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Messages - @!ex

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31
EOS Bodies - For Video / Re: Problems with Canon mk3 locking up
« on: February 20, 2013, 06:49:12 PM »
Possible the new high megapixel camera in a bigger body than the 5D Mark III is an option for you. The image quality is amazing.

You act like you have used or seen actual output from the new high megapixel camera, if so please elaborate....

32
5D MK III Sample Images / Re: Ultra long daytime exposures - 5D mkiii
« on: December 30, 2012, 02:10:32 AM »
Excited!  My GF just gave me a 9 stop Variable ND for Christmas!  Can't wait to try it out!  ;D
It is a cancer, you will crave more ND stops the moment you play with the 9 you already have...

33
Lenses / Re: Fellow stargazers & nighttime landscape loners!
« on: December 19, 2012, 12:56:56 AM »
A "Star Tracker"? I've never heard of that. Is it software or a device?


A device. You put it on top of a tripod, and it is kinda like a wedge whose angle must be set to an angle corresponding to your latitude. A motor on the wedge then drives the camera/telescope mounted to it at 1 rev per 24 hours, thereby "despinning" the Earth. Or to put it another way, it compensates for the rotation of the Earth when you take long exposures, so you don't get star trails. So you can expose for very long times.

Martin


Oh, wow, nice! I'd be very interested in this :)


This is the star tracker I am drooling over right now.  I imagine it very portable so it wouldn't be a bitch to carry around.  I could take a long exposure with a low ISO of the foreground first, then turn this badboy on and take a long exposure of the stars (low ISO, relatively).  then blend the two images in post.  I know it would be awesome....

http://www.vixenoptics.com/mounts/polarie.html


34
Lenses / Re: Fellow stargazers & nighttime landscape loners!
« on: December 17, 2012, 06:56:53 PM »
My best current lens is the 14mm 2.8 L II.  it is wide enough that at 30sec exposure the star trail is very small, and the 2.8mm is pretty fast.  I've heard the 24mm 1.4 is the best of both worlds, as far as wide-angle and speed is concerned, and I have been drooling over it for a while now.  My other thought is to get a star tracker and then combine a foreground shot with a star shot in post for the ultimate in low noise and sharpness. 

Here are a few shots I've done with my 14L:


Light Pollution by @!ex, on Flickr


Sitting With the Milky Way by @!ex, on Flickr


Sitting on the Dock by @!ex, on Flickr

It's hard to sit still for 30 seconds...


Hold Still by @!ex, on Flickr

35
5D MK III Sample Images / Re: Ultra long daytime exposures - 5D mkiii
« on: December 17, 2012, 01:29:06 AM »
Chris, nice comp, but I'm wondering what you achieved by the long exposure?  Maybe a bit smother water?  I see that it was 8 seconds and ISO 320, f8.  why not push it a bit more, and get a 30sec+ exposure?  you would start to get a lot more cloud movement and a more surreal effect, but maybe that is just my tendency to push things to the limit.  Also the white balance is just a bit off, which tends to be a major problem of dark ND filters.  Always helpful to shoot these in RAW so it's not as much of a problem.

37
5D MK III Sample Images / Re: Post Your Best Hi-ISO/Low Light 5DIII Shots!
« on: December 16, 2012, 05:04:29 PM »
Out for a drink with some good friends...


On the Rocks by @!ex, on Flickr

38
5D MK III Sample Images / Re: Ultra long daytime exposures - 5D mkiii
« on: December 04, 2012, 04:09:28 PM »
Quote
Any vibration caused by mirror movement should affect the image minimally, as long as the vibration lasts for <1 second, and the exposure on the order of minutes

+2 - True without question esp. on shots 2 and 3 but shot number 1 appears close to street traffic  (seems apparent) possible more vibrations throughout entire length of exposure.

Ya the thing to worry about a lot more (like you are saying) on these long exposures is wind and tripod shift.

39
Lenses / Re: Advice 5d3, wide angle
« on: December 04, 2012, 04:07:46 PM »
I am happy to post full res files but need a suggestion on where to do it.


I'd be interested in the quality loss to - upload full size jpeg to minus.com or abload.de if you happen to speak German, then you can link directly to it. If you want to share the raw files use any sharehoster like rapidshare or one of the trillions of clones.


Here is a link to these three images as full sizeed jpegs. http://minus.com/lbu1riruvU4Q4l

I posted this picture as an example because with all the straight lines it very clearly shows what each program actually does. I have done nothing to any of them other than run CA adjustments.

This subject is not a good demonstration of corner detail though as it was handheld in not ideal light, I'll hunt through my files to try to find something a bit more relevant to that aspect.

I am pretty particular but am still happy with 14"x21" prints from defished images when shot carefully.


Thanks for the links.  I guess what I meant by resolution loss, is how much do you lose to the black vignetting that happens at 8mm on FF (or any other focal length beside 15mm).  Seems like it is a pretty substantial portion of the sensor, but the effect you can get might make it worth it...

40
cool tire and bike pic.  You using Fusion still ?

Thanks! I use little bit of everything, fusion, hdr, and blending.  Really depends on the particular challenges of the shot.

41
Lenses / Re: Advice 5d3, wide angle
« on: December 03, 2012, 02:55:44 PM »


Fuck.

Now I need the 8-15.  You bastard.

Always glad to help  :)

I actually have the 17TS-E for high end real estate interiors, but if I know the image is only a filler and not a brochure leading headliner then I will often shoot the 15mm and de-fish. But don't tell anybody, it is my secret!!

Once it is defished, what is the resolution (pixel x pixel)? Do you by chance have a full res shot you could link to, for science?  Thanks in advance.

42
5D MK III Sample Images / Re: Ultra long daytime exposures - 5D mkiii
« on: December 03, 2012, 02:53:31 PM »
Just don't forget to do the MLU (mirror lock up) to avoid vibration. 
Any vibration caused by mirror movement should affect the image minimally, as long as the vibration lasts for <1 second, and the exposure on the order of minutes
Quote
I've read about the IQ degrading at F16 and F22 or higher (one of mine goes to F32) but I believe that only applies to shorter exposures example 1/15, 1/10, etc.  if you have that lens open long enough the sensor will pick up more detail, colors etc which would somewhat mitigate the worry over IQ (excluding diffraction of course).
Diffraction is the main cause of image degradation at small apertures, and it occurs regardless of integration time.

-h

+1, MLU is pointless on these shots as any vibration would happen so fast that no light would even be registered on the sensor yet.

43
5D MK III Sample Images / Re: Ultra long daytime exposures - 5D mkiii
« on: December 03, 2012, 02:52:20 PM »
So an ND 1.2 is 4 stops. Where can I get one of these crazy 10 stop filters? I've never seen more than a 1.2.

Search the internet.  I think B&H or adarama..

44
Just a couple I took recently...


The Tops of an Empty Town… by @!ex, on Flickr


Shadows at the Windowpanes by @!ex, on Flickr


Last Ride by @!ex, on Flickr


The Door That Peels by @!ex, on Flickr


Everything Peels... by @!ex, on Flickr


Fall in Boulder by @!ex, on Flickr


Fools Gold by @!ex, on Flickr


End of the Road by @!ex, on Flickr


45
5D MK III Sample Images / Re: Ultra long daytime exposures - 5D mkiii
« on: December 03, 2012, 02:50:00 AM »
Daniel Flather: I did not know that! I guess that shows how much I look at the back of a lens.

Where can one purchase gels that fit?

Any gel will fit, there is an outline on the back of the lens, can't remember exactly the measurements, but you just cut the gel with some regular scissors and then you pop it in (they are just like pieces of transparency paper).  A nice thing is that the standard gel size could actually give you more than one filter at the size you need, that way if you mess one up you can just cut another one.  I use a folded lens cloth to hold them in an old, small lens-filter case for portability.  Much nicer then carrying around a lee big stopper, which is why I prefer them.  Also they are much better in terms of color neutrality than glass because they are almost perfectly neutral, AND they are a LOT cheaper...

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