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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses
Thread started 15 Mar 2017 (Wednesday) 19:26
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That lens is not suitable for a 5DsR is disinformation

 
fplstudio
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Mar 15, 2017 19:26 |  #1

During my pre-purchase research I run into many threads of people alleging to the fact that glasses without the best optics perform poorly on a 5DsR body leading to the common belief that a 50 mpx body maximizes any lens flaw and requires only the best and recent glasses.
After 4 months of 5DsR extensive use I totally disagree with the above.

I have been looking through my last 2 years of pictures taken with 6D and 5DsR for a printing project and just figured out that obviously the best glasses help resolving the 50 mpx sensor but the improvements are even more noticeable when "average" glasses are used. In fact the outcome produced by the 24-105 f/4 L v.1, 85 1.8, 70-200 f/4 L from the 5DsR files blows the same files from the 6D out of the water. These lenses on the 5DsR are sharper and better in every regard at low iso.

I'm not looking for an answer - just giving (some of you) food for thought...

Cheers
Francesco


Canon 5Ds R | 16-35 4L IS | 24-105 4L IS | 70-200 4L IS | 100-400 4.5-5.6L IS ii | 14 2.8 Samy | 35 1.4 Art | 85 1.8 | 135 2L | EXT 1.4X II | AD200 | V860ii-C | 2x TT600

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eddieb1
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Post has been edited 7 months ago by eddieb1.
Mar 15, 2017 22:24 |  #2

Another example of not to believe everything you read on the internet, and not everyone is an expert on the net, even though they think they are.




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quickben
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Mar 15, 2017 22:47 |  #3

Was anyone else looking at his avatar whenever he said "glasses" ?


Fighting the war against the unnecessary use of the Book Worthy Smiley
My name is Gary, not Ben.
6D 24-70/2.8VC 85/1.8

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gjl711
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Mar 15, 2017 22:49 |  #4

The claim never made any sense. Think about it, if the lens performs poorly on the 5DsR then it will perform worse on the 7DII, 7D, and every recent Dxxx camera as their pixel density is even greater.


Not sure why, but call me JJ.
I used to hate math but then I realised decimals have a point.
.
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LonelyBoy
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Mar 16, 2017 06:08 |  #5

gjl711 wrote in post #18302182 (external link)
The claim never made any sense. Think about it, if the lens performs poorly on the 5DsR then it will perform worse on the 7DII, 7D, and every recent Dxxx camera as their pixel density is even greater.

Well, a FF lens that performs well on the high-density crops would need to be sharp enough across the field instead of just in the crop-size center. That is assuming, though, that the user needs full sharpness across the frame.


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SL1 | 24 STM | 18-135 IS STM | 55-250 IS STM
5D3 | 35/2 IS | 40 STM | Σ50A | 50 STM | 100L | 24-70L 2.8 II | 24-105L | 70-200/2.8L IS II | 70-300L | 100-400L II

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CheshireCat
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Mar 16, 2017 06:46 |  #6
banned

Uhm... "not suitable" is a big claim.
I think it should be translatead as: "these lenses, wide open, will not fully resolve the available sensor resolution over the entire frame when shooting test charts".

Now, if photography was all about sensor and lens resolution, it would not be an art.


1Dx, 5D2 and some lenses

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iowajim
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Mar 16, 2017 12:35 |  #7

I've noticed on the Dxo site that there's some correlation between pixel count and lens performance in terms of sharpness. The bigger the sensor, and the bigger the pixel count, the better a lens' sharpness.


Jim, in Iowa
80D / T2i / Tokina 11-16mm f2.8 / Sigma 18-35mm f1.8 / Canon 24-105 f4 / Tamron SP VC 70-200mm f2.8 / Sigma 150-600mm C

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gjl711
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Mar 16, 2017 12:40 |  #8

iowajim wrote in post #18302545 (external link)
I've noticed on the Dxo site that there's some correlation between pixel count and lens performance in terms of sharpness. The bigger the sensor, and the bigger the pixel count, the better a lens' sharpness.

I don't think that the lens is sharper but the sensor can resolve more detail.


Not sure why, but call me JJ.
I used to hate math but then I realised decimals have a point.
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CheshireCat
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Post has been edited 7 months ago by CheshireCat.
Mar 16, 2017 12:57 |  #9
banned

iowajim wrote in post #18302545 (external link)
I've noticed on the Dxo site that there's some correlation between pixel count and lens performance in terms of sharpness. The bigger the sensor, and the bigger the pixel count, the better a lens' sharpness.

That is because DXO uses sensors to "read" the lens sharpness, what matters here is only sensor element density.
If a lens is "sharper" on a denser sensor it is only because the other sensor was not dense enough to fully resolve the lens.


1Dx, 5D2 and some lenses

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gjl711
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Mar 16, 2017 13:05 |  #10

Thinking about it a bit I guess you can tell if the camera is out resolving the lens when you move to a higher density camera and there is no increase in resolution. So far I have never seen that but I think it's because we still have a way to go before sensors become so dense that an increase in sensor resolution will not result in an increase in image quality.


Not sure why, but call me JJ.
I used to hate math but then I realised decimals have a point.
.
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::Gear::

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CheshireCat
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Post has been edited 7 months ago by CheshireCat.
Mar 16, 2017 13:09 as a reply to gjl711's post |  #11
banned

Exactly, unless the lens is quite bad.


1Dx, 5D2 and some lenses

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mwsilver
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Mar 21, 2017 20:32 |  #12

gjl711 wrote in post #18302182 (external link)
The claim never made any sense. Think about it, if the lens performs poorly on the 5DsR then it will perform worse on the 7DII, 7D, and every recent Dxxx camera as their pixel density is even greater.

I think the issue the OP is alluding to is that some lenses have less resolving power than others and wouldn't be able to take full advantage of a higher resolution sensor.


Mark
Canon 7D II, 60D, T3i, T2i, Sigma 18-35 f/1.8, and 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM. Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, Lightroom 6, Elements 15

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mikeearly
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Mar 22, 2017 04:50 |  #13

i've had my 5DSr for about a year now and have used a number of my lens (both prime and variable) with it. My favorite being my 11-24. That said I haven't found that I have a lens that won't work with the body in terms of IQ. I will agree that the 51mp could reveal any short-comings in a lens but I have found my biggest problem with IQ detail is in doing the DOF right and keeping the camera from any movement whatsoever.

I've also found that this is not a body that I would ever try and use for all of my work. The detail is fantastic but for the vast majority of my work the 80D and the 1Dx are just great.


Mike Early
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Tom ­ Reichner
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Mar 22, 2017 12:09 |  #14

.

mwsilver wrote in post #18307470 (external link)
I think the issue the OP is alluding to is that some lenses have less resolving power than others and wouldn't be able to take full advantage of a higher resolution sensor.

This is absolutely correct, and has been proven time and time again with bench tests. But the OP seems to be saying that this is not true.

.


"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
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mwsilver
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Post has been last edited 7 months ago by mwsilver. 4 edits done in total.
Mar 22, 2017 12:43 |  #15

Tom Reichner wrote in post #18307990 (external link)
.

This is absolutely correct, and has been proven time and time again with bench tests. But the OP seems to be saying that this is not true.

.

That's likely what he's implying, but perhaps what he was really trying to convey was that the 5Dsr sensor will allow lenses to reach their full potential. Clearly resolving power can vary greatly and all lenses are not created equally.

Others have suggested that regardless of bench tests it's the real world results that count.


Mark
Canon 7D II, 60D, T3i, T2i, Sigma 18-35 f/1.8, and 30 f/1.4. Canon EF 70-200 L f/4 IS, EF 35 f/2 IS, EFs 10-18 STM, EFs 15-85, EFs 18-200, EF 50 f/1.8 STM. Tamron 18-270 PZD, B+W MRC CPL, Canon 320EX, Vanguard Alta Pro 254CT & SBH 250 head. RODE Stereo Videomic Pro, Lightroom 6, Elements 15

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That lens is not suitable for a 5DsR is disinformation
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