R5 and RF 100-500 Noise

[PietPienaar]

Hi Everyone. I use a R5 with a RF 100-500 lens. Great gear. I am experiencing a serious noise build up starting from ISO 640 onwards. To keep the noise levels down I shoot at slower shutter speeds but sacrifice quality in the process. I do not do any in body cropping anymore. Today I did a test shoot in moderate light conditions with Shutter speed at 1000ths of a second with Auto ISO at 1000 as well. The results were populated with noise and not useable. Even the latest version of DeNoise AI struggled. Anyone with the same or similar problem?

 

[Kwazy]

Hello and welcome.
Please post a sample (cropped out portion of your image at full resolution).

 

[PietPienaar]

Thanks for the speedy response. I tried cropping in Lightroom and exporting as DNG but cannot upload as the file size is too large. could you help with instructions?

 

[Kwazy]

Try .JPG

 

[PietPienaar]

Thanks for the help. Both were at ISO 1600 at about 200/2500ths of a sec. Both poor images but it is the noise which is an issue. Can it perhaps be IBIT competing with Lens stabilisation?

 

[Kwazy]

I think your images may have gotten downsized. If you upload a very large image, this site makes them smaller - which is why I specified that you should crop out a portion of your image. Crop a 1000x1000 pixel noisy region and post that please. I don't see any noise in the images you've provided, at least nothing Topaz couldn't fix.

 

[PietPienaar]

Thanks a lot. I had already deleted my images so I used some older ones of a few weeks ago. Tomorrow I will do a controlled shoot at 1000ths of a second with Auto ISO. It looks like it could be a cloudy day tomorrow so medium light conditions shoul prevail. Your assistance is really appreciated.

 

[Kwazy]

Alright.
Higher ISO does cause quite a bit of noise though. Did your results suddenly change to give cause for alarm?

 

[PietPienaar]

It has been like this since I got the R5. I do know that higher ISO causes noise but it should not be so at 640 to 800. In many cases my backgrounds tend to be cluttered or my subjects too far away or too small so I may be cropping excessively. I do wildlife so often I cannot choose the position of my subject. Tomorrow I will go to a small reserve NEAR ME with Lion, Wild Dog and Cheetah so I will need to shoot at 1000 sec. with Auto ISO so if cloudy the ISO will be above 800. I will see if I can upload some images. All three have fluffy coats so the test should be good.

 

[PietPienaar]

Larger animals seem to be ok but smaller ones and birds always seem to be noisy.