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0 pointsappletrotter3y ago0 comments

> Have you ever used a 35mm film camera?

Yep.

> The amount of light that’s let in depends entirely on the aperture diameter, not the size of the sensor.

That’s wrong. The size of the sensor, the aperture size (and of course the distance between the two) are all factors that together on this.

Saying the sensor size is the reason is also wrong, but the size of the sensor is a factor in the equation - and the sensor being so small forces manufacturers to go with wide open apertures. It’s not ideal for every shot.

> Even with a wide aperture lens and 400 ISO film

If I was shooting at night, why would I use 400 iso?

> You can drive yourself insane trying to get a 4x5 negative that doesn't have any uneven development or scratches.

Sounds like a good time for a hobbyist.

> Thus, it annoys me when people compare these incredible devices unfavourably with "real cameras". It's pure gatekeeping.

I’m not the one gatekeeping. Cell phone cameras are real cameras. They’re just different.

You say it’s good for general shooting, I’m talking about professional and hobbyist use.

I will say though, it’s just an interesting fact AFAICT - digital cameras are still behind - or are only just hitting parity - in terms of dynamic range.

https://petapixel.com/2019/05/02/film-vs-digital-this-is-how...

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foldr3y ago

>That’s wrong. The size of the sensor, the aperture size (and of course the distance between the two) are all factors that together on this.

For a given angle of view, the amount of light incident on the sensor depends solely on the diameter of the aperture (the absolute diameter, not the f number). You can see this visually in the comment I made here: https://news.ycombinator.com/item?id=33426540

If you really want to think of it in terms of a combination of sensor size and f number, you can do so. But it's easier just to look at the size of the hole the light is going through – which not surprisingly, determines how much light ends up being collected, once you fix the angle of view.

>If I was shooting at night, why would I use 400 iso?

Because films with higher ISOs are unacceptably grainy for most uses.

appletrotterOP3y ago

I agree on your first point, it is the amount of light coming in through the aperture. A wide open aperture lets more light in.

The point is just that they have to balance DOF and brightness in their designs. It’s a multi-variable equation, and sensor size is one of the factors that constrains the options you have available all things considered.

Like you said

> once you fix the angle of view.

And of course they’re limited to relatively small apertures anyway.

> Because films with higher ISOs are unacceptably grainy for most uses.

Not in my experience! This is just nitpicking now.

We can keep getting more and more technical, but I think you understand how it works.

You’ve made your point. You don’t like gatekeeping. I’m not gatekeeping.

foldr3y ago

Sorry, there’s something about discussions of the relative merits of camera systems that seems to get everyone very hot under the collar. Indeed, I think we have both made our points based on our own experience.

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foldr3y ago

>That’s wrong. The size of the sensor, the aperture size (and of course the distance between the two) are all factors that together on this.

>If I was shooting at night, why would I use 400 iso?

Because films with higher ISOs are unacceptably grainy for most uses.

appletrotterOP3y ago

I agree on your first point, it is the amount of light coming in through the aperture. A wide open aperture lets more light in.

Like you said

> once you fix the angle of view.

And of course they’re limited to relatively small apertures anyway.

> Because films with higher ISOs are unacceptably grainy for most uses.

Not in my experience! This is just nitpicking now.

We can keep getting more and more technical, but I think you understand how it works.

You’ve made your point. You don’t like gatekeeping. I’m not gatekeeping.

foldr3y ago

j / k navigate · click thread line to collapse