Prueba Tamron 17-50 mm. qué os parece?

[txus2006]

http://img9.imageshack.us/img9/5049/mg11191.jpg
By txus2006 (http://profile.imageshack.us/user/txus2006), shot with Canon EOS 50D (http://profile.imageshack.us/camerabuy.php?model=Canon+EOS+50D&make=Canon) at 2009-02-25

Acabo de sacar esta foto con mi nuevo cristal.
Es su 1ª foto.
Qué os parece? enjuiciar solo la calidad, se que el "paisaje" no es de lo mejor.
Quiero ver si este objetivo tiene la calidad que se comenta.Está sacada a pulso sin muchos miramientos. Y repito es una prueba.
Saludos y gracias anticipadas.
Txus
PD.: Según vustra opinión qué debo de corregir ?

[Bitxi2005]

Zamudio, ¿no?.....

[hecnaca]

si nos pones los datros exif podremos ayudar mejor y sacar conclusiones.
PD:para hacer pruebas mejor buscas por el foro como hacerlas(porque yo no tengo ni idea) para asi asegurarte con las tomas...a pulso no creo que sea lo mas correcto.
saludos!

[txus2006]

Zamudio, ¿no?.....
Pues si, has acertado plenamente.
Saludos

[txus2006]

si nos pones los datros exif podremos ayudar mejor y sacar conclusiones.
PD:para hacer pruebas mejor buscas por el foro como hacerlas(porque yo no tengo ni idea) para asi asegurarte con las tomas...a pulso no creo que sea lo mas correcto.
saludos!
Los tienes puestos, no los ves?
Pincha con el contextual y los verás.
Ah! En firefox existe un plugin para ver los exif de cualquier foto.
Saludos

[txus2006]

Los tienes puestos, no los ves?
Pincha con el contextual y los verás.
Ah! En firefox existe un plugin para ver los exif de cualquier foto.
Saludos

# Exposure Time (1 / Shutter Speed) = 1/250 second = 0.004 second
# Lens F-Number/F-Stop = 8/1 = F8
# ISO Speed Ratings = 100
# Exif Version = 0220;;
# Original Date/Time = 2009:02:25 12:49:37
# Digitization Date/Time = 2009:02:25 12:49:37
# Components Configuration = 0x01,0x02,0x03,0x00,0x00,0x00 / YCbCr
# Shutter Speed Value (APEX) = 524288/65536
Shutter Speed (Exposure Time) = 1/256 second
# Aperture Value (APEX) = 393216/65536
Aperture = F8
# Exposure Bias (EV) = 0/1 = 0
# Flash = Flash did not fire, compulsory flash mode
# Focal Length = 50/1 mm = 50 mm
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[josemar]

No sé. Yo tengo ese objetivo aunque montado en una 40D y creo que te debería haber dado más calidad de la que se aprecia en la imagen. No sé cómo enfocaste, si en manual o en AF, cúal punto de enfoque usaste, si quizás debieras haber subido el iso (a 200) para poder tirar con un valor de apertura menor de f8 (entre f11 y f16) sin problemas de trepidación (aunque incluso con los valores puestos te debería haber salido mejor), si tiraste en raw o jpeg. Lo cierto es que ese objetivo da más de lo que muestra la foto.

A lo mejor desde que pusiste el post ya le has sacado provecho al mismo. Saludos.

[txus2006]

No sé. Yo tengo ese objetivo aunque montado en una 40D y creo que te debería haber dado más calidad de la que se aprecia en la imagen. No sé cómo enfocaste, si en manual o en AF, cúal punto de enfoque usaste, si quizás debieras haber subido el iso (a 200) para poder tirar con un valor de apertura menor de f8 (entre f11 y f16) sin problemas de trepidación (aunque incluso con los valores puestos te debería haber salido mejor), si tiraste en raw o jpeg. Lo cierto es que ese objetivo da más de lo que muestra la foto.

A lo mejor desde que pusiste el post ya le has sacado provecho al mismo. Saludos.

En primer lugar muchas gracias por tu opinión.
Leí por ahí que en f/8 es donde este objetivo daba su máx. calidad.
Está en RAW. sin retoque alguno para evitar confusiones.
Saludos

[josemar]

Pero esta foto es tipo "paisaje" (urbano, en este caso) y creo que debiera tener una menor apertura. A algún objeto más cercano y concreto si hubiese notado más ese f8. No sé si me equivoco o no con lo que digo.

Y fuera del contexto de esta foto. ¿Has hecho más pruebas?.

[enricvision]

Y en las siguientes pruebas asegurate que enfocas SOLO con el punto de enfoque central. Una vez terminadas las mismas, puedes usar el que quieras.

Salu2

[juanma63]

Según la siguiente review de photozone el tamron 17-50 donde tiene mejor definición es a f5,6 y sino mirad en la web
Tamron AF 17-50mm f/2.8 SP XR Di II LD Aspherical [IF] (Canon) - Test Report / Review (http://www.photozone.de/canon-eos/289-tamron-af-17-50mm-f28-sp-xr-di-ii-ld-aspherical-if-canon-test-report--review?start=1)

[Juanfer]

Deberías tener mayor definición, inclusive mayor saturación y contraste, un punto fuerte de este objetivo.
Abrazo. Juan