Sony A7III for beginner

f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise; or ISO 800 f/2.8 and 1/250 to get the same DoF and the same noise; or ISO 200 f/2.8 and 1/250 to get the same DoF, the same noise, and less highlight clipping if I'm shooting raw on a ISO-invariant camera. There are other options, too, depending on the camera and the goal(s).
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list? ;)
 
f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
or ISO 800 f/2.8 and 1/250 to get the same DoF and the same noise;
hmmm... overexposed by three stops then... but if that is what you like in a picture, i won't stop you
or ISO 200 f/2.8 and 1/250 to get the same DoF, the same noise, and less highlight clipping if I'm shooting raw on a ISO-invariant camera.
hmmm.... same f-number of FF results in the same DoF... that is the first time I hear this :)
There are other options, too, depending on the camera and the goal(s).
I know... my point is if the exposure is correct with f2.8, iso200 1/250th on m43... then it is also correct shooting the same settings on APS, FF, medium format, Film, whatever!
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list? ;)
Bob is mostly talking nonsense. Empirical fact on this forum. Can't help that, I am not typing his words. But you are gaining ground on him... fast :)
 
f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
Mind you, you've said "exposure", and nothing about the blur. Please don't move the goal posts.
or ISO 800 f/2.8 and 1/250 to get the same DoF and the same noise;
hmmm... overexposed by three stops then.
It is the same exposure, f/2.8 and 1/250, as you've suggested. Exposure doesn't include ISO speed, even wiki offers a good definition of photographic exposure to that point.

I was expecting that a shooter with practical experience would instantly either suggest a different f-number in the above, or would recognize that focal length or shooting distance may be different (see, you use f2.8, and that masks the meaning, focal length divided by ...) - you haven't stated anything about those parameters. It seems throwing "but you never shoot" to another person was a bit excessive on your part.
There are other options, too, depending on the camera and the goal(s).
I know... my point is if the exposure is correct with f2.8, iso200 1/250th on m43... then it is also correct shooting the same settings on APS, FF, medium format, Film, whatever!
Above, you stated: "i would shoot exactly the same on ff (and every other photographer in the whole world)" - and that's a no. Exposure is not all that matters to a photographer; often other constraints, like DoF, blur, noise come into play (as well as framing, shooting distance, magnification, perspective, ...).

Also, I don't use any f/2.8 lenses for my LF cameras, or f/1.4 lenses for my MF cameras. If I shoot using f/1.4 lens on m4/3, I simply can't shoot, physically can't, at the same f/1.4 on an MF. That makes your "correct" rather theoretical.
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list? ;)
Bob is mostly talking nonsense.
Or you mostly don't understand him.
 
f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
Mind you, you've said "exposure", and nothing about the blur. Please don't move the goal posts.
Read my first purple statement again please. It says 'exposure'!
or ISO 800 f/2.8 and 1/250 to get the same DoF and the same noise;
hmmm... overexposed by three stops then.
It is the same exposure, f/2.8 and 1/250, as you've suggested. Exposure doesn't include ISO speed, even wiki offers a good definition of photographic exposure to that point.

I was expecting that a shooter with practical experience would instantly either suggest a different f-number in the above, or would recognize that focal length or shooting distance may be different (see, you use f2.8, and that masks the meaning, focal length divided by ...) - you haven't stated anything about those parameters. It seems throwing "but you never shoot" to another person was a bit excessive on your part.
Maybe excessive, yes.
There are other options, too, depending on the camera and the goal(s).
I know... my point is if the exposure is correct with f2.8, iso200 1/250th on m43... then it is also correct shooting the same settings on APS, FF, medium format, Film, whatever!
Above, you stated: "i would shoot exactly the same on ff (and every other photographer in the whole world)" - and that's a no.
To get the same exposure! To get the same exposure!
Exposure is not all that matters to a photographer; often other constraints, like DoF, blur, noise come into play (as well as framing, shooting distance, magnification, perspective, ...).
To get the same exposure. All I am saying is that shooting the same settings across formats gives you the same exposure.
Also, I don't use any f/2.8 lenses for my LF cameras, or f/1.4 lenses for my MF cameras. If I shoot using f/1.4 lens on m4/3, I simply can't shoot, physically can't, at the same f/1.4 on an MF. That makes your "correct" rather theoretical.
?
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list? ;)
Bob is mostly talking nonsense.
Or you mostly don't understand him.
Nonsense is often hard to understand.
 
f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
Mind you, you've said "exposure", and nothing about the blur. Please don't move the goal posts.
Read my first purple statement again please. It says 'exposure'!
Well, your statement has now turned blue. Which is unlike the sky in your Amsterdam shot which is rather blown-out.

(but I never noticed the accessible stairs next to the boat named boot, so thanks for sharing, will make an interesting viewpoint)
or ISO 800 f/2.8 and 1/250 to get the same DoF and the same noise;
hmmm... overexposed by three stops then.
It is the same exposure, f/2.8 and 1/250, as you've suggested. Exposure doesn't include ISO speed, even wiki offers a good definition of photographic exposure to that point.

I was expecting that a shooter with practical experience would instantly either suggest a different f-number in the above, or would recognize that focal length or shooting distance may be different (see, you use f2.8, and that masks the meaning, focal length divided by ...) - you haven't stated anything about those parameters. It seems throwing "but you never shoot" to another person was a bit excessive on your part.
Maybe excessive, yes.
There are other options, too, depending on the camera and the goal(s).
I know... my point is if the exposure is correct with f2.8, iso200 1/250th on m43... then it is also correct shooting the same settings on APS, FF, medium format, Film, whatever!
Above, you stated: "i would shoot exactly the same on ff (and every other photographer in the whole world)" - and that's a no.
To get the same exposure! To get the same exposure!
Exposure is not all that matters to a photographer; often other constraints, like DoF, blur, noise come into play (as well as framing, shooting distance, magnification, perspective, ...).
To get the same exposure. All I am saying is that shooting the same settings across formats gives you the same exposure.
Also, I don't use any f/2.8 lenses for my LF cameras, or f/1.4 lenses for my MF cameras. If I shoot using f/1.4 lens on m4/3, I simply can't shoot, physically can't, at the same f/1.4 on an MF. That makes your "correct" rather theoretical.
?
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list? ;)
Bob is mostly talking nonsense.
Or you mostly don't understand him.
Nonsense is often hard to understand.
 
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f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
this is incorrect.
Try it... Oh... Of course not... You don't shoot.
Hmmmm.... a sunrise shot with high dynamic range and a blue hour long exposure with darker areas, artificial lights and the possibility of a blown out sky... yeah... your typical circumstances.
that's a 1 hour exposure? did you mean 1 second?
Rest my case.
Lol. There is a huge dpreview explanation on this with lots of proof. But hey, keep your eyes closed.

Arrogance really gets in the way of becoming a better photographer. If you want to shut your eyes to new information and objective data, then don't read peer reviewed sources of information like forums.
 
f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
this is incorrect.
Try it... Oh... Of course not... You don't shoot.
Hmmmm.... a sunrise shot with high dynamic range and a blue hour long exposure with darker areas, artificial lights and the possibility of a blown out sky... yeah... your typical circumstances.
that's a 1 hour exposure? did you mean 1 second?
Rest my case.
Lol. There is a huge dpreview explanation on this with lots of proof. But hey, keep your eyes closed.

Arrogance really gets in the way of becoming a better photographer. If you want to shut your eyes to new information and objective data, then don't read peer reviewed sources of information like forums.
First, lookup the term 'blue hour'.

Second, are you actually saying that if i shoot on one format with iso x, aperture y and shutterspeed z to get a correct exposure that on another format with those same settings I will get a wrongly exposed image?

"Arrogance really gets in the way of becoming a better photographer. ", my compliments, well said.
 
f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
Mind you, you've said "exposure", and nothing about the blur. Please don't move the goal posts.
Read my first purple statement again please. It says 'exposure'!
Yes, you've said exposure, and I quoted you saying "exposure".

Here is your statement: "if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff to get the same exposure". Point is, you are over-defining exposure associating it with the particular aperture and shutter speed combination, saying "i would shoot exactly the same on ff".

On the other hand, you are also over-defining exposure by mentioning ISO, while ISO is not a part of the exposure - like "Volume" is not a part of original sound recording. ISO setting is applied after the shutter is closed and exposure is finished.

Please consider the definition of photographic exposure.

On a side note, the whole "same exposure" thing across different sensors and different sensor formats is a false goal, a misleading concept when it comes to noise and artifacts, clipping, etc.. It is the result that matters, and quite often the same result (or a better result) can be achieved at a different exposure.

If one wants to get the same result from m4/3 and FF, an example of settings will be 2 shots taken from the same distance, using:

on m4/3:

42.5mm (Panasonic) lens, 1/100 sec, f/1.7 (say, using ISO 200)

on FF:

85mm lens, 1/100 sec, f/3.4 (say, using ISO 800; or the same ISO 200 if shooting raw on an ISO-invariant camera and thus preserving more highlights, or maybe a different ISO setting strategy if using a dual-gain camera).

It is not the same exposure, exposures are 2 stops apart, but the resulting shots are very much the same. If you try it, you will have an empirical evidence it is true.

The parallel question is: if one is OK with DoF at f/2.8 on an FF camera, why not to use it and increase exposure, thus achieving less visible noise in shadows and overall better quality?
bobn2 ... is on my ignore list, I choose not to read this kind nonsense.
Is basic physics also nonsense and on your ignore list? ;)
Bob is mostly talking nonsense.
Or you mostly don't understand him.
Nonsense is often hard to understand.
If it doesn't make sense to you it isn't necessarily make it nonsense.

--
http://www.libraw.org/
 
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f2.8 is f2.8 us f2.8.... if i shoot iso200 f2.8 1/250 on mft... i would shoot exactly the same on ff (and every other photographer in the whole world) to get the same exposure.
this is incorrect.
The first part of that statement is 100% factually incorrect. just because you use similar settings between different formats, is irrelevant.
Try it... Oh... Of course not... You don't shoot.
Hmmmm.... a sunrise shot with high dynamic range and a blue hour long exposure with darker areas, artificial lights and the possibility of a blown out sky... yeah... your typical circumstances.
that's a 1 hour exposure? did you mean 1 second?
Rest my case.
I'm just surprised you put in more than an hour of effort in to that shot... you carried a tripod to get quite a bit of visible noise? But you're unwilling to carry a slightly larger camera that would have made it a much better picture? I'm not a landscape photographer, but i'm surprised one would carry such a small sensor camera, especially if you like taking low light shots.

my below shot took about 20 seconds of effort with a 2015 smart phone camera. It's much easier light conditions, but landscape hdr stuff is not exactly hard on a camera.

 
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A lot of blah about nothing.

If I shoot a photo on 1 system to get a properly exposed image using iso200, f4 and 1/250th, then I will get a properly exposed image using the same settings on any other format.

That is all I am saying. I feel like talking to some climate-change deniers.
 
u put in more than an hour of effort in to that shot... you carried a tripod to get quite a bit of visible noise? But you're unwilling to carry a slightly larger camera that would have made it a much better picture? I'm not a landscape photographer, but i'm surprised one would carry such a small sensor camera, especially if you like taking low light shots.
To big. To heavy. To expensive. Even if I would have been able to buy it, I would not have been able to bring it. I would have been forced to leave stuff at home and this shot might never have been taken. Really hard concept to grasp for a lot of people.

I can easily print this image big, really huge, and it will look awesome... nobody will notice any noise... of course... I am not shooting for people looking at 400% at monitors to judge images...
my below shot took about 20 seconds of effort with a 2015 smart phone camera. It's much easier light conditions, but landscape hdr stuff is not exactly hard on a camera.

https://photos.app.goo.gl/WeMAcGZjDLUJQDdBA
 
A lot of blah about nothing.

If I shoot a photo on 1 system to get a properly exposed image using iso200, f4 and 1/250th, then I will get a properly exposed image using the same settings on any other format.

That is all I am saying.
You are not saying what is "properly exposed image". And whatever it is, the question is not just about exposure. One either wants equivalent images, or one wants to benefit from the advantages the given format provides.
I feel like talking to some climate-change deniers.
They don't need your support.
 
A lot of blah about nothing.

If I shoot a photo on 1 system to get a properly exposed image using iso200, f4 and 1/250th, then I will get a properly exposed image using the same settings on any other format.

That is all I am saying.
You are not saying what is "properly exposed image". And whatever it is, the question is not just about exposure. One either wants equivalent images, or one wants to benefit from the advantages the given format provides.
Omg... in different forums multiple of these insane discussions....

Wel... you got underexposed, overexposed and properly exposed.

And I am talking about exposure. Not about dof, not about equivalence.... just about exposure.
I feel like talking to some climate-change deniers.
They don't need your support.
I will stop now. Given up on the thread in open talk as well.

You can't educate climate change deniers.
 
You can't educate climate change deniers.
Perhaps you should examine your own responses in that context. You seem to be denying that equivalence has any relevance, although it is based on generally accepted mathematics and physics. This is comparable to the reactions of those who deny climate change.

You keep saying that exposure doesn't change with format size at a constant ISO. But no one doubts this. It's inherent in the definitions of f/stop and ISO. But that's not what's being discussed here.
 
A lot of blah about nothing.

If I shoot a photo on 1 system to get a properly exposed image using iso200, f4 and 1/250th, then I will get a properly exposed image using the same settings on any other format.

That is all I am saying.
You are not saying what is "properly exposed image". And whatever it is, the question is not just about exposure. One either wants equivalent images, or one wants to benefit from the advantages the given format provides.
Omg... in different forums multiple of these insane discussions....

Wel... you got underexposed, overexposed and properly exposed.
That's not an answer.

And for a good measure, ISO speed is not a part of exposure. Please get in terms with basic facts.
And I am talking about exposure. Not about dof, not about equivalence.... just about exposure.
Let me remind you that you are not talking "just about exposure":
On FF I would shoot f/5.6 and 1/60 to get the same exposure, the same DoF, and less visible noise;
But then you get blurred movement (1/60 vs 1/250th... I am shooting 1/250 for a reason here)...so this is not an option
I feel like talking to some climate-change deniers.
They don't need your support.
I will stop now.
Yes, please. I doubt you are a climate expert.
 
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A lot of blah about nothing.

If I shoot a photo on 1 system to get a properly exposed image using iso200, f4 and 1/250th, then I will get a properly exposed image using the same settings on any other format.

That is all I am saying. I feel like talking to some climate-change deniers.
properly exposed is just one small factor in image quality.

I was thinking the the exact same thing about climate denier. One of us is brining objective laboratory data to the table, the other is bringing simplistic one off examples.

more data

Lens prices and objective performance comparison, FF is smaller and better in 50mm prime and standard zoom ranges.

https://www.dpreview.com/forums/thread/4331167#forum-post-61811826
 
To big. To heavy. To expensive. Even if I would have been able to buy it, I would not have been able to bring it. I would have been forced to leave stuff at home and this shot might never have been taken. Really hard concept to grasp for a lot of people.
The data I presented in my above post shows that this is false for many use cases.

if your budget is $800 all in, gx85 + 2 kit lenses + 20mm 1.7 or the olympus counterpart is probably your best bet (check that against m50 though (i'm not up to date with m50). if you're buying a $1100 body like your m5mark2 when it was released in 2015, you're in a different pricing category.

I'm format and brand agnostic, cameras get outdated quickly and we're in a huge format war right now. mft made a lot of sense 3 years ago, today not so much. the data seems to lean that FF and apsC are better options depending on budget and whether you want smaller package tradeoff for long zooms. mft currently has hte best cameraman video and long light weight zooms; but for focal lengths under 100mm, they are beat pretty bad.

to reiterate, don't go FF unless you can do the the a7iii $2000
+ 50mm 1.8 $250 + samyang 35 2.8 $300 OR the standard kit zoom $200 ebay. However for that price, nothing will outshoot those focal lengths in a variety of conditions.
 
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To big. To heavy. To expensive. Even if I would have been able to buy it, I would not have been able to bring it. I would have been forced to leave stuff at home and this shot might never have been taken. Really hard concept to grasp for a lot of people.
The data I presented in my above post shows that this is false for many use cases.

if your budget is $800 all in, gx85 + 2 kit lenses + 20mm 1.7 or the olympus counterpart is probably your best bet (check that against m50 though (i'm not up to date with m50). if you're buying a $1100 body like your m5mark2 when it was released in 2015, you're in a different pricing category.

I'm format and brand agnostic, cameras get outdated quickly and we're in a huge format war right now. mft made a lot of sense 3 years ago, today not so much. the data seems to lean that FF and apsC are better options depending on budget and whether you want smaller package tradeoff for long zooms. mft currently has hte best cameraman video and long light weight zooms; but for focal lengths under 100mm, they are beat pretty bad.

to reiterate, don't go FF unless you can do the the a7iii $2000
+ 50mm 1.8 $250 + samyang 35 2.8 $300 OR the standard kit zoom $200 ebay. However for that price, nothing will outshoot those focal lengths in a variety of conditions.
3 full frame mirrorless with features matching my m43 cameras, a 14-28mm f4 zoom, a 24-70mm f2.8, a 70-200mm f2.8 plus a 300mm f2.8 and throw in some fast primes like a 15mm f2 and a 24mm f2.

This setup is at least twice as large, 3 times as heavy and a lot more expensive (3 to 4 times) then the m43 kit I have now.

Don't tell me it is not because that is ridicolous.
 
To big. To heavy. To expensive. Even if I would have been able to buy it, I would not have been able to bring it. I would have been forced to leave stuff at home and this shot might never have been taken. Really hard concept to grasp for a lot of people.
The data I presented in my above post shows that this is false for many use cases.

if your budget is $800 all in, gx85 + 2 kit lenses + 20mm 1.7 or the olympus counterpart is probably your best bet (check that against m50 though (i'm not up to date with m50). if you're buying a $1100 body like your m5mark2 when it was released in 2015, you're in a different pricing category.

I'm format and brand agnostic, cameras get outdated quickly and we're in a huge format war right now. mft made a lot of sense 3 years ago, today not so much. the data seems to lean that FF and apsC are better options depending on budget and whether you want smaller package tradeoff for long zooms. mft currently has hte best cameraman video and long light weight zooms; but for focal lengths under 100mm, they are beat pretty bad.

to reiterate, don't go FF unless you can do the the a7iii $2000
+ 50mm 1.8 $250 + samyang 35 2.8 $300 OR the standard kit zoom $200 ebay. However for that price, nothing will outshoot those focal lengths in a variety of conditions.
3 full frame mirrorless with features matching my m43 cameras, a 14-28mm f4 zoom, a 24-70mm f2.8, a 70-200mm f2.8 plus a 300mm f2.8 and throw in some fast primes like a 15mm f2 and a 24mm f2.

This setup is at least twice as large, 3 times as heavy and a lot more expensive (3 to 4 times) then the m43 kit I have now.

Don't tell me it is not because that is ridicolous.
What's ridiculous is believing that your system is really smaller / lighter / cheaper (http://j.mp/2MjvIEE The FF is cheaper, lighter, smaller but you shouldn't compare parameters this way). You bought into the M43 system because it fits your needs better like that 14-28mm F8 zoom which I admit, when I'm on vacation is nice to have because we don't have F8 zooms for full frame.
 
You guys really know how helping a beginner to choose a camera. OP, i'm sure, must love your fight about equivalence.

Thanks for him.
 

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