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Posts for: selmslie
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Apr 30, 2024 14:19:35   #
Bridges wrote:
It may be just my imagining, but to me the Tiff image looks a little blacker on the one end and the transition from black to white is a little smoother.

The TIFF came first and the JPEG was made from it.

Unless you have a 10-bit display, both should look the same on the screen but different in a print.
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Apr 30, 2024 13:34:38   #
SuperflyTNT wrote:
Maybe, with a RIP, but Epson won’t confirm that it actually does 16 bit.

If it couldn’t handle 16-bit TIFF it wouldn’t let you print it.
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Apr 30, 2024 12:56:24   #
SuperflyTNT wrote:
Your print server also plays a part. If you’re using windows the drivers only support 8 bits. Mac can do 16, I dunno about Linux.

Windows can do 16 also (Epson).
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Apr 30, 2024 12:35:57   #
Ysarex wrote:
Ah yes, degenerating to juvenile insults; always your answer when you're proven wrong again.

It is just an objective appraisal of those images.

If you can’t handle critique, post something better.
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Apr 30, 2024 12:32:40   #
bwana wrote:
I don't see any banding in either Download example.

bwa

I can see it on a 2k and 4k monitor because both are calibrated 8-bit displays when I look closely.
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Apr 30, 2024 12:28:21   #
CHG_CANON wrote:
For breakfast I had the final three home-made sourdough pancakes, with real Canadian Maple syrup and Irish butter. These details too have nothing to do with anything related to 16-bit TIFF image files...

A 24MP NEF from a D7100 sits on disk as 23.3MB file. I yanked it into LR6 and exported as a JPEG at 100% quality, giving a file as 20MB. Then, exporting as a 16-bit TIFF (no compression), I get a file at 137MB. 'Time' has nothing to do with any of these three byte-size observations of a 24 megapixel digital file. Or, more exactly, time is as nonsensical as the breakfast menu options today ....
For breakfast I had the final three home-made sour... (show quote)

It’s not as likely to be an issue with a color image.

I can export a B&W 24MP image at 137mb RGB and convert it from 48-bit to 16-bit TIFF at 46mb.
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Apr 30, 2024 11:46:50   #
CHG_CANON wrote:
Alas, mixing pixel resolution and uncompressed data in a 16-bit TIFF format is unproductive (i.e., even less useful to a technical discussion ....)

That makes no sense. The export from C1 does it very quickly.
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Apr 30, 2024 11:41:22   #
CHG_CANON wrote:
Useless? yep.

1, Where are you going to find someone online to receive and print your ENORMOUS 16-bit TIFF?

2, Didn't you shoot in RAW and edit in that native RAW format with a qualified digital editor? The sRGB export to JPEG properly mapped all those colors with no color banding; hence, no issue.

The colors aren't the issue. It's the banding, even when developed from a raw file. It's more noticeable when the image has no colors at all.

As I said in the first post, we very rarely need to export to 16-bit TIFF but it's an option if you are making your own prints and can print them large.

I don't necessarily need an enormous TIFF. If I downsize it to 6000x4000 the file is big but not excessive and 24MP is more than enough to make an image at any size.

Another option is to convert the B&W 48-bit TIFF to a 16-bit TIFF. That reduces the file size to about 1/3 of the original.
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Apr 30, 2024 11:32:10   #
Ysarex wrote:
It's not a blurred image. The subject is sharp and the DOF is satisfactory for me. It's my photo.

And what matters in this thread that makes you wrong is that understanding how DOF functions helped me get the photo I expected.

Your expectations are low, even by UHH standards.

Here are some examples from the gallery, taken with an iPhone. https://www.uglyhedgehog.com/t-806030-1.html

They are better than yours. You need to up your game.
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Apr 30, 2024 10:57:45   #
Ysarex wrote:
A larger print would be viewed at an appropriate distance and the trees in the back don't need to be tack sharp. I don't need them to be tack sharp. You can also argue that having the background a touch soft is an enhancement that helps keep attention on the critical subject. It's my photo.

A larger print viewed at an appropriate distance would not make a blurred image look better.

Since this is a discussion of DOF, maybe you should not have offered them as examples on this thread.

Neither image appears to show that you really know how DOF works.

You might talk the talk, but you can't walk the walk.
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Apr 30, 2024 08:39:11   #
Ysarex wrote:
I use single point auto focus and can move the focus point anywhere I want easily. Understanding how DOF distributes around the focus point I moved the focus point for the lake photo to a much closer than intermediate distance, made a deliberate choice for the f/stop, and I got the result I expected --

At f/7.1 and 30mm, your hyperfocal distance was about 6.5 meters. Your selected point of focus was pretty close to that. That could be easily considered an intermediate focal distance since the hyperfocal distance puts the near limit at about 4 meters.

The pitfall of relying on hyperfocal distance (or close to it) is that, as you move away from the plane of focus, the image gets more out of focus in each direction until it becomes clearly out of focus to the viewer. The consequences are worse beyond the plane of focus than they are nearer to the camera because stuff like the reeds are much larger in the foreground than in the background where the reeds and trees need to be sharper.

If you look at the trees and the reeds in the background, they are not sharp. The look OK in the thumbnail but the image would not hold up as a larger print.

If you had selected a focus point further out, you could have mitigated some of these problems. And f/8 would have worked better.

Your smartphone would not have made the same mistake. It's smarter than you.

And there is something wrong with the second image. Nice colors and composition but just about everything looks blurred.
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Apr 29, 2024 22:44:48   #
Ysarex wrote:
Well then please tell us how did I focus those images. ...

You focused just like every else does. You aimed the camera's focus at something at an intermediate distance and pressed the shutter.

You could not judge the DOF as you took the image any more than anyone could looking at the result.
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Apr 29, 2024 21:01:17   #
Ysarex wrote:
Meaningless contrived trolling, as if the only thing I did with my photos was post them here. 2048 pixels is plenty to allow someone who can see to recognize thoughtful DOF usage in that image.

BS alarm is going off.

Anyone can see how you focused those images. DOF had nothing to do with it.
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Apr 29, 2024 19:26:43   #
Ysarex wrote:
Understanding that DOF distributes unequally around the focus point was useful and I applied that knowledge.

I doubt it since you didn’t post the full size image.
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Apr 29, 2024 18:12:07   #
Ysarex wrote:
I understand that it's fine for you to prefer a keep-it-simple-stupid approach. Make it clear that you speak for yourself and I'm out of here.

You should have left out the insult, "keep-it-simple" is not stupid. Just as well you are out of here.

Here is a nice big image:

I didn't worry about DOF.
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