85/1.4 vs. 85/1.2 MTF charts

Started 4 weeks ago | Discussions
J A C S
J A C S Senior Member • Posts: 8,824
85/1.4 vs. 85/1.2 MTF charts
3
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J A C S
OP J A C S Senior Member • Posts: 8,824
Re: 85/1.4 vs. 85/1.2 MTF charts
1
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J A C S
OP J A C S Senior Member • Posts: 8,824
full resolution sample
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mordor_74 Regular Member • Posts: 491
Re: full resolution sample

I think i could make myself a reason of that sharpness wide open!

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Powerdoc Veteran Member • Posts: 3,399
Re: 85/1.4 vs. 85/1.2 MTF charts

J A C S wrote:

85/1.4 http://www.canon.com.hk/en/product/catalog/productItemDetails.do?domainID=10010&prrfnbr=201243

85/1.2 II http://www.canon.com.hk/en/product/catalog/productItemDetails.do?prrfnbr=10256

How to read an MTF chart

Not as good as the 35LII:

Thanks for the MTF charts

According to canon engineers this lens is a balance between bokey and sharpness.

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pokesfan
pokesfan Regular Member • Posts: 437
Looks good!

This is much easier to read than a chart. I don't see any deficiency with sharpness or bokeh rendering. They could use a better photographer however, judging from the set of sample images
Now can we move the shipping date up to September, so we can actually use this lens during wedding season?

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Tazz93
Tazz93 Senior Member • Posts: 1,778
Re: 85/1.4 vs. 85/1.2 MTF charts
1

From the samples things look good, but... at least to me, the MTF chart doesn't seem to match this sample. On Canon's website, there's more full res samples and one seems to match the MTF chart's projected performance, but the two others seem a little better than the charts would suggest. Granted it's all a guesstimation, but I'm curious to see its performance first hand, or in a third party resolution measuring matrix.

What is great and seems pretty obvious, is they have worked very hard on CA and keeping it in check wide open. If accurate, that's a big strong point.

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Scott Larson Veteran Member • Posts: 5,939
Re: 85/1.4 vs. 85/1.2 MTF charts
1

Powerdoc wrote:

According to canon engineers this lens is a balance between bokey and sharpness.

Where did you read this?

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J A C S
OP J A C S Senior Member • Posts: 8,824
Re: Looks good!

pokesfan wrote:

This is much easier to read than a chart. I don't see any deficiency with sharpness or bokeh rendering. They could use a better photographer however, judging from the set of sample images

The skin tones are horrible.

I see a hint of green fringing, and that is. No nervousness in the transition area, very nice overall.

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MAC Forum Pro • Posts: 13,437
Re: 85/1.4 vs. 85/1.2 MTF

J A C S wrote:

How to read an MTF chart

Not as good as the 35LII:

been waiting for 85 with IS and great bokeh

will study photos

maybe a purchase by spring

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aftab
aftab Veteran Member • Posts: 9,456
Re: 85/1.4 vs. 85/1.2 MTF charts
3

Scott Larson wrote:

Powerdoc wrote:

According to canon engineers this lens is a balance between bokey and sharpness.

Where did you read this?

Read with Google translation.

http://cweb.canon.jp/ef/info/ef85-f14-usm/interview.html

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Scott Larson Veteran Member • Posts: 5,939
Re: 85/1.4 vs. 85/1.2 MTF charts

aftab wrote:

Scott Larson wrote:

Powerdoc wrote:

According to canon engineers this lens is a balance between bokey and sharpness.

Where did you read this?

Read with Google translation.

http://cweb.canon.jp/ef/info/ef85-f14-usm/interview.html

Thank you! There's lots of discussion about eliminating color aberrations which is what I'm looking for.

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1Dx4me Senior Member • Posts: 2,806
Re: Looks good!
1

pokesfan wrote:

This is much easier to read than a chart. I don't see any deficiency with sharpness or bokeh rendering. They could use a better photographer however, judging from the set of sample images
Now can we move the shipping date up to September, so we can actually use this lens during wedding season?

post processing is done very poorly, also! i enlarged the shot and it looks horrid! i wouldn't attempt to print this shot more than 8x11 (if that much)!

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Powerdoc Veteran Member • Posts: 3,399
Re: 85/1.4 vs. 85/1.2 MTF charts

Tazz93 wrote:

From the samples things look good, but... at least to me, the MTF chart doesn't seem to match this sample. On Canon's website, there's more full res samples and one seems to match the MTF chart's projected performance, but the two others seem a little better than the charts would suggest. Granted it's all a guesstimation, but I'm curious to see its performance first hand, or in a third party resolution measuring matrix.

What is great and seems pretty obvious, is they have worked very hard on CA and keeping it in check wide open. If accurate, that's a big strong point.

The 85 L 1.2 was good for lateral CA, but bad for axial CA (purple fringing)

The new one seems better for axial CA. MTF curves tell nothing about axial CA, because it's out of the plane of focus. It's also tell nothing about colors, vignetting, distorsion and flare.

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Tazz93
Tazz93 Senior Member • Posts: 1,778
Re: 85/1.4 vs. 85/1.2 MTF charts

Powerdoc wrote:

Tazz93 wrote:

From the samples things look good, but... at least to me, the MTF chart doesn't seem to match this sample. On Canon's website, there's more full res samples and one seems to match the MTF chart's projected performance, but the two others seem a little better than the charts would suggest. Granted it's all a guesstimation, but I'm curious to see its performance first hand, or in a third party resolution measuring matrix.

What is great and seems pretty obvious, is they have worked very hard on CA and keeping it in check wide open. If accurate, that's a big strong point.

The 85 L 1.2 was good for lateral CA, but bad for axial CA (purple fringing)

The new one seems better for axial CA. MTF curves tell nothing about axial CA, because it's out of the plane of focus. It's also tell nothing about colors, vignetting, distorsion and flare.

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It's all about photography

I don't judge CA off the MTF charts (not sure that's even definitively possible), the samples do a good job of confirming that. My only worry is, the samples look processed. If that's the case a lens profile would make a lens that suffers from CA issues look perfect. Personally I'm waiting for a Lens Rental MTF, or the DXO Sharpness "Profile". I find these two resources very comparable and relatable to image resolution.

As far as distortion, flare, vignetting, and colors... samples tell the entire story.  The only thing you'll need to confirm is there are no adjustments made to the sample images.

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J A C S
OP J A C S Senior Member • Posts: 8,824
Re: 85/1.4 vs. 85/1.2 MTF charts

Tazz93 wrote:

Powerdoc wrote:

Tazz93 wrote:

From the samples things look good, but... at least to me, the MTF chart doesn't seem to match this sample. On Canon's website, there's more full res samples and one seems to match the MTF chart's projected performance, but the two others seem a little better than the charts would suggest. Granted it's all a guesstimation, but I'm curious to see its performance first hand, or in a third party resolution measuring matrix.

What is great and seems pretty obvious, is they have worked very hard on CA and keeping it in check wide open. If accurate, that's a big strong point.

The 85 L 1.2 was good for lateral CA, but bad for axial CA (purple fringing)

The new one seems better for axial CA. MTF curves tell nothing about axial CA, because it's out of the plane of focus. It's also tell nothing about colors, vignetting, distorsion and flare.

-- hide signature --

It's all about photography

I don't judge CA off the MTF charts (not sure that's even definitively possible), the samples do a good job of confirming that. My only worry is, the samples look processed. If that's the case a lens profile would make a lens that suffers from CA issues look perfect. Personally I'm waiting for a Lens Rental MTF, or the DXO Sharpness "Profile". I find these two resources very comparable and relatable to image resolution.

As far as distortion, flare, vignetting, and colors... samples tell the entire story. The only thing you'll need to confirm is there are no adjustments made to the sample images.

Those must be JPEGs from the camera, as usual. You can use an exif tool to see what has been corrected.

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Tazz93
Tazz93 Senior Member • Posts: 1,778
Re: 85/1.4 vs. 85/1.2 MTF charts

Great point, I'll look and see if the exif info reveals any correction.

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J A C S
OP J A C S Senior Member • Posts: 8,824
Re: 85/1.4 vs. 85/1.2 MTF charts
1

Tazz93 wrote:

Great point, I'll look and see if the exif info reveals any correction.

I looked and it seems that they used all possible corrections. Vignetting was less than 100%, somewhere around 60-70%.

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Tazz93
Tazz93 Senior Member • Posts: 1,778
Wow...

J A C S wrote:

Tazz93 wrote:

Great point, I'll look and see if the exif info reveals any correction.

I looked and it seems that they used all possible corrections. Vignetting was less than 100%, somewhere around 60-70%.

Thanks for taking a look. I haven't been able to look at it yet, but that is a little disturbing (but as referenced earlier not very unexpected).

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J A C S
OP J A C S Senior Member • Posts: 8,824
Re: 85/1.4 vs. 85/1.2 MTF charts
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