Jump to content

Sony a7 plus Wegat plus Meade etx125: Which Adapter Please?

Omorali

By Omorali,
in Legacy Lenses

 Share

Recommended Posts

Omorali Rookie

Omorali

Posted
Posted

Since de-forking it, I have replaced my Meade etx125's camera and eyepiece plastic back with an aluminum Wegat back.

 

Using that and the Celestron T-adapter SC and an adapter that connects everything to my a7, I had hoped to be able to use the etx125 as a telephoto lens.

 

But I am not able to bring anything to focus because the connecting tube is not the right length to bring images to focus onto the camera's sensor.

 

Does anyone know which connector is the correct one to use please?

 

The standard Meade fare is not likely to be any use since they were designed to attach to the plastic camera holder.

Link to post
Share on other sites
  • 4 months later...
Discordia Contributor

Discordia

Posted
Posted

We are talking about prime focus here right? Not eyepiece projection. I had  my a7s attached to a meade etx-70at for a while. I was using a sony nex T-ring with the meade #64st T-adapter and worked just fine. I think you could have some better luck this way. If not then i quess you need spacers and you should ask more here www. telescopeadapters. com If i remember right the etx125 is about 1900mm which is very powerfull focal length for moon, sun eclipse shots but you have to know that these optics have severe chromatic aberration. But i quess you could post process this problem.Anyway good luck

Link to post
Share on other sites
  • 1 year later...

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...