Old canon DSLRs -Photos never 100% sharp

Old canon DSLRs -Photos never 100% sharp

Điđi says:

Just realized this. So far I was using 1000d, 40d, 5d and 5d III

What I noticed is that photos, especially detailed landscapes are never absolutely sharp when looking at full size.

Even when using very sharp primes well stopped down.

I always convert raws in lightroom, using it’s default sharpening.

Is that because of low pass filter? Did newer cameras solve that problem?
12:25AM, 12 March 2021 PST (permalink)

tourtrophy says:

Lots of variables here. Lens, motion blur, depth of field, focus adjustment, post processing etc. In general the full frame bodies are sharper due to its relatively low pixel density until you get to 50Mpixel+. I would check if your lenses need to get AF microadjustment. From your list, only the 5D III has this feature. All your cameras do have an AA filter. I normally disable noise reduction in Lightroom when shooting low ISO. For sharpening, I used to use the Lightroom default as well and turned up the detail bar to 50. But I have already transitioned to Topaz AI Sharpen. This is much better than Lightroom on sharpening and noise reduction for photos taken at low ISO. For high ISO, I typically use Topaz AI Denoise. I did my RAW conversion in Lightroom and disable sharpening and noise reduction, apply any tonal curve adjustment and lens profile correction before exporting to Topaz in TIFF for the final step of sharpening and noise reduction if needed. I also shoot with the Sony A7Rii which doesn’t have the AA filter. It ‘s noticeably sharper than my 5D IV but not by much. It depends on the glass as well. Some of my Sony primes like the Zeiss 55mm F1.8 and 85mm F1.8 are insanely sharp to point where the pictures look kind of clinical.
Originally posted 21 hours ago. (permalink)
tourtrophy edited this topic 21 hours ago.

Điđi says:

tourtrophy:

Focus is on the spot, no question there.

Let me reformulate the question. I’m shooting with 5dIII and sigma 35mm which is a very sharp lens. I stop it to f8, and manually focus at infinity. The camera is on the tripod, so no motion blur there.

When I pixel peep that photo at full size, why it isn’t 100% sharp even in the center? Why does a detailed object, like a bush for example still look a bit mushy?

That’s what I want to know
Originally posted 21 hours ago. (permalink)
Điđi edited this topic 21 hours ago.

tourtrophy says:

post an example. Haze in the atmosphere also reduces sharpness of objects in the distance. Better choose something closer. Also what resolution is your monitor setting?
20 hours ago (permalink)

Điđi says:

I have no idea how to post a photo here without posting weird test crops into in my photostream.

But believe me, trees some 50m away look really mushy. It’s obvious my sensor is the limiting factor here, not the lens.

Monitor resolution is maximum available 1920 x 1200
20 hours ago (permalink)

Điđi says:

Just googled about it. It seems it’s because of the AA filter. 5dIII has a really strong one. You can’t achieve total sharpness with that camera.
19 hours ago (permalink)

Roger Blackwell says:

Most are sharper than my eyesight. Large and medium format used to be the thing for landscape photography as time was not an issue. My photos look fine poster size on the wall – that’s a good enough criterion for me.
18 hours ago (permalink)

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