Vand sau schimb un obiectiv Cinematic SAMYANG 135 mm t 2.2 ED UMC VDSLR MK II - SONY FE - montura SONY Full Frame

Varianta cinematica, conceput pentru videografie, cu diafragma clickless si inele de ghidaj (poate fi folosit bineinteles si pe foto).

Ca si optica, este identic cu Samyang 135mm f 2.0 ( t stop fata de f stop masoara exact cata lumina ajunge pe senzor, foarte necesar in cazul videografilor pentru nu a avea schimbari de expunere. F stop este practic un raport, masoara deschiderea lentilei fara a lua in calcul pierderile de uminozitate datorate sticlei. De aici mica diferenta intre f2.0 si t2.2, este aceeasi deschidere a diafragmei, dar t-ul masoara lumina efectiva)

Aceasta este a 2-a varianta a acestui obiectiv, UMC mark II.

Obiectivul este in stare foarte buna, inelele de diafragma si focus se misca lin si cursiv.
Este un obiectiv cu o optica superba, reviewurile de specialitate il compara cu Zeiss-ul Sonnar T 135 f2, pe care aparent chiar il surclaseaza in testele de sharpness.

Ideal pentru filmare, peisaje, cadre unde este nevoie de un obiectiv telephoto.

De asemenea, datorita diafragmei deschise de f 2.0 (t 2.2), poate fi folosit pentru astrofotografie.

Montura este SONY FE Full Frame, putand fi folosit bineinteles si pe crop.

- corp durabil, metalic, din aliaj de aluminiu
- optica cu 11 elemente in 7 grupuri
- 1 element asferic (elimina practic aberatiile cromatice si alte tipuri de aberatii optice (astigmatism), nevoie crescuta mai ales la obiectivele foarte luminoase cu diafragma foarte deschisa): 1 element asferic din sticla si un element asferic hibrid.
- elemente de sticla ED si high refraction (sticla cu dispersie scazuta - reduce aberatiile cromatice si vignetarea pe colturi)
- tratament super multi coating
- diafragma cu 9 lamele rotunjite
- cursa inelului de focus este de 180 de grade, asigurand un focus manual extrem de precis, lin si fin
- UMC - tehnologie patentata de Samyang, constand in coating multi-layer "Ultra Multi Coatings", dezvoltat pentru a permite o transmisie maxima a luminii prin lentile si reducerea efectelor de tip flare si ghost.
- Filet filtru 77 mm

Imagini foarte sharp la toate focalele si in tot planul imaginii. Fotografii reale, asigur proba.

Un review mai amanuntit aici:

www.pcmag.com/reviews/samyang-135mm-t22-vdslr-ii-ed-umc

"The Samyang 135mm T2.2 VDSLR II ED UMC ($649) is a lens that delivers images with incredible clarity, even at its widest aperture, captures a heck of a lot of light, and features geared operation for cinema use. It matches up with one of the best 135mm primes we've tested in terms of sharpness, the Zeiss Apo Sonnar T* 2/135. While it doesn't offer the superb metal construction of the Zeiss lens, it's much less expensive, available for all major camera systems, and just as worthy of being named Editors' Choice."

"The Samyang 135mm T2.2 VDSLR II ED UMC delivers incredible clarity at a very reasonable price point. It's less than a third of the price of the manual focus Zeiss Apo Sonnar, and outperforms it in terms of pure sharpness. The Zeiss has a true apochromatic design, which completely eliminates color fringing, but I didn't find fringing to be an issue with the Rokinon lens during field testing. Cinematographers will appreciate the geared design and clickless aperture, but photographers are better served using the standard version of the lens. Regardless of your preference, you'll be very pleased with the performance, especially at this price point. The lens is an easy pick for our Editors' Coice award."