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Wide Angle rangefinder lenses on a7R, a first test

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darosa View Drop Down
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Post Options Post Options   Quote darosa Quote  Post ReplyReply Direct Link To This Post Topic: Wide Angle rangefinder lenses on a7R, a first test
    Posted: 26 October 2013 at 19:51
These shots were taken today October 26, 2013 on a preproduction Sony a7R. They are straight out of camera JPEGs.
Lens (Voigtlander 12mm, 15mm and 21mm) and aperture is mentioned in the title of each photo.
In all photos focus was @ about 1 meter. Photos were taken in Rotterdam Zoo (Blijdorp) and the, willing, model is Gustav Kiburg aka ijsvogel, who was so kind as to let me use his a7R for this test. Thanx a lot Gustav! .

Full size JPEGs on my Flickr site (clicking on a photo will take you there).

1 CV 12 F5.6


2 CV 12 F8


3 CV 12 F11


4 CV 12 F16


5 CV 15 F4.5


6 CV 15 F5.6


7 CV 15 F8


8 CV 15 F11


9 CV 15 F16


10 CV 21 F4


11 CV 21 F5.6


12 CV 21 F8


13 CV 21 F11


14 CV 21 F16



Again: these were taken with a pre-production camera and pre-production firmware!
And: no Gustav was hurt in the making of these photos!
 



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Sublimity View Drop Down
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Post Options Post Options   Quote Sublimity Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:00


The a7R doesn't seem to be a big improvement over the a7 despite the additional corner modifications. A7 samples here:http://www.flickr.com/photos/ronscheffler/
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Bob J View Drop Down
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:06
Looks very reasonable to me..
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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:18
Shooting raw and cornerfix will take care of this I think.
What's more important is that the corners still look quite sharp and no smeared. For instance the bird near the corner in the V12 f8 shot does look very respectable. Thanks for testing and sharing Leo (and Gustav for joining the party with the a7R)
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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Post Options Post Options   Quote rovhazman Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:28
Thank you Leo and Gustav!!!

I am viewing it on my phone now (waiting for this thread...) and it looks good to me - yes, dark corners with color shift, but no smears. The 21/4 looks better than on my NEX 7.
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Post Options Post Options   Quote TheEmrys Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:31
Prepare for SAR to lift photos (and smear both photographer and model) in 5... 4... 3.... 2....
a7II, a6000 - Sony 28/2, 21mm converter, 55/1.8, 16-70/4, Minolta 28-135, 100/2, 80-200 HS G, Minolta 100-300 APO D,MD 35-70/3.5, MC 50/1.4
 



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Post Options Post Options   Quote TheEmrys Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:36
*Nevermind* Thought I saw something odd. Carry on. Nothing to see here.
a7II, a6000 - Sony 28/2, 21mm converter, 55/1.8, 16-70/4, Minolta 28-135, 100/2, 80-200 HS G, Minolta 100-300 APO D,MD 35-70/3.5, MC 50/1.4
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Post Options Post Options   Quote tigertimb Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:36
Originally posted by rovhazman rovhazman wrote:

The 21/4 looks better than on my NEX 7


Not just that, but looking at the images and the APS-C crop from the centre of each, that region is always completely clear of any noticable colour shift.

This already shows a big improvement in performance, even if the fullframe corners show issues. And also means that you have a wider usable area from each lens than you would have done when used with a NEX, even before you apply any correction to the corners.

And agree with Pieter, it looks to be just colour shifts, and as I understand it, even a Leica suffers the same problems and applies software corrections with lens profiles.
Tim
If you appreciate comments on your photos, how about returning the favour to others . . .
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Post Options Post Options   Quote tigertimb Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 20:37
And thank you Leo and Gustav
Tim
If you appreciate comments on your photos, how about returning the favour to others . . .
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darosa View Drop Down
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Post Options Post Options   Quote darosa Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 21:23
Originally posted by tigertimb tigertimb wrote:

Originally posted by rovhazman rovhazman wrote:

The 21/4 looks better than on my NEX 7

and as I understand it, even a Leica suffers the same problems and applies software corrections with lens profiles.


That's right Tim. They have in-camera Cornerfix. I read somewhere that Sony also might bring software solutions at a later date (but that may be wishful thinking).

And Shay: the 21 was a positive surprise for me too. The 15 is notorious for colour shift, and these photos show why.

This was a very quick and dirty test. We didn't have much time because Gustav wanted to use the camera too (results will be elsewhere on the forum soon). I wanted to make these shots because the weather (blue skies) was excellent for showing colour shift. There will be more time tomorrow (but cloudy/rainy weather is expected) and I hope to make some comparison shots with non-RF lenses; and also with some less extreme wide angles; and also with focus @ infinity.

BTW: that camera is a very sexy thing. The smallness of the NEX is gone but I suppose it is still pocketable (in big winter coats )
I like the shutter sound: it's quite distinct, but not too loud; but I'm not the best judge of sounds of course.
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darosa View Drop Down
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Post Options Post Options   Quote darosa Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 21:39
BTW: did you spot the moire in Gustav's shirt on some photos!
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Atto View Drop Down
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Post Options Post Options   Quote Atto Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 23:28
Not only on the shirt also on the chair.
how much will the final firmware improve ?
A7R3;RX1r2;A99;A900;E-Mount FE 85 1.8; Batis 18 2.8;LA-EA3;A-Mount ZA 24 2.0; Sony 50 2.8 macro; 1.4 TC; Sigma 105 2.8 EX DG macro; Minolta 200 2.8 G HS; 400 4.5 G HS
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Alex H View Drop Down
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Post Options Post Options   Quote Alex H Quote  Post ReplyReply Direct Link To This Post Posted: 26 October 2013 at 23:58
Originally posted by darosa darosa wrote:

We didn't have much time because Gustav wanted to use the camera too


I can see the strategic problem here. Leo, You need to use something else other than coffee to distract Gustav...

The results are actually very good.

Small print: I wish those who complain the most about the color shift with non-retro-focus UWA lenses would learn a little bit more about the basic optics and the complexity of lens design, before posting on SAR and other blogs, which main and only intention is to attract internet traffic...
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darosa View Drop Down
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Post Options Post Options   Quote darosa Quote  Post ReplyReply Direct Link To This Post Posted: 27 October 2013 at 00:11
traffic = money

Thanks Alex, you're quite right. But, to be fair, I think this article was linked on SAR too.
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