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Thread: A7RII owners, Let's talk about Base ISO Dynamic Range

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    A7RII owners, Let's talk about Base ISO Dynamic Range

    Well a few of you have had the A7RII for a few days now and a lot of us (who don't) are wondering what is the verdict on the base iso dynamic range. Is it an improvement over the A7R and the D810? Is it too close too call? Is it worse?

    There are thousands of posts on the A7RII image quality but have yet to read a definitive answer of those questions. Some testers/reviewers report one thing (that base iso DR is a tad better) others that is a tad worse.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Im in the better camp by about a 1/2 stop. ISO Im in the 2 stop advantage
    Photography is all about experimentation and without it you will never learn art.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    About the same as Guy mentions.
    Quentin Bargate
    Director of Bargate Murray, Law Firm of the Year 2012 - 2017, ”leading individual”, Chambers HNW guide, 2017, Photographer

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    I 3rd what Guy says against the A7R

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by rhern213 View Post
    I 3rd what Guy says against the A7R
    I second that!

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    DR is very good but I am finding that it is better to expose to the left as strangely highlight recovery seems to be better than shadow recovery which seems to show a certain amount of noise when you try to pull up detail.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Four owners seeing a 2-stop SNR advantage over A7R? .

    I respect all of you, but I have to put that in the too good to be true category. If the RAWs really look that way, then they have to be cooked. I hope I'm wrong!

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by Viramati View Post
    DR is very good but I am finding that it is better to expose to the left as strangely highlight recovery seems to be better than shadow recovery which seems to show a certain amount of noise when you try to pull up detail.
    Yep, as yet that's my observation too. However, no complains irt shadow recovery.
    Bart ...

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    That B&H discussion stated it has 14 stops of DR as base iso if that helps ...... this is my first a7x body so I have nothing to reference it to in the a7x line. Know it is much more than my a99.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by Jim DE View Post
    That B&H discussion stated it has 14 stops of DR as base iso if that helps ...... this is my first a7x body so I have nothing to reference it to in the a7x line. Know it is much more than my a99.
    Hmm. According to DXO the A7R has 14.1 EVs.
    With best regards, K-H.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by k-hawinkler View Post
    Hmm. According to DXO the A7R has 14.1 EVs.
    According to them, the A7s is below the A7r ( while Sony claimed 15.3 stops for the A7s).
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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by Vivek View Post
    According to them, the A7s is below the A7r ( while Sony claimed 15.3 stops for the A7s).
    Hmm, hmm! So Vivek, what do you consider correct values? TIA.
    With best regards, K-H.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Hi K-H, I can not quote numbers as I have no capability to quantify. I do know that the A7s is much better than the A7r. I do not accept this resizing to compare idea. Tiny pixels vs fat pixels. There is a difference and there are no two ways about it.
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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Ok, so more people are reporting about equal low iso DR in the A7RII. Big difference seems to be in the higher iso's. That should give the A7RII a much higher DXO score once they get their testing done.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Here is a THREAD I started to show how well the A7RII can be pulled down from extreme expose to the right situation.

    Not sure what the math is for dynamic range but I do know that the camera will not block up shadows or clip highlights in images shot on a sunny day.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    I just compared my A7II and A7RII dynamic range at ISO 100 and found very little difference between them. My best guess, less than half a stop difference in favor of A7RII.

    Here are the most revealing RAW files from the series I shot, taken at f/4, 1/3s, ISO 100: https://drive.google.com/file/d/0B93...ew?usp=sharing

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    That seems to be the what we all have been reporting. 1/2 stop on DR and a lot of us think around 2 stops on ISO which puts me exactly what I was after.
    Photography is all about experimentation and without it you will never learn art.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by Viramati View Post
    DR is very good but I am finding that it is better to expose to the left as strangely highlight recovery seems to be better than shadow recovery which seems to show a certain amount of noise when you try to pull up detail.
    I find ETTL consistently produces better results (to my taste anyway) with Sony cameras (and also to an extent with my M9 when I owned it.)
    Sony Visible Light & IR Photographer
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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    HiredArm
    Interesting you say that, since I too ETTL to a degree and prefer the results also and that inlcudes the M240. Do not have a Sony A7x, but a Sony sensor in my 645Z where I limit my ETTR to the 3/4's line whenever possible.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by Guy Mancuso View Post
    That seems to be the what we all have been reporting. 1/2 stop on DR and a lot of us think around 2 stops on ISO which puts me exactly what I was after.
    I haven't tested ISO formally yet, but my first shot at 25,600 surpassed my expectations:


    DSC00206 by Amin Sabet, on Flickr
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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by Amin View Post
    my first shot at 25,600 surpassed my expectations
    Remarkable. And at least to my eyes, the noise looks much like film grain. Most pleasing.

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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    Quote Originally Posted by MikeEvangelist View Post
    Remarkable. And at least to my eyes, the noise looks much like film grain. Most pleasing.
    Thanks, Mike. Here is the RAW in case anyone wants a play: https://drive.google.com/file/d/0B93...ew?usp=sharing


    And ISO 6400 is so clean, this one taken in silent shooting mode:


    DSC00209 by Amin Sabet, on Flickr

    RAW: https://drive.google.com/file/d/0B93...ew?usp=sharing
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    Re: A7RII owners, Let's talk about Base ISO Dynamic Range

    If I recall correctly, the RX1 still holds the best DR sensor rating on DXOMark (of Sony cameras). I have no way of quantifying what I see in the a7R II files but it "feels" like it just might be a hair better than the RX1.

    Regardless, the files are rich and malleable which is all I care about.
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