a few exposures for the background, sky, and car.


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Moose408
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Apr 07, 2013 23:41 |  #6499

The end result has flash. No flash in the setup shot. That would explain the difference. Kinda of useless as a setup shot however.


Canon 5DmkII | 24-105mm f/4.0L IS | 24-70mm f/2.8L | 17-40mm f/4L | 70-200mm f/2.8L IS | 100-400mm f/4.5-5.6L IS | 50mm f/1.8
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SteveInNZ
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Apr 08, 2013 00:03 |  #6500

He says that he walked around, manually popping the flash and the setup shows that the background scene requires about 15 seconds. Seems like a useful contribution to me.


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dexy101
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Apr 08, 2013 02:44 |  #6501

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dannybres
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Apr 08, 2013 04:33 |  #6502

Very nice, is that a 5D3 on the right?

looks exactly like a 7D, i didnt realise they were so similar! :)


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tpatana
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Apr 08, 2013 19:32 |  #6503

Dang those come out good. What's the filter? Settings on camera?


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dhanson
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Apr 08, 2013 19:51 |  #6504

Here's my cheapie astrophotography setup:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO


Results:

Jupiter, its moon Io (dot to the bottom right of the planet), and Io's shadow on the surface:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 403 | MIME changed to 'text/html'


Saturn in March:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 403 | MIME changed to 'text/html'


The Moon:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 403 | MIME changed to 'text/html'


Closeup of the moon with Apollo landing sites marked:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: 403 | MIME changed to 'text/html'

Canon 60D | EF-S 15-85 IS f3.5-5.6 USM | Tamron 17-50 f2.8 non-VC | EF 50mm f1.8 | EF-S 55-250mm f3.5-5.6 | 430 EXII

  
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Logic ­ 7
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Apr 08, 2013 19:53 |  #6505

Especially cool that you labled the Apollo landing sites!


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jdando
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Apr 08, 2013 20:33 |  #6506

dhanson wrote in post #15805477 (external link)
Here's my cheapie astrophotography setup:

Results:

Jupiter, its moon Io (dot to the bottom right of the planet), and Io's shadow on the surface:

Saturn in March:

IMAGE NOT FOUND
HTTP response: 403 | MIME changed to 'text/html'


The Moon:

Closeup of the moon with Apollo landing sites marked:

Wow! That is pretty amazing! What lens are you using with that? What is the equivalent focal length?


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Leffe67
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Apr 08, 2013 20:59 |  #6507

That first shot of the moon is just stunning. Beautiful work.

Care to share your setup?


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DigitalTuned
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Apr 08, 2013 21:16 |  #6508

Cheapie!!???
Wow awesome shots...


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dhanson
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Apr 08, 2013 21:43 |  #6509

Sure, I'd be happy to share more details.

Currently I'm using a Celestron C90. It's sold as a spotting scope, and it's about $189. But it's a fantastic astronomical telescope for planetary and lunar photography. Its focal length is 1250mm, focal ratio is f/13. I usually use it with a 2X Barlow lens, making it an f/26, 2500mm telescope.

The camera is a Canon 60D unmodified, attached to the scope with a T-adapter and T-ring. The T-ring is basically a canon mount on one side and a threaded ring on the other. The T-adapter fits in where the eyepiece would normally go, and the T-ring screws onto it. That makes the scope basically just a big lens for the camera.

You'd think that f/26 would be way too slow for astrophotography, but for the moon and the bright planets that's not the case. They are plenty bright enough to be able to shoot video of them. And that's the real trick here - you can't get images like this by just shooting a single still picture. If you try, atmospheric turbulence will limit your resolution on all but the very rarest of clear nights. Instead, you shoot in video mode, capturing hundreds or thousands of frames of video. Then you process the video in a program called "Registax", which is a free download on the web. Registax rips apart the video into frames, and then stacks the frames. It when combines the data from all the frames and using some powerful mathematics figures out what the 'real' image looks like behind all the turbulence, ISO noise, etc. The result is that a backyard telescope can take better pictures than even large ground-based observatories could manage just a few decades ago. Pretty cool stuff.

The moon image is the best picture I've ever taken of the moon. There's more than what meets the eye there too: It's actually a mosaic of several moon pictures, each of which was created from 500 frames of video to take the atmosphere out of play. At 2500mm, Only a portion of the moon is captured by the 60D. So, I basically did a panorama by taking video of each section as separate movies. Then I made master stills from each video and stitched them together in Photoshop. The result is an image that is much higher resolution than the original videos: The original image is 2114 x 1938, whereas the video captured was 1056 X 704

The last piece of the setup is the laptop and cable. To simplify all this, I use a program called "BackyardEOS" which is a remote capture program specifically designed for astronomy. It shows you the live view from your camera, controls all the camera settings, has tools for focusing, and it records the video and saves it in lossless AVI format instead of MOV, which Registax doesn't support. It was the only software I had to pay for, and I believe it was $30. For Jupiter and Saturn I used '5x' mode in BackyardEOS which uses just the center portion of the camera sensor for the video instead of using the entire sensor and downscaling. This essentially magnifies the result by another 5x.

Other than camera/tripod/laptop, the entire setup was about $300 including the adapters and Barlow lens.

For those interested, here's a link to Registax: Registax Stacking Software (external link). You could try it with moon pictures even with something like a 200mm lens and see how it works out for you. It's free.

The other software is BackyardEOS. Link here: BackyardEOS Canon camera control software (external link). There's a fully functional free trial if you want to play with it.

The Celestron C90 is sold as a spotting scope. For terrestrial use it has the problems of not having zoom capability and being a very long focal length (and very slow design), but if that's what you need it's a cheap way to go long. Amazon link for details: Celestron C90 (external link).

You can also get the telescope version from Celestron with a tripod and computerized 'goto' mount for around $400. In that form it's called the "Nextar 90 SLT". The slightly larger version is the Nextar 127, or the Nextar 4Se. All of those are the same design, but the larger ones will give you just a bit more light gathering and resolution. I would recommend that over using a photo tripod - the whole setup is a little too heavy for my Manfrotto 055xprob and RC482 Ballhead, making it hard to get centered on a target. If you have a gearhead, that would work much better.


Canon 60D | EF-S 15-85 IS f3.5-5.6 USM | Tamron 17-50 f2.8 non-VC | EF 50mm f1.8 | EF-S 55-250mm f3.5-5.6 | 430 EXII

  
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samsen
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Apr 08, 2013 22:02 |  #6510

^^^
This is an excellent note and instruction for anyone who is willing to start with Astrophotography.
Well deserve to be posted in a dedicated thread.
Great sharing info and salute.


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Show us your setup and the final result!
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