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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 19 Jun 2015 (Friday) 04:50
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5DS and 5DSR PHOTO THREAD

 
Silver-Halide
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Oct 21, 2017 16:40 |  #1756

ken2000ac wrote in post #18465270 (external link)
You gents with 5DS models - are you seeing hot pixels on long exposures?

I've been reading on upgrading (10 years is a long time without buying any new gear) to the 5DSR, but since I do primarily long exposures the reports of hot pixels has me concerned. 30-60 seconds is my bread and butter, but I do 200-300 seconds quite often as well.

Any thoughts?

Just had this question: wondering if this is what's going on with some shots I made last night:

5DsR with 16-35 f/4L IS USM. 16mm, f/4.0, @ISO 6,400 for 30.0 seconds.


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toosas
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Oct 23, 2017 15:37 |  #1757


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Justinsmnz
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Oct 23, 2017 19:14 |  #1758

toosas wrote in post #18479225 (external link)
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forum: Canon EOS Digital Cameras

Wow! What a shot! I'd probably be tempted to try to clone out the bottom right for a perfect, clean margin. :-P I imagine that would make a spectacular large-format print.


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Presha
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Oct 23, 2017 22:50 as a reply to  @ Silver-Halide's post |  #1759

From my experience, with any hig-res camera (no matter the brand), the senor is designed to capture more detail, some better than others. In the case of the 5DS and 5DSR and night shooting, the sensors are functioning as they should, which is to capture more detail. However, you're talking about 50mpix packed onto a 35mm sensor; Which, is pushing the sensor to its limits when it comes to night shooting i.e, the over heating and red spots or burned out pixel will occur. Now, if you take a medium format (let's say a 645 sensor) with a high ISO range and has a great sensor design, you greatly reduce the chance of over heating, artifacts and burnt out pixels because now you have 50, 60,80 or 100mpix spread over a larger surface area.

Again, this is just my 2 cents and I would like to hear from others about this matter.

Presha


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Timphoto
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Oct 24, 2017 09:02 |  #1760

Silver-Halide wrote in post #18477799 (external link)
Just had this question: wondering if this is what's going on with some shots I made last night:

5DsR with 16-35 f/4L IS USM. 16mm, f/4.0, @ISO 6,400 for 30.0 seconds.

thumbnail
Hosted photo: posted by Silver-Halide in
./showthread.php?p=184​77799&i=i220688595
forum: Canon EOS Digital Cameras

thumbnail
Hosted photo: posted by Silver-Halide in
./showthread.php?p=184​77799&i=i66100390
forum: Canon EOS Digital Cameras


Looks like star trails, not hot spots to me. The kind that are characteristic of high megapixel, high density sensors.

You may want to read this Lonely Speck (external link) article to better understand.



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MalVeauX
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Post edited over 1 year ago by MalVeauX.
     
Oct 24, 2017 09:47 |  #1761

Silver-Halide wrote in post #18477799 (external link)
Just had this question: wondering if this is what's going on with some shots I made last night:

5DsR with 16-35 f/4L IS USM. 16mm, f/4.0, @ISO 6,400 for 30.0 seconds.

That's coma. And a little bit of star trailing due to using 30 seconds at this high of a pixel density.

The rest of that stuff is noise.

Very best,


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Silver-Halide
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Oct 24, 2017 19:33 |  #1762

MalVeauX wrote in post #18479715 (external link)
That's coma. And a little bit of star trailing due to using 30 seconds at this high of a pixel density.

The rest of that stuff is noise.

Very best,

Yeah its "the rest of that stuff."

I'm having a hard time cleaning it up in Lightroom. :oops:


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mdvaden
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Post edited over 1 year ago by mdvaden.
     
Oct 24, 2017 20:22 |  #1763

Silver-Halide wrote in post #18477799 (external link)
Just had this question: wondering if this is what's going on with some shots I made last night:

5DsR with 16-35 f/4L IS USM. 16mm, f/4.0, @ISO 6,400 for 30.0 seconds.

thumbnail
Hosted photo: posted by Silver-Halide in
./showthread.php?p=184​77799&i=i220688595
forum: Canon EOS Digital Cameras

thumbnail
Hosted photo: posted by Silver-Halide in
./showthread.php?p=184​77799&i=i66100390
forum: Canon EOS Digital Cameras


If f/4 the typical aperture for this kind of photography?

Also, was there any kind of breeze blowing?


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Presha
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Post edited over 1 year ago by Presha.
     
Oct 25, 2017 00:17 as a reply to  @ mdvaden's post |  #1764

Actually, I found that the best settings (for me at least) is f/2.8 for 20-30sec and focus to infinity for the sky and f/7 for 2-3mins ( depending on the darkness of the sky and surround light pollution) and also focus to infinity. Finally, merge the two shots together. Below are links to a couple of picture I shot using that technique!

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Hope that helps!

Presha

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clipper_from_oz
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Post edited over 1 year ago by clipper_from_oz. (2 edits in all)
     
Oct 25, 2017 08:52 |  #1765

A shot from my weekend walk along Yarra River . For those interested the bird is a local Rainbow Lorikeet.


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Clipper
5DSR,5DMkII,Fuji XPRO1,X-T1&X-T20,Fotoman 6x17cm Large Format Panorama Camera,Mamiya Universal 6x9
Canon EF 16-35mm f4 L, 17mm TSE f4 L,50mm f1.4, 24-70 f2.8 L, 70-200mm F4 L, 85mm f1.8, 100-400mm II L,
EF 400mm f2.8 IS II L, Fujinon XF18mmf2, XF35mmf1.4, XF60mm f2, XF18-55f2.8-4.5, XF55-200f4
Rodenstock, Sinar& Nikkor LF lens for Pano (75,95,150+210mm)
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Silver-Halide
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Oct 25, 2017 10:21 |  #1766

Presha wrote in post #18480320 (external link)


Hope that helps!

Presha

I've been there!!!!! :-D


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Presha
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Oct 25, 2017 14:49 as a reply to  @ Silver-Halide's post |  #1767

Lol! Awesome!


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Timphoto
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Oct 25, 2017 18:12 |  #1768

A little Fall color contrasting against the ash of the recent Tubbs Fire in the California wine country.


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Presha
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Oct 25, 2017 19:09 as a reply to  @ Timphoto's post |  #1769

Very strong contrast...love it!


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ken2000ac
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Oct 26, 2017 12:28 as a reply to  @ Silver-Halide's post |  #1770

I appreciate the concern and I appreciate your submission.

As someone who was sincerely worried about noise and hot pixels, your example provided doesn't give me cause for concern. 6400 iso at 30 seconds would be challenging for any bit of kit. Personally I only shoot between 50-400 iso for anywhere between 10 seconds and 5 minutes, so if your example is what has you worried, it actually eases my mind.


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5DS and 5DSR PHOTO THREAD
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