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PENTAX 645

 
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horhhe
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PostPosted: Aug 06, 2009 3:27 pm    Post subject: PENTAX 645 Reply with quote

Are cineva idee de un pentax 645 digital de 18 mpx..? cica ar fi aparut de ceva ani, numai ca eu sincer..nu am auzit nimik.
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MariusCTM
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PostPosted: Aug 06, 2009 3:31 pm    Post subject: Reply with quote

Da, a aparut de cativa ani, dar il au doar profesionistii.
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horhhe
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PostPosted: Aug 06, 2009 3:37 pm    Post subject: Reply with quote

bun, bun ..si unde il gasesc..nu apare in nici un magazin mai cunoscut.
mersi.
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dnmtsn
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PostPosted: Aug 07, 2009 12:17 pm    Post subject: Reply with quote

din cite stiu eu pentax tot anunta de prin 2005 un aparat digital pe format mediu si arata diverse prototipuri pe la showurile importante din domeniu, insa nu au lansat niciodata nimic, pentru profesionisti sau nu. Din cind in cind anunta ca proiectul e inchis, dupa care il "invie" la loc, insa aparat pe piata nu a aparut. Unul din cele mai recente anunturi e din martie de la PMA Las Vegas: http://www.pma-show.com/0548/pentax/digitalcameraback/pentax-645/
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snowdog
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PostPosted: Aug 07, 2009 1:11 pm    Post subject: Reply with quote

Very Happy Interesant, nici nu stiam ca ar fi capabili de asa ceva. Se pare ca l-au abandonat pe ce de 18 MP.

Acum 2 ani se laudau cu cel de 31 MP

http://www.digitalcamerainfo.com/content/Pentax-Announced-31-MP-Medium-Format-Camera-and-Accessories.htm.

Probabil ca anul asta vor anunta unul de 50 MP.
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horhhe
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PostPosted: Aug 10, 2009 9:40 am    Post subject: Reply with quote

sunt convins ca vor fi primii care vor scoate un astfel de aparat.
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ggl
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PostPosted: Aug 10, 2009 11:33 am    Post subject: Reply with quote

Dar deja exista aparate foto de 50 mp pe piata, de la Phase One/Mamiya si Hasselblad.
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Luck
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PostPosted: Aug 10, 2009 2:47 pm    Post subject: Reply with quote

Si f. important LEAF Wink ....

N-as uita nici de backurile digitale, pt Contax 645, Minolta, Rolley, Hassy..

Dar sigur, atunci cand o sa apara, Pentax 645 D, o sa fie probabil prima pe montura Pentax 645.... Very Happy
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sidecenu
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PostPosted: Aug 10, 2009 3:19 pm    Post subject: Reply with quote

Luck wrote:
N-as uita nici de backurile digitale...
Cand o sa apara, Pentax 645 D, o sa fie probabil prima pe montura Pentax 645.


Pai backurile digitale sunt pe moarte, incomode si nepractice.
Fotografii vor aparate integrate.
Ma bucur ca sunteti optimist, dar ma tem ca Pentax n-are forta pentru asa ceva.
De fapt acum pe patroni ii cheama Hoya.
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ggl
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PostPosted: Aug 10, 2009 8:12 pm    Post subject: Reply with quote

Da, Luck, voiam sa zic si de Leaf dar nu eram sigur si am preferat sa nu spun prostii. In loc de Minolta probabil voiai sa spui Mamiya?

Eu cred ca vor exista in paralel cele doua concepte: cel monobloc si cel modular. In cazul aparatelor foto de format mediu conceptul modular, cu magazii interschimbabile, este frecvent intalnit. Daca cuplajul magaziei este standard deschis cum e la Mamiya/Phase One, poti monta o magazie digitala produsa de orice alt producator (de ex Leaf). In cazul conceptului monobloc, aparatul va fi mai putin costisitor, insa va trebui schimbat cu totul in cazul unui upgrade. Acest lucru n-ar fi o problema prea mare, intrucat costul aparatului este de obicei o fractiune din costul magaziei digitale.
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lunetistul
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PostPosted: Aug 10, 2009 9:53 pm    Post subject: Reply with quote

Saptamana trecuta am fost pe o insula din Pacific si am intrat intr-un muzeu (muzeul balenelor)...era acolo si o camera cu tot felul de aparate de sunete,lasere...etc printre care si doua aparate Pentax..am aflat ca mai toate imaginile au fost trase cu Pentax... si nu cred ca nu-si permiteau altceva....nu am intrat in detalii ,insa am auzit multe de bine despre Pentax.
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montecarlo
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PostPosted: Aug 10, 2009 11:09 pm    Post subject: Reply with quote

Pana una alta nu au nici 'FeFeu' doar 'half-frame'.. si nici 645 nu cred ca va avea un senzor ~6x4,5 cm (ci mai mic, astfel va fi prezent, din nou, un factor de 'crop'/decupare) Wink
Oricum, din cate stiu doar Phaze One are un senzor (back digital) de 6 x 4,5 cm. Poate ma insel.
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dnmtsn
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PostPosted: Aug 11, 2009 10:07 am    Post subject: Reply with quote

senzorul pentax nu e half-frame, e APS-C (ceva mai mare). Cel de la 4/3 e half-frame. Si oricum asta nu are mare legatura cu posibilitatea de a avea un senzor digital pe format mediu; sint destui producatori de senzori MF care nu au nici o oferta de senzor "full-frame"...
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ggl
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PostPosted: Aug 11, 2009 10:39 am    Post subject: Reply with quote

De obicei sunt 48x36, insa variaza in functie de magazia digitala. Parca doar Leaf au ceva magazii apropiate de 54x41.5 mm (aptus 33) inafara de PhaseOne P65+ (care oricum merge doar pe formate mai mari decat 60x45 mm).
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montecarlo
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PostPosted: Aug 11, 2009 11:58 am    Post subject: Reply with quote

dnmtsn wrote:
senzorul pentax nu e half-frame, e APS-C (ceva mai mare). Cel de la 4/3 e half-frame. Si oricum asta nu are mare legatura cu posibilitatea de a avea un senzor digital pe format mediu; sint destui producatori de senzori MF care nu au nici o oferta de senzor "full-frame"...


Deloc Wink ia vezi: FF/35mm= 36x24 mm , DX (APS-C e putintel mai mic) = 24 x 16mm iar Oly (4/3) e 17x 13mm deci un sfert din FF/35mm Very Happy . Calculeaza doar suprafata senzorilor vi vei vedea ca APSC/DX e la jumatate cat FF si 4/3 la jumatate cat APS-C/DX Exclamation

Practic 'full frame' / FX = formatul 135 (pe film http://en.wikipedia.org/wiki/135_film ), DX/APS-C = formatul APS (C) (pe film http://en.wikipedia.org/wiki/Advanced_Photo_System ) iar 4/3 = formatul 110 (pe film http://en.wikipedia.org/wiki/110_film ).
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dnmtsn
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PostPosted: Aug 13, 2009 1:53 pm    Post subject: Reply with quote

alles klar. traiasca wikipedia
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cristi_f
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PostPosted: Aug 18, 2009 12:17 pm    Post subject: Reply with quote

Hasselblad are de ceva timp un senzor care acopera 94% din formatul 645 (vezi link -> H3DII60 ). Mai mult, recent au lansat un nou back CFV39 destinat in special posesorilor de camere din seria V (link aici).

In atari conditii probabil Pentax 645(D?) va avea aceeasi soarta ca si Contax 645. RIP.
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ggl
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PostPosted: Aug 18, 2009 1:42 pm    Post subject: Reply with quote

cristi_f wrote:
In atari conditii probabil Pentax 645(D?) va avea aceeasi soarta ca si Contax 645. RIP.


Contax 645 macar exista, iar Leaf mai produce inca magazii digitale pentru el. Pentax 645D nici macar nu exista, iar viitorul sistemului respectiv este cel putin incert.

http://www.foto-magazin.ro/stire.php?id=5250
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DanPavel
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PostPosted: Nov 20, 2009 11:37 pm    Post subject: Reply with quote

Se pare ca exista un digital back fabricat in China pentru Pentax 645 :
http://photo.net/medium-format-photography-forum/00SD4n
Daca stie cineva mai multe rog sa posteze.


Last edited by DanPavel on Nov 21, 2009 3:49 pm; edited 1 time in total
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neamarin
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PostPosted: Nov 21, 2009 7:52 am    Post subject: Reply with quote

Eu am vazut o comparatzie intre HB si Nikon D3 (asta din urma cu oleaca de postprocesare) si aratau la fel.

Avantajul MF digi? In studio si la mariri extreme sau pe teren, peisaj.

Obiective lungi & rapide pentru subiecte-n mkiscare? Neam! Si costa de te usuca: cu 30K parai itzi tragi un sistem trasnet de 24MB cu obiective care acopera de la 14mm la 600mm.

O varianta muult mai sensibila ar fi un MF pe film (diapozitiv): costuri mult mai mici (dar nu gasesti multe firme care mai developeaza gigi format mediu, nu stiu daca-n Bucureshti o mai fi cineva); combinat cu un digi ieftin de format mic (al carui ecran itzi da perfect expunerea) e un sistem la care puteai doar visa acum 10 ani.

Mie mi se pare ca platesti mult prea mult pentru "spate" digital pentru lipsa de flexibilitate aferenta. Si, n.b., sunt unul dintre cei care shi-ar fi putut oferi, de pan-plezir, asha ceva cu muuulta vreme-nainte.

Daca *nu* ai tzug sa faci pe cate 10K parai cate o poza de 3x3 metri -n campanie electorala vreunui cantidat, sau vreo campanie publicitara, di she sa ti oboseshti pentru asha ceva?

O repet: in MF (digi/film) ai probleme cu varietatea de alegere a obiectivelor: un burduf macro pentru Bronica (aparate care acum le iei foarte ieftin second hand) costa (nou) prin 2000 vreo 1600 parai.... Da' pe astea *nu* le gaseshti second hand...

Desigur, o proiectzie de 6x6 a unui diapo (facuta-n dulcele stil clasic, adica pur optic, nu digital), loveshte lumea-n moalele capului. Dar asta-i de pe MF pe film...
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zeus_s_father
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PostPosted: Mar 10, 2010 2:57 pm    Post subject: Reply with quote

Buna ziua, inca un zvon despre Pentax 645 digital, un zvon destul de plauzibil, vin cu link:
http://www.dpreview.com/news/1003/10031002pentax645d.asp
La un pret destul de accesibil[nu pentru mine] dar comparativ cu celelalte camere de format mediu.

Toate cele bune, Mihai.
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MariusCTM
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PostPosted: Mar 10, 2010 3:50 pm    Post subject: Reply with quote

Ce zvon?
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csr
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PostPosted: Mar 10, 2010 3:56 pm    Post subject: Reply with quote

Nu e zvon, e pe bune!
http://www.foto-magazin.ro/stire.php?id=5739
si un nou obiectiv:
http://www.foto-magazin.ro/stire.php?id=5740
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MariusCTM
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PostPosted: Mar 10, 2010 3:57 pm    Post subject: Reply with quote

Sorry! Era o replica la "zvonul" de mai sus!
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csr
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PostPosted: Mar 10, 2010 4:01 pm    Post subject: Reply with quote

Si eu la fel!
Mai ales ca stirea e pe Foto-Magazin pusa de azi dimineata.
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Pandy
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PostPosted: Dec 10, 2010 5:14 pm    Post subject: Reply with quote

Se pare ca 645D chiar va fi lansat ...
Dar ... pret body 8.999 LIRE
40 mpx aruncati gramada tinand cont ca la valori ISO nu sta prea bine ... 200-1000 cu posibilitate de extindere - 1600 - 6400 - 12800 si sa nu uitam altceva important 1.480 grame (cu card si baterie)

Chiar se merita?

http://www.pentax.co.uk/en/group/128/product/645D/body/overview/Photo_Cameras.html
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mortu'
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PostPosted: Dec 10, 2010 5:24 pm    Post subject: Reply with quote

Vezi ca pretul si greutatea sunt avantaje ale acestui model fata de concurenta.
In rest iti urez sony usor...
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Pandy
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PostPosted: Dec 10, 2010 8:19 pm    Post subject: Reply with quote

mortu' wrote:
Vezi ca pretul si greutatea sunt avantaje ale acestui model fata de concurenta.


M-am uitat si la concurenta, mai exact la cel cu care este in concurenta directa, si anume, D3x. Greutate: 1220 g Pret: 5499 lire
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dughir
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PostPosted: Dec 10, 2010 8:45 pm    Post subject: Reply with quote

Pandy wrote:
mortu' wrote:
Vezi ca pretul si greutatea sunt avantaje ale acestui model fata de concurenta.


M-am uitat si la concurenta, mai exact la cel cu care este in concurenta directa, si anume, D3x. Greutate: 1220 g Pret: 5499 lire


Comparam mere cu pere? Very Happy
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gabib
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PostPosted: Dec 10, 2010 9:45 pm    Post subject: Reply with quote

http://www.luminous-landscape.com/reviews/cameras/2010_mini_medium_format_shoot_out.shtml
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Last edited by gabib on Dec 15, 2010 11:19 am; edited 1 time in total
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MariusCTM
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PostPosted: Dec 10, 2010 11:31 pm    Post subject: Reply with quote

Deci, alta liga! Laughing
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Skytalker
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PostPosted: Dec 11, 2010 12:58 am    Post subject: Reply with quote

Nu toata lumea este in extaz, daca e sa il credem pe KR. Iata: http://kenrockwell.com/pentax/645d/index.htm. Dar in fine...
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Pandy
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PostPosted: Dec 11, 2010 6:47 am    Post subject: Reply with quote

dughir wrote:
Pandy wrote:
mortu' wrote:
Vezi ca pretul si greutatea sunt avantaje ale acestui model fata de concurenta.


M-am uitat si la concurenta, mai exact la cel cu care este in concurenta directa, si anume, D3x. Greutate: 1220 g Pret: 5499 lire


Comparam mere cu pere? Very Happy


Nu eu Smile

Uitati aici un test al celor de la AP de unde m-am informat si eu ca tot omu' Wink (nu aveti nevoie de cont)

http://www.filehost.ro/1616405/Amateur_Photographer_December_4_2010_pdf/
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mortu'
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PostPosted: Dec 11, 2010 8:29 am    Post subject: Reply with quote

Ken Rockwell?

Devine din ce in ce mai interesant...
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MariusCTM
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PostPosted: Dec 11, 2010 8:37 am    Post subject: Reply with quote

Pandy wrote:


Uitati aici un test al celor de la AP de unde m-am informat si eu ca tot omu' Wink (nu aveti nevoie de cont)

http://www.filehost.ro/1616405/Amateur_Photographer_December_4_2010_pdf/


Aia sunt "amatori", singuri isi zic asa!
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montecarlo
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PostPosted: Dec 11, 2010 2:41 pm    Post subject: Reply with quote

dughir wrote:
Pandy wrote:
mortu' wrote:
Vezi ca pretul si greutatea sunt avantaje ale acestui model fata de concurenta.


M-am uitat si la concurenta, mai exact la cel cu care este in concurenta directa, si anume, D3x. Greutate: 1220 g Pret: 5499 lire


Comparam mere cu pere? Very Happy


Adevarat. FM (formatul mediu) e alta categorie Wink .. nu se foloseste la sport, pasari sau pesti Laughing .. deci la cei ai nevoie de iso peste 800.. cand majoritatea obiectivelor au f:2.8 Wink)
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