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Sony 24-70mm F4 OSS - A7R

Discussion in 'Sony Alpha E-Mount Lenses' started by tbyork2014, Feb 8, 2014.

  1. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    Hi,
    Went out today with the A7R and 24-70/4 OSS. Thought I would share some images and my first thoughts of this lens. It fits very well with the A7R and is not too large or heavy, and is a great combo with the A7R for those who only wish to bring one lens.

    24mm:
    12385086063_0fcdc33859_b_d.

    12384959893_7cfa631ac5_b_d.


    70mm:
    12384866983_944e8e520f_b_d.

    12384928413_ecd3afa005_b_d.

    39-41mm:
    12384890603_3034709356_b_d.

    12384699665_ac80d3da05_b_d.

    It is very sharp wide open throughout the range. I gather some reviews have mentioned the 24mm corner sharpness is not very good wide open, but I did not find this to be the case (perhaps this is more due to the DOF effect rather than a characteristic of the lens). The OSS does not affect the corner/edge sharpness either (unlike the 28-70mm kit lens). Auto correction was set to on, and seems to control chromatic aberrations well in high contrast areas. The one minor criticism may be that the long end (70mm) although is still fairly sharp wide open, it is just a tad less so compared to the rest of the range (simply because of how sharp this lens is through the rest of the range, especially at 24mm).

    BTW, it was raining here in Oxford, and I was glad the lens and camera are fairly well sealed and safe to use in the rain. Let me know if people are interested in links to the full-sized images.

    Boon
     
    • Like Like x 14
  2. davect01

    davect01 Super Moderator

    Aug 20, 2011
    Fountain Hills, AZ
    Dave
    Great set, really like the fence.
     
  3. Snowy

    Snowy TalkEmount Veteran

    218
    Nov 18, 2013
    Melbourne, Australia
    Barry
    Thanks for sharing your thoughts on this lens and photos. The first fence image is my favourite.
     
  4. serhan

    serhan TalkEmount All-Pro

    Aug 27, 2011
    NYC
    Thanks for the photos and short review. It will be helpful if you can post the 24mm shots full size.
     
  5. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    +1, thanks from me too.
     
  6. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    Hope these work.
    12385086063_a0938fda11_o_d.

    12384959893_1041fbcffc_o_d.

    Boon
     
    • Like Like x 3
  7. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    Thanks for those. Given these are taken wide-open at 24mm I'm positively surprised by the image quality, only the corners seem to suffer but a large part of the image is quite sharp. The best legacy 24mm prime I have, an Olympus OM 24/2.8, won't beat it at f/4.
     
  8. mattia

    mattia TalkEmount Regular

    143
    Dec 13, 2013
    Very nice indeed, thanks for the images! The initial reports on the 24-70 I read seemed a little 'blah' to me, particularly the corner performance but like Ad, I'm positively surprised. Will need to have a hard think though. Basically, I want the lens for the wideangle more than the telephoto - paired with an A7R it would make a great landscape set until an ultrawide native prime shows up (have an OM 21/3.5 to tide me over until then), as a lot of my favourite landscapes were made with the 24-105L on my 5DII. It's also almost exactly the same size and weight as the 12-40 for my E-M1, which is where the high expectations come in - that lens is stunning at 12mm, but the sensor on the A7R is nicer at base ISO with great technique and has a major resolution advantage. And when I travel (and thus would get the most use out of it) I won't take two standard zooms. Overkill.

    So. All primes on the A7R? Or just get a zoom...
     
  9. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    I do like zooms for their convenience, especially when they perform well IQ wise. There was a criticism about the performance of this zoom at 24mm by one of the early reviewers, which is the total opposite of what I have found with this lens. I actually think it is very sharp at 24mm even wide open. Which makes me think if there is a problem with that reviewer's copy of this lens?
    The added benefits are the OSS and the fact this is a native lens which benefits from the auto chromatic aberration correction in-camera as well as the vignetting correction. Sadly for some reason (as confirmed by dpreview in their review of the A7R), the distortion correction is inactive for this lens; perhaps this function will be implemented with the firmware update.
     
  10. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    Hi,
    I went out for a walk yesterday with the 24-70/4. Here are some of the shots.
    12640896924_96cf8fe959_o_d.

    12640632573_35072abd6f_o_d.

    12640690353_65f7d1ee39_o_d.

    12641169394_35433a9286_o_d.

    12641262974_c6ac466836_o_d.

    12640960533_fb95ddfaa3_o_d.

    I'll post more later.

    Boon
     
    • Like Like x 3
  11. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    Thanks a lot for sharing full-size images. In the fourth image the left part is distinctly less sharp than the center and right part. For me that would be enough reason to return the lens. Apart from that, the image quality certainly doesn't look too bad considering these are all taken wide open.
     
  12. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    • Like Like x 1
  13. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    Also in this series the last shot (at 24mm) is distinctly unsharp at the left and wickedly sharp in center and right half.
     
  14. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    Thanks for pointing this out. I've been thinking what could be the cause. I tried removing UV filter, lens hood, various hand holding techniques and then inactivating OSS, to see what could be the problem. I can tell you that the UV filter and lens hood are not the cause. It seems that handholding technique does play a role, even when shooting at much faster than 1/focal length. With OSS on, both corners are sharper when I use EVF and hold camera in normal against cheek position (i.e. Sharp throughout the image). If I used liveview with both hands or just one handed, this results in corner blur, which often is on the left but occasionally can be on the right. When OSS is inactivated, using either single hand or two handed liveview focusing resulted in corner to corner sharpness. So perhaps for 24mm f4 shooting it is better to inactivate OSS.

    I recall someone commenting about the 28-70 FE lens having corner blur when OSS was activated. I wonder if that reviewer was using liveview and hence not using as stable a hold? I think that OSS is not an excuse to be slack with camera shooting technique, and we need to respect the A7R sensor in order to do it justice especially at wider focal lengths which truly test the lens limit. This is less of an issue at longer focal lengths or smaller aperture, as there should be some buffer - but at 24mm focal length, it does test the full capability of the lens.

    Thought I would share this finding, partly done to reassure myself that it is not a defective lens (phheww).

    BTW, I found that when stopped down to f16, this lens could not achieve focus very well under low light (I was shooting a flower). Solution: switch live settings effects to off and voila fast AF returns even at small apertures. Surely this is a glitch in the A7R firmware which needs fixing.

    This is the flower:
    12663837113_9be2540459_o_d.

    Boon
     
    • Like Like x 2
  15. Utik

    Utik TalkEmount Regular

    170
    Feb 7, 2013
    Rimini, Italy
    Do you like trees? :D

    Thanks for the shots.
     
  16. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    Are these corners better? Both at 24mm f4 but OSS switched off.

    [​IMG]

    [​IMG]

    Boon
     
  17. tbyork2014

    tbyork2014 TalkEmount Regular

    84
    Jan 11, 2014
    I do like some trees. But I tend not to share personal/family photos online, so it is mainly landscapes and flowers that you will see me post.

    Boon
     
    • Like Like x 1
  18. serhan

    serhan TalkEmount All-Pro

    Aug 27, 2011
    NYC
  19. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    I'd say so. Maybe the left edge is a tad less sharp than the right edge, but the difference is rather small IMHO. This kind of performance would be acceptable to me given that the lens is used wide open. For my type of photography (landscapes, cityscapes) I would also check at smaller apertures to see if edges and corners sharpen up.

    I've had the same experience with my SEL-1018: sharpness could be different left and right with OSS and the difference is much less with OSS off. With OSS you kind of have to be lucky: if the moving lens parts are centered IQ will not be harmed. Maybe Zeiss is right after all with being reluctant to introduce OSS in their lenses.

    Again, thanks for sharing your experiences.
     
  20. addieleman

    addieleman Passionate amateur

    Nov 13, 2012
    Netherlands
    Ad Dieleman
    I think this is to be expected. With live settings effects on the lens stops down to the aperture set, f/16 in your case. The resulting light quantity on the sensor will be quite low then and focussing will be difficult for the camera. With live setting off the camera focusses with the lens wide-open and only stops down when taking the picture: more light for focussing so that'll go a lot better.