Samyang to announce a 14mm f/2.8 RF and 85mm f/1.4 RF soon

uri.raz

EOS 80D
Jan 5, 2016
149
101
Any third party lenses for Canon will have reverse engineered autofocus. I doubt Samyang has worked out the R mount autofocus yet and reverse engineering will never beat native autofocus for reliability. Also, don’t expect Zeiss to produce R mount autofocus lenses. Sony share their autofocus technology which is why that mount has autofocus lenses from Zeiss.
Shouldn't they be able to fake as if the lens is connected via an adapter, and use their existing EF implementation?
 
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JoFT

I do love photography
Nov 9, 2014
219
46
59
Germany
delightphoto.zenfolio.com
I have used both lenses a couple of days now.

Finally both lenses as convinced me, especially because of the expected price point. I do not think that they make it much more expensive....
Interestingly they are lighter and better to handle than using the RF-EF Adapter.

Regarding the 14mm f2.8: they added a bit of dust and weather proofing, wich is nice to get.

Regarding the 85mm f1.4: First of all the image quality is pretty impressive. Especially color and bokeh-rendering..

Regarding focusing: mirrorless is making the use of manual focusing lenses much easier. Manual focusing is more accurate than autofocus... you have more control - especially with the 10x magnification in the viewfinder... What has astonished me the most was how well focus peaking works...

In conclusion: for newcomers without any glass and history, especially in combination with the RP: these lenses are the budget add ons....
 
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jedy

EOS T7i
Feb 14, 2014
84
15
Shouldn't they be able to fake as if the lens is connected via an adapter, and use their existing EF implementation?
That makes no sense. You may as well just use their EF lenses with an adapter in that case. The main point I was making is that reverse engineering will never be as good as native autofocus. Also no guarantee of future camera compatibility.
 

JoFT

I do love photography
Nov 9, 2014
219
46
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Germany
delightphoto.zenfolio.com
Due to my taste and understanding all reverse engineered lenses fail more or less. Therefore manual focusing lenses come into the picture. You save money and weight and good results. But you need some skills...
 

SwissFrank

EOS RP
Dec 9, 2018
301
116
That makes no sense. You may as well just use their EF lenses with an adapter in that case.
Uri was totally right. You completely miss the point.

Using their EF lenses on an adapter doesn't allow them to take advantage of the far better film-flange distance to make a far sharper/compact/cheaper lens.

Uri's only talking about the protocol of communication.

And as I've been doing computer protocols for 30 years, I totally agree with his point that if a lens maker can't reproduce the RF protocol at first, they could reproduce the well-known EF protocol as translated by the adapter. (The only thing I'd add is that I'm sure the RF protocol should be easy enough to use.)
 
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uri.raz

EOS 80D
Jan 5, 2016
149
101
That makes no sense. You may as well just use their EF lenses with an adapter in that case.
That forces the designer to use EF flange distance, and the users to use the adapter, which some people don't like.

The main point I was making is that reverse engineering will never be as good as native autofocus. Also no guarantee of future camera compatibility.
True.
 
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uri.raz

EOS 80D
Jan 5, 2016
149
101
Uri was totally right. You completely miss the point.

Using their EF lenses on an adapter doesn't allow them to take advantage of the far better film-flange distance to make a far sharper/compact/cheaper lens.

Uri's only talking about the protocol of communication.

And as I've been doing computer protocols for 30 years, I totally agree with his point that if a lens maker can't reproduce the RF protocol at first, they could reproduce the well-known EF protocol as translated by the adapter. (The only thing I'd add is that I'm sure the RF protocol should be easy enough to use.)
I'll elaborate on that.

If they use an adapter, the lens is EF forever. If they use RF mechanically & electronically, they can pretend to be EF mounted via an adapter in the first version, then upgrade the firmware later on with RF protocol later on.

This might require to make better hardware (stronger AF engine, spare processing abilities, etc), but AF now + possibility of upgrade makes for a much more attractive lens than 'MF now, AF never' or 'EF w/ adapter forever'.
 
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Trey T

EOS 80D
Feb 6, 2019
108
55
according to Cinema5D, SamYang will build native RF mount lens. The diagram of the two lenses shows the rear lens is at the flange, making it to be a native RF lens. However the sample photo of lens is very deceiving...
 

JoFT

I do love photography
Nov 9, 2014
219
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Germany
delightphoto.zenfolio.com
Meanwhile I was able to finish my review on the 85mm f1.4...

After first mixed feelings: I am pretty excited about the lens. In terms of the results you get from this lens: it is just wow!!! Very decent images, excellent image quality - if you know how to use the lens.

For whom is this lens for?

It is made for owners of the R-Mount cameras - but the EF version will show similar results.
When to take the RF Mount version instead of the EF mount? This is a very good question. For my taste: if you have decided to got with the R-Mount and/or you do discontinue with EF Mount: go for it. It is lighter and easier to handle.
It is more a lens for enthusiasts, for people who like to shoot manual focus
But manual focus is so much fun to use on the Canon mirrorless cameras....
But the lens has a bit of weaknesses too:

It is not native RF: I guess a lens designed for the 54mm bajonett diameter and the short flange distance can be even smaller and lighter
It is not weather sealed
I miss an EXIF chip - this would be even better
And the 1.1m minimum focal distance is a sad thin: I would prefer it mach shorter, even shorter than the usual 85 mm...
I give the lens a highly recommended!!!

For more information please look at my review here https://delightphoto.zenfolio.com/blog/2019/3/samyang-s-new-lenses-for-rf-mount-the-mf-85mm-f1-4