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85MM G Master Fails


magicklens
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FYI

 

Sent my new G Master lens in for warranty repairs last Friday.  Yes it arrived new with the grinding sound.  I purchased the lens from B&H 60 days ago, shot a few pic's around the house on my A7RII and put the lens away.  I had a shoot on Saturday and decided to use the 85mm G master.  The lens body beeped when I mounted the lens and turned on the camera.  It would slam hard against stops without focusing at all, more beeps.  I have two A7II bodies in addition to the ARII.  Same behaviour. Software current on all bodies.

 

B&H wouldn't consider an exchange or return (don't blame them, they're just sticking to policy) so I went through the return process.  Cost me $65 to send it in UPS ground and insured. Sony won't pay postage. I was told that it would be at least 10 days after they received it before it would be ready to return.  So I could be without the lens for almost a month. I'll report on this once my (new) repaired lens is returned.  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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  • 4 weeks later...

Took a little less than 10 days round trip. Precision Camera did the work and by all accounts did a good job.  Main circuit and CPU repair was noted on the repair ticket.  I have noticed that the lens noise though still there is reduced on the repaired lens.  Had a mini session with it early this week and the lens appears to be functioning OK.  Can't say the experience does much to inspire confidence in my Sony gear but I did the only thing I could do following the purchase decision.  I'll live with it for now and see how it holds up over time.

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    • For modern lens design, this is totally normal behaviour. To minimize size and weight of the lens and to improve many optical aspects, compromises are made in areas where the image can be corrected digitally. Distortion is one of these compromises: heavy barrel distortion is very common at the wide end of the focal range, up to a point where the corners of the sensor are not even covered by the projected image (i.e. rendered black). This is fixed by applying the proper distortion correction in your RAW editor: the black corners are stretched to a point beyond the image crop. Any leftover vignetting is then also digitally corrected. All this is done in-camera when processing a JPEG image, which is why it only shows up in RAW files. 2. Yes, these black corners are a property of the lens, not of the camera.
    • Hi Guys, I was shooting some flowers today. when I checked the images back home, I found out that all images in RAW format with 18mm focal length had heavy image distortion and were black-cornered. I wonder if this is the same case for you guys? If so,  is this issue solvable? if so, how did you guys solve it? 2. can I still use any focal length that's larger than 18mm( ex. 16mm) on this camera body?     Note: Len is Sony's 18-135mm OSS only images that had a focal length of 18mm had this problem only in RAW format. the same image in Jpeg did not get affected   Here are some sample images for your reference: https://drive.google.com/file/d/10-I9wUBPo9KT-aaW7Fhtx2v9WCnJ3vbT/view?usp=sharing https://drive.google.com/file/d/10-I9wUBPo9KT-aaW7Fhtx2v9WCnJ3vbT/view?usp=sharing
    • Check the contents of this forum, that subject has been covered many times.  If you are looking for adapters with best AF functionality, Sony's own offerings is probably your best choice.
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