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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

 
MedicineMan4040
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Aug 09, 2016 17:28 as a reply to  @ post 18090810 |  #1051

Thanks so much for those pointers.
As always I have miles to learn.


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MedicineMan4040
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Aug 09, 2016 21:33 |  #1052

This guy landed in my finger and latched on. I pulled him off and sat him on a large mushroom-

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And different angle-

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MedicineMan4040
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Aug 09, 2016 23:07 |  #1053

A 5 shot pano of my home area-

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MedicineMan4040
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Aug 10, 2016 01:23 |  #1054

on a roll with a second frog woohoo-

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wesjr
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Aug 10, 2016 17:59 as a reply to  @ MedicineMan4040's post |  #1055

Most excellent view of the Tennessee mountains Robert.
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wesjr
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Aug 10, 2016 18:01 |  #1056

Funny acting Green-winged macaw from this afternoon at the St. Augustine Alligator Farm. Think he was playing with me. Never gave me a classic parrot pose.

Go figure.


Charlie Wesley
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Bianchi
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Aug 11, 2016 04:25 |  #1057

500II + 2XIII

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MedicineMan4040
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Aug 11, 2016 05:29 |  #1058

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wesjr
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Aug 12, 2016 17:07 |  #1059

Still shooting doors and windows in the historic district. Hope you have a great weekend.

Charlie Wesley
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mdvaden
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Aug 13, 2016 22:55 |  #1060

digital paradise wrote in post #18028809 (external link)
Very nice shots everyone. How many of you needed to buy a new computer to handle 50 megapixels.


Certainly not me. My son built me a fairly decent PC a couple years ago and it handles the files and processing fine.

Its better than what you can buy off the shelf in Best Buy for sure.

I hear that Costco online ordering taps into some fairly meaty computer systems for a great price. Much more advanced than what's in the warehouses.


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MedicineMan4040
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Aug 13, 2016 23:21 |  #1061

digital paradise wrote in post #18028809 (external link)
Very nice shots everyone. How many of you needed to buy a new computer to handle 50 megapixels.

Digital my little dinky Dell XPS Touch 13 can handle the 70-80mb files with ease in Bridgecc,PScc BUT LRcc struggles on my home PC and that machine is
a huge gaming pc. So I believe it's not the computer per se but Lightroom for sure.
p.s. I don't game, just bought a serious gaming computer thinking the huge amount of ram and good video cards would help with photos; plus we power a 50 inch
4K tv too that acts as monitor.


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MedicineMan4040
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Aug 14, 2016 07:43 |  #1062

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MedicineMan4040
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Aug 17, 2016 10:19 |  #1063

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clipper_from_oz
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Post edited over 2 years ago by clipper_from_oz. (7 edits in all)
     
Aug 18, 2016 09:40 |  #1064

John Sheehy wrote in post #18090810 (external link)
Cameras with RAW don't have ISO limits; they have ISO setting limits. An ISO 6400 in the EXIF in a shot that needs to be pushed 4 stops in conversion is really ISO 100K.

The most important thing I would say is that if you want the least noise in a weakly exposed image that you are going to downsample, do zero sharpening in your full 50MP conversion. Every slider that brings up detail, turn it down. Every slider that reduces detail, turn it up. Convert, and then downsample, and sharpen to taste.

Don't wait until an image is already reduced in pixel count to apply noise reduction. Noise reduction at that point eliminates fine details at the final low resolution. Hopefully, you won't need any more noise reduction at the reduced resolution.

A program like RAW Therapee will actually give you more options for extreme conversions, but it can be confusing with all the options.


...I find this post very interesting John. I am currently trying to overcome a downsampling IQ problem when downsampling my 5dsr bird images for posting on various forums like POTN (and some I subscribe to here in Australia )

Firstly, the sites I post to all have similar max long edge size of approx 1200 pixels a couple of forums here in Aust additionally have size restrictions of file size cannot exceed 400k.( cant remember POTN size restriction as the POTN downsampling engine does this automatically but the Aust sites require this ). And its when I downsample the 5dsr images to this size especially on fine feathered birds I get terrible IQ

Before I describe the actual IQ issue probably best to describe work flow . Starts with 1. RAW import to Lightroom on a Macbook Pro, 2. basic edit performed in Lightroom and then 3. export to JPG with downsample settings in Lightroom export set to 1200pixels widest edge @400k file size then 4 post to forum

What Im noticing is this .

1. When I look at the final cropped size on screen before downsampling( In this instance approx 3300 x 2200) all the feathers look perfectly sharp and huge detail without any need for additional sharpening etc. Detail and sharpness at the cropped 3000 size is almost as good as the 8400 native RAW size

2. The problem is when I downsample in Lightroom from cropped 3300 RAW size to 1200 Jpeg ethe image loses a lot of the fine feather detail almost taking on a jaggy/lumpy effect especially in the straight lines of many of the fine feathers . And this loss of detail is with absolutely no sharpening in either Lightroom or Apple preview etc before posting. In addition I have JPG quality set to 90% , no sharpening chosen in export etc ....Of course I understand that downsampling is going to bin detail so it will never be as good as the original size or a screen resize but what is bugging me is that the loss of detail doing a 1200 size image for web posting is basically a waste of time trying to get that sort of huge detail 5dsr gives ( even at a cropped 3000 size) when downsampling to a final size of 1200 . Infact Its that bad I am serious;lly thinking of not bothering posting 5DSR images @1200 size when its of of birds with fine feathers because of whats lost in resampling

Questions I have for John, or anyone else here who may be able to help with this problem is

1. Apart from Johns tips above are there any specific algorithms that PS has that may be better for downsampling to hold detail like very fine bird feathers better than the way Lightroom does. As lightrooms downsampling is auto Im not sure what algo is used in this auto process. ??

2. Is Lightroom maybe having issues with this large 5dsr RAW image when downsampling/exporting because of way the Lightroom 5dsr updates have been coded?...Again this may get back to no1 above but Im not 100% sure as Im not a software engineer and are there better apps available for editing and exporting/downsampling of a 5dsr RAW??..

.If someone has tried this in another app Im all ears on this issue...

Also .I have looked at a work around in forums by linking a larger image from say flikr to the posted image however the other forums here in Aus pull a 1200 file in initially to populate the thread which basically defeats the purpose of linking as people see a 1200 image first and regardless of app/engine used by Forum it has a huge IQ hit from being downsampled to get to the 1200 size. Although the forums downsampling engines do sometimes do a better job than Lightroom its still not the best for the fine feather details of some the bird images I take .


Ive included a comparison below of a screen capture of screen rendered "resize" of 1200( image on LHS) and and an actual "downsampled"/resample​d 1200 exported .JPG(RHS). . Both are similar scale . Can see the massive detail difference between the two in area circled in red. Image on left clearly has way better feather detail( even after an IQ hit of resizing on screen to 1200) but interestingly is not as sharp as RHS downs sampled JPG . Increased Sharpness must be some sort of algorith sharpness applied when downsampling takes place and its converted to a Jpeg.

Clipper


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Clipper
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MedicineMan4040
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Aug 18, 2016 19:05 |  #1065

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