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Thread started 15 Mar 2005 (Tuesday) 23:10
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Canon EF 100-400mm f/4.5-5.6L IS USM - AKA The Dust Pump

 
T2i4me
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Jan 21, 2012 18:40 |  #5401

Sydor25 wrote in post #13742611 (external link)
QUOTED IMAGE

I'm impressed, F5.6 and ISO 800, wow that 1D Mark III and the 100-400 work well together. Can't say I get this kind of sharpness with my T2i.....yet!


-- Eric --
5DC - T2i - 100-400 L IS - 70-200 F4 L - 17-40 L - EF 85 1.8 - EF-S 10-22 - EF-S 15-85 IS - EF-S 60 macro - 430EX II

  
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jwcdds
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Jan 22, 2012 04:56 |  #5402

IMAGE: http://julianchen.smugmug.com/Photography/Astrophotography/i-8dZ3Gjw/0/L/20120122-Canon-EOS-7D-IMG3867-L.jpg

IMAGE: http://julianchen.smugmug.com/Photography/Astrophotography/i-f6dtkhH/0/L/20120122-Canon-EOS-7D-IMG3873-L.jpg

Julian
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Candersson
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Jan 22, 2012 10:31 as a reply to  @ jwcdds's post |  #5403

^^ Stunning!
You must have shot these in a place with very little light noise....


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jwcdds
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Jan 22, 2012 11:59 |  #5404

Thank you. But sadly no on the "little light noise." These were taken on the roof top of our 4-story condo building, dead smack in west Los Angeles (lots of light here in LA). :lol:

I look forward to the days when I have time to drive out into the desert and attempt these shots.


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Candersson
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Jan 22, 2012 12:56 |  #5405

jwcdds wrote in post #13748218 (external link)
Thank you. But sadly no on the "little light noise." These were taken on the roof top of our 4-story condo building, dead smack in west Los Angeles (lots of light here in LA). :lol:

I look forward to the days when I have time to drive out into the desert and attempt these shots.

That makes it even more impressive... :cool:

IMAGE: http://www.anderssonbros.com/smiley/thumbup.gif

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jwcdds
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Jan 22, 2012 16:35 |  #5406

Candersson wrote in post #13748462 (external link)
That makes it even more impressive... :cool:
[GIFS ARE NOT RENDERED IN QUOTES]

Thank you sir. :)

I just discovered a hummingbird had made its nest in a palm tree at the center of our condominium courtyard. I look forward to stalking it in the coming days/weeks when opportunity arises.

IMAGE: http://julianchen.smugmug.com/Misc/Lens/100-400L/i-JqGd4Fx/0/XL/20120122-Canon-EOS-7D-IMG3886-XL.jpg

IMAGE: http://julianchen.smugmug.com/Misc/Lens/100-400L/i-x8fJJHk/0/XL/20120122-Canon-EOS-7D-IMG3900-XL.jpg

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Jan 22, 2012 18:42 as a reply to  @ jwcdds's post |  #5407

I know this thread is supposed to be mostly for photos, but I had to comment: LOVE the hummingbird shots. What a lucky find.


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jwcdds
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Jan 22, 2012 19:17 |  #5408

Thank you. :)


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peterbj7
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Jan 22, 2012 20:21 |  #5409

That picture of Saturn is by far the most impressive amateur photograph not taken with a telescope that I've ever seen. Did you sue just the 100-400 lens, with no extenders or anything?


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commonjunks
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Jan 22, 2012 21:05 |  #5410

peterbj7 wrote in post #13750520 (external link)
That picture of Saturn is by far the most impressive amateur photograph not taken with a telescope that I've ever seen. Did you sue just the 100-400 lens, with no extenders or anything?

I think he use 2X, but still i would like to know how you did it.


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jwcdds
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Jan 22, 2012 22:47 |  #5411

peterbj7 wrote in post #13750520 (external link)
That picture of Saturn is by far the most impressive amateur photograph not taken with a telescope that I've ever seen. Did you sue just the 100-400 lens, with no extenders or anything?

Thanks. :D

commonjunks wrote in post #13750750 (external link)
I think he use 2X, but still i would like to know how you did it.

Yeah, I did use the 2x extender. I picked one up last week as I wanted to see if I could get a better shot of Jupiter than what I was able to get with the bare 100-400.

I must confess... this project was a LOT more difficult than I had anticipated. The 2-stop loss of light was huge. It automatically required that I attempt these shots at iso 1600/3200 @ shutter speeds of 1/100-1/400s. Slower than 1/100s and the celestial objects start to look oblong and trail.

Focusing via live view was also tough since even while mounted on a tripod, there was still quite a bit of vibration. And at that magnification, even the slightest twist of the focus ring meant the difference of the planet showing on the LCD or out of frame. And at 10x live view zoom, it's quite amazing to see the earth's own rotation resulting in the planets/stars darting across the frame. And now I understand why those auto-tracking mounts/motors on telescopes are so important.

I decided to leave the image stabilizer on. As counter-intuitive as that may sound on a tripod, surprisingly it actually helped me get more keepers than when the IS wasn't on. I guess at 800mm... there was still some vibration from the roof on the condo and from the light crosswind on top of the building. Having IS on also meant it gave me a better shot at manual focus.

In any case, overall, I spent about 30-45 minutes messing with the settings and focusing, and also waiting for the clouds to clear. While the nights have been moonless around here so far, working to my advantage... it hasn't been cloudless. So hopefully I'll get a few more opportunities later this week.


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Jan 23, 2012 12:07 |  #5412

The photo of Saturn is impressive with the Earth's rotation and any vibration I can't believe you did that good. So share some shots with the 2x converter, I would like to know if it's worth getting one for birding, just concerned about sharpness.


-- Eric --
5DC - T2i - 100-400 L IS - 70-200 F4 L - 17-40 L - EF 85 1.8 - EF-S 10-22 - EF-S 15-85 IS - EF-S 60 macro - 430EX II

  
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Mr. ­ D123
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Jan 23, 2012 12:49 |  #5413

IMAGE: http://farm8.staticflickr.com/7020/6745859391_bcf67b127a_b.jpg
IMAGE: http://farm8.staticflickr.com/7150/6745857451_93a4f5c77f_b.jpg


I'm kind of sad I have to give back the lens.



  
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jwcdds
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Jan 23, 2012 15:12 |  #5414

T2i4me wrote in post #13753715 (external link)
The photo of Saturn is impressive with the Earth's rotation and any vibration I can't believe you did that good. So share some shots with the 2x converter, I would like to know if it's worth getting one for birding, just concerned about sharpness.

Thanks. :D

Well, the 2x on any of the lenses in your signature (70-200/4 and the 100-400) will make AF impossible. So unless you're going to be aiming at birds "perched" somewhere and not flying, you most likely won't want the 2x, no matter how good the optics are.

I'll try and find some time to try out the 2x on my 70-200/2.8 and report back and post some results. But it won't be in this archive thread since it'd be for the wrong lens.


Julian
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T2i4me
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Jan 23, 2012 20:50 |  #5415

No I understand I would lose auto focus, these would be birds "perched" as you note.


-- Eric --
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Canon EF 100-400mm f/4.5-5.6L IS USM - AKA The Dust Pump
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