DPReview.com is closing April 10th - Find out more

90mm Test Shots

Started Oct 28, 2017 | Discussions thread
rwbaron Forum Pro • Posts: 14,345
Re: 90mm Test Shots

mahdirafiey wrote:

rwbaron wrote:

Yes that's it. It's also visible in areas of the upper left quadrant.

It's quite clear on my MacBook Retina display even without magnification or manipulation.

rlx wrote:

Is that what you are seeing. I can't see it myself but the pattern becomes apparent after some image filtering and it shows up in the FFT.

I would be surprised if the pattern was created by the lens.

Rawtherapee processing.

Part of the picture without the shirt and its FFT (ImageJ). The shirt itself has a pattern so I had to remove the shirt from the picture.

I think it is because of the background itself and not the lens. I have this lens and never experienced this. see sample below.

Yes and my thinking is it's the way this site handles the files. There have been discussions about this in the Canon forums several years ago where people noticed artifacts in the photos they uploaded to this site that were not in their original.

-- hide signature --
 rwbaron's gear list:rwbaron's gear list
Fujifilm X-T2 Fujifilm X-T20 Fujifilm XF 18-55mm F2.8-4 R LM OIS Fujifilm XF 55-200mm F3.5-4.8 R LM OIS Fujifilm XF 23mm F1.4 R +8 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow