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Confusion Buying Video Lens for Sony a7iii

fundoootv

By fundoootv,
in Sony Alpha Video Discussion

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fundoootv Newbie

fundoootv

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Hi Good day.
Sorry for a long post... I am messed up with too much info online, so seeking help from forum members...

I have bought Sony a7iii body, but totally confused with a video lens to choose (at present due to budget has to go for only 1 lens - any lens <$1000, better if less best)

Purpose of Usage is making Self Content (not for client): 

  • 50% Videos Shoot (Youtube Videos & Short Indie Films but good cinematic quality) 
  • 30% Vlogging Videos (Still with tripod in a room not travel handheld, buying external monitor to lookup)
  • 20% Still Photoshoot (For Thumbnails & Social Media Graphics)

#1 Most pref. i might need autofocus lens so non professional helper can use it to make my videos, if lets say i am anchoring/acting in video.
#2 Might use with DJI gimble in future, so not too long / heavy lens
#3 Confused with 50 mm vs 35 mm (as most videos will be indoor/rooms, so i think 35 better ?) any disadvantage of 35 over 50 ??? for full frame body
#4 With sony a7iii eye / face tracing autofocus, do we still opt for fixed cinelenses / prime still lenses ? Is focus breathing and light change a big issue in making videos ?
#5 What to choose Samyang cine 1.5  vs Sigma Art vs Sony G vs Other options ? Keeping in mind <$1000 range

A detailed suggestion will be wonderful and life saving...

God Bless...
Sushant

PS: Have recently used a7s2 with Samyang Cine lens 1.5 - the output with proper led lights was decent / good, not out of the world... and sometime face out of focus
       (its a manual lens, too much time consuming retakes, espc if its time to time movement based / kids game / walking type)
       you know many time actors face/body move forward and backward while talking.... bokeh was okaish, as in rooms you really dont have much distance behind...

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    • 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.  

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