Canon Community

johnrmoyer · 03-30-2025

EOS R5 IBIS and animal eye tracking strangeness. The beak of the woodpecker was moving, but instead of a blur, there is a double exposure. Downy Woodpecker (Dryobates pubescens) in Norman, Oklahoma, United States on March 26, 2025 ; EF100-400mm f/...

johnrmoyer · 03-05-2025

Northern Cardinal (Cardinalis cardinalis) in Norman, Oklahoma, United States on January 27, 2025 https://www.rsok.com/~jrm/2025Jan31_birds_and_cats/2025jan27_cardinal_IMG_2719c.html Camera Model NameCanon EOS R5Lens ModelEF100-400mm f/4.5-5.6L IS II...

johnrmoyer · 02-27-2025

I often see comments that one should just crop instead of using a 2x extender. As an experiment, I stacked 2 extenders. It was cloudy, so there is high ISO noise. Today, I was able to get macPorts to successfully build gmic-gimp, so I used gimp to fu...

johnrmoyer · 02-21-2025

Sometimes I see questions about whether DPP software can upscale an image. The answer is yes that if one checks the resize box in the save dialog, then DPP is willing to upscale up to 300%. As a general rule, I think it is unwise to upscale more than...

johnrmoyer · 01-31-2025

White-throated Sparrow (Zonotrichia albicollis) in Norman, Oklahoma, United States on January 27, 2025 Camera is EOS R5 Software is Canon DPP, exiftool, https://github.com/google/jpegli , and graphicsmagick Camera Model NameCanon EOS R5Lens ModelEF10...

johnrmoyer · 04-11-2025

On my 2019 iMac with 96GB RAM and fusion hard drive and i5 9600K CPU (6 cores), sometimes DPP uses 400% CPU if I start a save of 16bit TIFF and 2 separately scaled JPG at about the same time. The DPP batch process uses more than 300% CPU if in the fo...

johnrmoyer · 04-10-2025

I often use EF100-400mm f/4.5-5.6L IS II USM +2x III with EOS R5 and it seems to me to work very well. The EF 2x III doubles the magnification while losing contrast and increasing small aperture diffraction blur. If the ISO is low enough, (difficul...

johnrmoyer · 04-08-2025

https://canon.jp/support/repair/period. e.g. Digital SLR camera * Products that are not on the list cannot be repaired. Please refer to " Products for which the repair support period has expired ". EOS Kiss Series EOS Kiss X...

johnrmoyer · 04-06-2025

I hope some of this might be helpful. Others mentioned "exposure triangle". An explanation is at https://www.cambridgeincolour.com/tutorials/camera-exposure.htm I am pasting a table from that tutorial here: I have that same lens and have used it a ...

johnrmoyer · 04-03-2025

As Peter said, changing the distance to subject will change moiré. But if fixing a photo that has already been made, I hope some of this might help: If using a Canon lens and saving a raw file, it might be worth trying Canon DPP software "digital le...

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User Activity

EOS R5 IBIS and tracking strangeness

Northern Cardinal (Cardinalis cardinalis) on January 27, 2025

Using DPP and stacked telephoto extenders

Using DPP to upscale image

White-throated Sparrow

Re: DPP really needs a major rewrite

Re: EOS R5 Mark II EF 100-400mm f/4.5-5.6L IS II USM Lens Canon Extender EF 2X III

Re: End of Service Information

Re: EOS Rebel T6 -The difference between M and AV modes?

Re: Moiré pattern with EOS R6 Mark II.