CP+ : Ibelux 40 mm f/0,85 en monture Sony E

[FredEspagne]

Tous les objectifs ciné sont spécifiés en T, un exemple pour les moins chers dans la gamme Samyang: http://www.samyang.co.uk/index.php/vdslr-lenses-cine

[Mistral75]

Le HandeVision Ibelux 40 mm f/0,85 est désormais en vente en Europe, distribué par Walser. Son prix public conseillé est de 1.799 €.

http://www.handevision.de/en/en-verkaufsstart-fuer-lichtstaerkstes-objektiv-der-welt/

[Mistral75]

Essai de l'objectif HandeVision Ibelux 40 mm f/0,85, mais sur Fujifilm X-T1, par Digital Camera Watch :

http://www.chassimages.com/forum/index.php/topic,175880.msg4811093.html#msg4811093

[Mistral75]

Repéré et signalé par Nikojorj sur un autre fil, essai de l'objectif HandeVision Ibelux 40 mm f/0,85 par Roger Cicala (Lens Rentals), qui l'appelle d'ailleurs "Ibulex" une fois sur deux :

http://www.lensrentals.com/blog/2014/08/kipon-handevision-ibelux-40mm-f0-85

L'essayeur est enthousiaste quant aux qualités optiques et mécaniques, le bokeh est parfois un peu fouillis (l'objectif souffre d'astigmatisme en périphérie d'image).

[airV]

L'essayeur est enthousiaste quant aux qualités optiques et mécaniques, le bokeh est parfois un peu fouillis (l'objectif souffre d'astigmatisme en périphérie d'image).

au niveau de la captation de la lumière, si j'en juge par les images ça semble quand même à mille lieux de ce que fait un noctilux, c'est tout plat 

[Mistral75]

C'est la version pour Fujifilm mais ça reste intéressant : première partie de l'essai de Fujirumors, avec des RAF (RAW sauce Fuji) disponibles au téléchargement :

http://www.fujirumors.com/ibelux-40mm-f0-85-unboxing-field-fujirumors/

[Mistral75]

Deuxième partie de l'essai, toujours avec des RAF disponibles au téléchargement (mais aussi les jpeg téléchargeables en pleine définition) :

http://www.fujirumors.com/wide-ibelux-40mm-f0-85-hands-review-samples-fujirumors-part-2/

[Mistral75]

Essai de l'objectif HandeVision Ibelux 40 mm f/0,85 sur NEX-6 et Alpha 6000 par Admiring Light avec de nombreuses photos illustratives :

http://admiringlight.com/blog/review-handevision-ibelux-40mm-f0-85-sony-e-mount/

Pros

    Good central image sharpness at wide apertures and very sharp in the center stopped down
    Outstanding bokeh when focused closer up
    Simply beautiful and unique look when shooting closer up at wide apertures
    Ultra-fast f/0.85 aperture for very shallow depth of field shooting

Cons

    Extremely large and very heavy
    No tripod collar
    Image edges are soft, even stopped down
    Very high spherical aberration at wide apertures (leads to that great rendering above, but it can't be turned off)
    Notable chromatic aberration
    Very high purple fringing at wide apertures
    Extreme vignetting at f/0.85
    Bokeh is busy in the foreground and when focused at further distances
    Un-damped focus ring
    Long minimum focus distance
    Extremely expensive

The Ibelux 40mm f/0.85 is an extremely unique lens: It has the fastest aperture of any current interchangeable lens on the market.  When used for portraits or closer subjects, the 40mm can produce images with a truly magical feel to them.  If you enjoy this low contrast look, it delivers in spades.  Shooting wide open, the lens produces good central image sharpness and excellent background bokeh, and you get this lens to shoot wide open.

However, this great look can only take you so far, and the truth is, the lens does one thing really well, and beyond that the Ibelux 40mm f/0.85 just really isn't a very good lens.  It has tons of lens aberrations, mediocre borders at small apertures, very high purple fringing, and low contrast.  Then there's the fact that the lens is absurdly large and heavy, and exceedingly expensive for what amounts to mediocre performance in most situations.

Frankly, it's a lens that is essentially impossible to recommend. If you are a Sony shooter and want an ultra-fast native lens, the Mitakon 50mm f/0.95 will actually produce more background blur, and it costs less than half what the Ibelux costs and weighs significantly less.  If you are shooting Micro 4/3, sacrifice the 1/3 stop of aperture and get the Voigtländer 42.5mm f/0.95 – it's a much better lens overall and a fraction of the size.

If you shoot Fuji or simply must have something in the 40mm range with this speed, adapting an old fast manual focus lens and adding a SpeedBooster is the more sensible way to go as well.  My Canon FL 55mm f/1.2 with Speed Booster (39mm f/0.9) costs a total of $625 ($225 for the lens and $400 for the Speed Booster), weighs half what the Ibelux weighs, and generally outperforms it.  It has much higher contrast and similar sharpness wide open, while massively outperforming it at smaller apertures and further focus distances (though the Ibelux produces notably smoother bokeh close up).

The enormous size makes it uncomfortable to use, a pain to carry and something you are far more likely to leave at home when you pack your bag. And simply put, given the overall performance of the lens, the asking price of $2,070 US is absurd. To put the weight and cost of the lens in perspective, for the price of this lens, you could buy a brand new Sony A7 full frame body, an adapter and a Minolta Rokkor 58mm f/1.2 (which will give you a very similar look in focal length and background blur).  The resulting Camera AND Lens together would weigh 2/3 of a pound less than the Ibelux 40mm by itself, while saving you a few dollars and producing better images.

While I love the look this lens produces up close, there are simply too many flaws outside of the main usage scenario and too many better options for a fraction of the cost and weight.  I applaud IB/E Optics for daring to produce such a design, but unfortunately, in the real world, it's simply a lens that doesn't make sense.

[airV]

Essai de l'objectif HandeVision Ibelux 40 mm f/0,85 sur NEX-6 et Alpha 6000 par Admiring Light avec de nombreuses photos illustratives :

il n'y a pas énormément de photos prises en ambiance sombre, mais pour celles qui le sont je continue de trouver cela très plat par rapport à la lumière que va chercher le noctilux et le modelé qui en résulte....

je sais ça n'est pas du tout le même prix, mais le résultat est au moins aussi disproportionné