Jump to content

Af Sony A7 iv

Patlicool46
 Share

Recommended Posts

Patlicool46 Newbie

Patlicool46

Posted
Posted

Bonjour 

Venant d'un d700 j ai un peu de mal a maîtriser l af de l a7iv et les résultats sont inégaux voir décevant. Un comble avec cet af +un sigma 50 1.4 dgdn !

Je fais des photos de mes enfants essentiellement. Et ils sont vifs!

J utilise la map sur l oeil. Le collimateur est collé a l oeil donc je l attend a de bon résultats mais régulièrement je manque ma cible et l oeil n est pas net. 

Je suis souvent a f1.4 f2 mais bon normalement même a ces ouvertures ont a de très bons résultats. 

Je ne pige pas où est le problème 
J ai l anti vibration d activé, je fais bien sûr attention a être a des vitesses relativement élevée suivant la vitesse de déplacement de mes sujets de 1/250 a 1/2000 au besoin 

J utilise de le bouton afin pour activer l af a l ancienne...bon je pense pas que ce sois ça le problème 

Est ce que je dois utiliser le suivi ou pas ?

Voyez vous ou je peche ? Ou peut être dites moi quelles sont vos façon efficace d avoir le point

Merci par avance 
PS il y a cette histoire de fonction a désactivé si ont veux un bon bokeh mais il faut je crois la laisse activée pour avoir un af efficient car le problème concerne les hautes vitesses

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Posts

    • Pieter
      Blurry images on Sony 70-350

      By Pieter · Posted

      I've been using this lens extensively without any sharpness issues. At long focal lengths, you'll have to factor in the need for a faster shutter speed (< 1/500-ish at 350mm) and other factors like atmospheric distortion, fog/dust haze, etc. All these factors contribute to a deterioration of image quality at longer focal lengths.
    • Cameratose
      Blurry images on Sony 70-350

      By Cameratose · Posted

      That's supposed to be a pretty good APS-C lens. Can you try it on a different camera just for the heck of it? Friend? Camera shop? The lens is noted for sharpness, so if you're having as much trouble as you say, you may want to look into a replacement or repair. 
    • broz_tito
      Blurry images on Sony 70-350

      By broz_tito · Posted

      Hi everyone, I’m reaching out to the community because I’m facing a persistent image quality issue with my Sony 70–350mm f/4.5–6.3 G OSS lens, and I’d like to know if this is normal behavior or if my copy is defective. Problem description: I’ve extensively compared the 70–350mm G OSS with my Sony 18–135mm f/3.5–5.6 OSS, using a Sony A6700, under controlled conditions: • Identical lighting and background • Same subject and position (LEGO figure, consistent framing) • Tripod or steady support • Manual focus or AF with center point • Same shutter speed (e.g., 1/200s), similar ISO (ISO 4000–6400), RAW + JPEG • OIS turned on (and also tested with OIS off) My observations: • At 135mm, the 70–350mm G OSS delivers softer, flatter images than the 18–135mm, even when stopped down. • At 350mm, the sharpness drops significantly – the center is soft, and textures (like LEGO tiles or fabric) appear blurred or smudged. • Contrast and micro-detail are noticeably inferior across all focal lengths. • The 18–135mm at 135mm (even cropped) retains better edge sharpness and detail definition. • Both JPEG and RAW files confirm the issue – this is not just JPEG processing or noise reduction. Question to the community: • Have others experienced similar softness with the 70–350mm? • Is it possible I have a decentered or optically misaligned copy? • Is there a known issue with OSS introducing softness at long focal lengths? I wanted to love this lens due to the range and portability, but currently it’s unusable for anything where image quality matters. I’m considering returning or sending it for service. Thanks in advance for any feedback or comparison results you can share.  

  • Topics

×
×
  • Create New...