December 18, 2017, 08:05:47 AM

Author Topic: TDP reviews the 85 f/1.4L IS USM  (Read 5621 times)

kaihp

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #30 on: December 13, 2017, 03:27:16 PM »
EF85mm f/1.4L IS USM: Developer Interviews (1)

https://snapshot.canon-asia.com/article/en/ef85mm-f14l-is-usm-developer-interviews-1

EF85mm f/1.4L IS USM: Developer Interviews (2)

https://snapshot.canon-asia.com/article/en/ef85mm-f14l-is-usm-developer-interviews-2

Thank you for sharing. Interesting read!

Absolutely +1! I haven’t read it befand it’s very interesting read indeed. I knew about the shock absorber on my 35 L II, but didn’t know the 85 also had it, nice!

Awesome reads indeed.
There was one thing that struck me as odd in the 2nd part though: they write that:
Quote
For your reference, the EF85mm f/1.2L II USM uses the large diameter USM found in lenses such as the EF400mm f/2.8L IS II USM super-telephoto lens.
Shouldn't that be refering to the new f/1.4L IS USM? The f/1.2L seems quite out of context there.

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #30 on: December 13, 2017, 03:27:16 PM »

neuroanatomist

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #31 on: December 13, 2017, 03:52:07 PM »
There was one thing that struck me as odd in the 2nd part though: they write that:
Quote
For your reference, the EF85mm f/1.2L II USM uses the large diameter USM found in lenses such as the EF400mm f/2.8L IS II USM super-telephoto lens.
Shouldn't that be refering to the new f/1.4L IS USM? The f/1.2L seems quite out of context there.

I’m sure it properly refers to the 85/1.2L II using the larger USM variant.  The 85/1.4L IS is internally focusing, using a (relatively) small focusing group like typical lenses.  The 85/1.2L II is front focusing, meaning that massive front element moves to achieve focus, which requires a more robust focusing motor (the front element of the 85/1.2 is probably similar in size to the focusing groups in the supertele lenses). 
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Larsskv

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #32 on: December 13, 2017, 04:19:31 PM »
EF85mm f/1.4L IS USM: Developer Interviews (1)

https://snapshot.canon-asia.com/article/en/ef85mm-f14l-is-usm-developer-interviews-1

EF85mm f/1.4L IS USM: Developer Interviews (2)

https://snapshot.canon-asia.com/article/en/ef85mm-f14l-is-usm-developer-interviews-2

Thank you for sharing. Interesting read!

Absolutely +1! I haven’t read it befand it’s very interesting read indeed. I knew about the shock absorber on my 35 L II, but didn’t know the 85 also had it, nice!

I noticed that particular detail as well. Nice to see that my new (Used) 11-24L has it to. Surprising to see that it is in the 24-70 L f4...

hne

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #33 on: December 13, 2017, 04:27:42 PM »
There was one thing that struck me as odd in the 2nd part though: they write that:
Quote
For your reference, the EF85mm f/1.2L II USM uses the large diameter USM found in lenses such as the EF400mm f/2.8L IS II USM super-telephoto lens.
Shouldn't that be refering to the new f/1.4L IS USM? The f/1.2L seems quite out of context there.

I’m sure it properly refers to the 85/1.2L II using the larger USM variant.  The 85/1.4L IS is internally focusing, using a (relatively) small focusing group like typical lenses.  The 85/1.2L II is front focusing, meaning that massive front element moves to achieve focus, which requires a more robust focusing motor (the front element of the 85/1.2 is probably similar in size to the focusing groups in the supertele lenses).

It also states that the f/1.4 lens uses the USM from the f/1.8
Preferred gear: 5D IV, 35/1.4L, 85/1.4L IS, 70-200/2.8L IS, Elinchrom RX
Backup: 5D II, 17-40/4L, 85/1.8, 100-400/4.5-5.6L, Yongnuo + 622

Ah-Keong

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #34 on: December 13, 2017, 10:55:25 PM »
hope Canon comes up with a mechanical MF "85mm f/1,2L mark III" like the 50mm f/1,2L !!
and faster AF too!
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hne

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #35 on: December 14, 2017, 03:36:12 AM »
There was one thing that struck me as odd in the 2nd part though: they write that:
Quote
For your reference, the EF85mm f/1.2L II USM uses the large diameter USM found in lenses such as the EF400mm f/2.8L IS II USM super-telephoto lens.
Shouldn't that be refering to the new f/1.4L IS USM? The f/1.2L seems quite out of context there.

I’m sure it properly refers to the 85/1.2L II using the larger USM variant.  The 85/1.4L IS is internally focusing, using a (relatively) small focusing group like typical lenses.  The 85/1.2L II is front focusing, meaning that massive front element moves to achieve focus, which requires a more robust focusing motor (the front element of the 85/1.2 is probably similar in size to the focusing groups in the supertele lenses).

Part two shows this lens diagram of the 85/1.2L II:

I read that as almost the entire optical system moving.

And describing the new 85/1.4L IS lens a bit further down: "To keep the outer diameter small enough for extended handheld shooting, we decided to use a relatively small type of USM, which is used in many other EF lenses including the EF35mm f/2 IS USM and EF85mm f/1.8 USM" and "For your reference, the EF85mm f/1.2L II USM uses the large diameter USM found in lenses such as the EF400mm f/2.8L IS II USM super-telephoto lens."
Preferred gear: 5D IV, 35/1.4L, 85/1.4L IS, 70-200/2.8L IS, Elinchrom RX
Backup: 5D II, 17-40/4L, 85/1.8, 100-400/4.5-5.6L, Yongnuo + 622

Sharlin

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #36 on: December 14, 2017, 04:22:10 AM »
Part two shows this lens diagram of the 85/1.2L II:

I read that as almost the entire optical system moving.

Yeah. No wonder the AF is slow, that's a lot of glass to move.

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #36 on: December 14, 2017, 04:22:10 AM »

neuroanatomist

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #37 on: December 14, 2017, 06:51:35 AM »
I read that as almost the entire optical system moving.

Indeed, looks like everything but the rear element is in the moving inner barrel.  Thanks!
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kaihp

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #38 on: December 14, 2017, 07:21:19 AM »
I read that as almost the entire optical system moving.

Indeed, looks like everything but the rear element is in the moving inner barrel.  Thanks!

Thanks to both of you for clearing up my confusion.

YuengLinger

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #39 on: December 14, 2017, 09:25:50 AM »
I read that as almost the entire optical system moving.

Indeed, looks like everything but the rear element is in the moving inner barrel.  Thanks!

This helps me appreciate its accuracy and understand its lack of speed.  I'm lucky with my copy--pinpoint even at 1.2.

Larsskv

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #40 on: December 16, 2017, 06:16:02 AM »
I read that as almost the entire optical system moving.

Indeed, looks like everything but the rear element is in the moving inner barrel.  Thanks!

This helps me appreciate its accuracy and understand its lack of speed.  I'm lucky with my copy--pinpoint even at 1.2.

+1. I am very satisfied with the accuracy of my 85L f1.2 as well. Paired with the 1DXII I have used it with success on running children as well.

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Re: TDP reviews the 85 f/1.4L IS USM
« Reply #40 on: December 16, 2017, 06:16:02 AM »