av4rice

Do you save all raw photos

All the ones I think I might ever use, yes. I'll delete the ones I won't have a use for.

how do you keep them in order

Separate folders for separate sessions/events and categories.

And what to do with edited photos.

Export them, upload them, delete them locally.

But I keep my catalog files which have the edit information.

It doesn't, at least in principle.

It's built into the aperture f-number because it does, just like entrance pupil diameter does. Thus, it answers OP's real question about why exposure isn't changing even when the entrance pupil diameter changes: because focal length is also changing and ultimately you're arriving at the same f/1.4 f-number.

https://en.wikipedia.org/wiki/F-number

Have I said anything else?

Yes, you said: "This is not the case in this context"

You went way beyond that

I'm just talking about how focal length and entrance pupil diameter both go into the aperture f-number for the purposes of exposure. That's literally how the f-number is mathematically defined.

This has nothing to do with exposure purposes at all, but about how much light is collected.

How much light is collected is not the same as exposure, indeed. But it's a component of exposure that affects the exposure.

And as the context was FF vs APS-C and the size of aperture, what you wrote was hardly helpful.

What I wrote applies in the context of different format sizes. It also applies in the context of the same format size.

This is not the case in this context as it was specifically about APS-C vs FF.

Focal length affects transmission in any context. The f-number is calculated the same regardless of format size, incorporating the focal length. Exposure settings values, including the aperture as expressed as an f-number, work the same for every format size.

For exposure purposes this is of course not relevant

This discussion is about exposure purposes.

Yes, a larger entrance pupil diameter lets through more light than a smaller entrance pupil diameter.

But don't forget that focal length also affects light transmission. A longer focal length gathers light from a smaller area of the scene and therefore less light than a shorter focal length.

That's the whole reason the f-number is set up as a ratio between focal length and entrance pupil diameter, to normalize the effect of focal length so you don't have to account for it separately when figuring exposure. So an f/1.4 aperture should be the same contribution to exposure no matter what the focal length. That's why nobody needs to specify the focal length when communicating exposure settings. A 16mm entrance pupil diameter lets in less light while a 23mm focal length lets in more light, and that equals out to the same as a 25mm entrance pupil diameter letting in more light and paired with a 35mm focal length letting in less light.

And none of the above has anything to do with different format sizes. At 23mm and f/1.4 on full frame format you have the same brightness at 35mm and 1/1.4 on the same full frame format.

it is said that full frame aperture equivalent of 2.8 to aps-c is 4.2.

Only in terms of depth of field, assuming you are matching field of view.

https://www.reddit.com/r/photography/wiki/technical#wiki_should_the_crop_factor_apply_to_aperture.3F

does it mean that shutter speed of aps-c is one stop slower that full frame on the same aperture?

No. Unless maybe you're talking about comparing the same ISO noise level. But if so, it's more complicated than that.

That should all be excellent to start with. Better than what most people start with.

Not on the cover, but looks like the disaster girl meme appears in a book of some kind: https://knowyourmeme.com/photos/131-disaster-girl

As I stated in my post, I am downloading/exporting

You did not state "exporting" in your original post which is exactly why I am trying to clarify what exactly you mean.

The quality is noticeably less than if I were to download the full size 26mp file straight from my camera.

Are you talking about mp? Or mb? The mp abbreviation means megapixels or millions of pixels: the number of tiny colored squares representing the image; a measure of resolution. The mb abbreviation means megabytes or millions of bytes: the amount of data used in the image file.

If the file size (mb) is smaller out of Lightroom, that just means the jpeg compression is more efficient at delivering the same image quality (visually) while using less data. That's a separate issue from a reduction in pixel count (mp).

You say "download" meaning from where to where? Do you mean import? Export? Upload?

What are the pixel resolution/resizing/scaling options?

The jpeg quality is only about compression quality/size, and not resolution. So indeed setting it to any particular amount doesn't do anything about how many pixels you end up with. Also it's just an arbitrary scale, not a percentage. So it's 100 and not 100%. 100 quality is not twice as good as 50 quality.

https://strobist.blogspot.com/2006/03/lighting-101.html

https://www.reddit.com/r/photography/wiki/technical#wiki_should_the_crop_factor_apply_to_lenses_made_for_crop_sensors.3F

people say that 50-55mm is the focal length of the human eye

There isn't really a good answer to that. A camera takes photos of a single moment in a rectangle with hard edges. Your eyes see in a amorphous field with higher acuity in the center that gradually drops off towards the edges, and really when perceiving a scene they move around quickly to move the center around and build up an amorphous larger image over a short period of time. That can't be directly compared with a rectangle.

A 50mm focal length on full frame is the "normal" focal length (about the corner-to-corner diagonal measurement of the rectangle, or diameter of the projected image circle) so it's more or less the agreed-upon middle ground matching your vision. But it isn't exactly what your eyes see, and really no conventional photo is.

Then what i do is i take my camera put it on 35mm and then look at the vizor. What i expect is no zoom at all but the objects look smaller in the vizor (so fov is higher)

Field of view is what you can see from the scene from edge to edge of your frame.

Magnification of the image is a different issue, and also depends on things like the optics of your viewfinder itself.