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Sony Dust

raptor

By raptor,
in Sony Alpha Full Frame Lenses

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raptor

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Reply to XKAES

Hi and thank you for replying, I want to keep the lens.

I noticed the spot about a week ago, but I reckon it could have been there up to about a month ago.

I don't often tip the lens over to look at it because it's always been spotless, so I haven't noticed any change in size.

Just wondering, could a solution be to use a magnifying glass under the sun and neutralise/burn the offender

assuming it is a growth, or is that an outrageous idea?

I've managed to get a decent shot of the culprit.

Please advise.

Ps I couldn't see how to add the image so I started a new topic.

 

 

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    • Cameratose
      A6700 LOG iso et FW

      By Cameratose · Posted

      I don't think any camera guide mentions it, most manufacturers remain mute. It is discussed regularly and typically pointed out during new camera reviews. If Sony were trying to keep it a secret, they wouldn't let their shills say anything. There's no chance of keeping anything like this quiet these days, someone is going to spill the beans. I suspect they, like other manufacturers, don't discuss it in print for some technical reason. I have discussed it with Sony reps at local camera events on several occasions, it's no secret. In fact, they like to tell you about the advantages in practical application.  One thing I noticed in the chart above. The DR chart shows a smaller gain at ISO 400 than the read noise chart. This one is more accurate for noise, and you can see that ISO 400 is actually similar to ISO 126. That's a huge advantage. If you check this chart for your A7 RV you'll see that ISO 320 gets you down to between 126 and 159, seems plenty usable to me. 

      Welcome, dear visitor! As registered member you'd see an image here…

      Simply register for free here – We are always happy to welcome new members!

      And a different look. The shadow improvement charts show where the shadows are improved for DR, and how much. In the A7 IV there's about a 2-1/2 stop improvement at ISO 400, and then no additional improvement at all until you get to ISO 56K, where Sony applies in-camera NR. According to the primer on this chart, there is no degradation of noise along these flat lines, like from 400 to 51K. Not sure I can agree with that, but I can certainly recover image into ISO 50K in testing and shoot ISO 16-20K successfully.         
    • Richard A
      A6700 LOG iso et FW

      By Richard A · Posted

      It is 320 for stills on my A7R5 so it’s 5/3 stops. I have used it on occasions but it’s a bit low to be any huge deal. It is much more use in video where it is 2500. Have a search for any of those terms you mentioned above in any current Sony camera online guide & I doubt you will find anything. I was at an event yesterday where there were two Sony reps & they wouldn’t discuss it even though one of the presenters mentioned it when talking about his A7S3.
    • Richard A
      How I solved a6700 black screen/flashing red light problem

      By Richard A · Posted

      Yes, I would always wait a week before installing just to see if anyone has problems. This is good advice for any software updates to be honest.

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