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Brian W. Allan

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Posts posted by Brian W. Allan

    Lenses should have megapixel ratings

    In: Cameras

    Posted

    This would be near useless for me and most folks I work with. Any modern production lens will resolve enough detail to keep you from getting a pink slip. I wouldn't project some lenses 40' tall but for youtube or even broadcast I would rank a lens' resolution numbers near the lowest of important characteristics for my uses as a cinematographer. The overall aesthetic performance of a lens is what matters, followed closely by ergonomics. The former is not something a lens review will tell you much about. You might be able to spot some bokeh and vignetting characteristics, but short of renting it and pointing it at a person and looking at them in a few sizes you won't know much about a lens. The only reviewer I see doing any work like this is Lloyd Chambers of Diglloyd.com: his in-depth reviews, aperture series, and expert commentary are worth every penny of his subscription costs.

    When the Sigma art 35mm 1.4 came out I rented it for a comparison to my beloved Zeiss ZE 35mm 1.4, and yes the Sigma could have an edge in resolution in some scenarios, but the Zeiss trounced it in terms of pure image harmony. Switching blind A/B on the monitor my crew all settled on the Zeiss. Just goes to show you DxO mark resolution numbers should not be a huge consideration in your purchases unless you are in the business of photographing and making reproductions of test charts.

    ​I could not agree more!  It is the "feel" of the lens that really counts, not a bunch of (sometimes) questionable testing.  Shoot the lens.  If it feels good and you like the results, it is a keeper!

    I shoot with a range of lenses.  Sometimes everything comes together and I get a few great shots, sometimes not.  But if I look at the lenses that have captured the spirit of a shot, it is quite often not the best, highest resolution, more expensive lens in the bag...

    Sony a7s purple noise

    In: Cameras

    Posted

     

    Hi guys,

     

    I've been testing a lot the a7s in low light and I've ran into some purple noise issue coming from the sensor. Sony canada is pretty useless about that...

    https://www.youtube.com/watch?v=zpvACzU1Nj0&feature=youtu.be

     

    I've tested it with 5 different A7s, they all do the same...In video mode, going under 1/50th with iso higher than 12 800, always give me that purple fringing (not as bad as the youtube video...witch is at the worst setting, but still, it's a bit frustrating) Technically, i know it doesn't respect the 180degree rule going under 1/50th for 24p/25p...but it could be useful is certain situation.

     

    At first, they blame the metabones ...just like everyone (ex:

    >

    )

     

    But after testing it with sony native FE lens....or with the body cap on... it's definitely not from light leak. What do you think about that?

     

    Thank you

     

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