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APS-C / Full Sensor question

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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2019 at 17:43
Originally posted by addy landzaat addy landzaat wrote:


Full frame sensors are about a stop better then APS-C (as is Aavo's experience).

This needs qualification to be true. Full-frame captures 2.34x more light than APS-C at the same exposure settings. Exposure settings are abstract and can be changed. In fact they have to be changed if you want the images captured to look a certain way. When you account for those necessary changes the stop better disappears and often reverses.

In my use the A7II seems to perform a bit worse for capturing most images than my A6000. The abstract 1 stop exposure advantage doesn't apply to how real optical images are captured in actual use.

Edited by QuietOC - 09 April 2019 at 18:08
Sony A7II A77II LA-EA3 LA-EA4 MC-11
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8
 



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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 09 April 2019 at 20:29
Originally posted by QuietOC QuietOC wrote:

In my use the A7II seems to perform a bit worse for capturing most images than my A6000. The abstract 1 stop exposure advantage doesn't apply to how real optical images are captured in actual use.
Well, I was talking about sensors, not about camera/lens combinations. And I wonder in what sense your A7II performs worse then your A6000. If you look at the measurements by DxoMark (I know) you'll notice an advantage of about a stop for the A7II until 12800iso where they are surprisingly close.

Also, you do not post pictures here, so, I do not know what kind of pictures you take. Maybe it is more depending on your subjects then the cameras.
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Post Options Post Options   Quote jkkyler Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2019 at 03:54
THanks for all the responses. Essentially I was looking at getting some cheap aps-c glass and using it in crop mode on my FF A7III for astro shots but only if I wasn't giving up speed/low light performance. a ~10 mp picture would be fine for most of my prints or needs but I didn't want to have to bump the ISO a few stops compared to what I would with a FF lens of the same F-stop value. I am willing to sacrifice some MP resolution but not at the expense of noise, dynamic range, or speed.
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Post Options Post Options   Quote Aavo Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2019 at 07:53
Originally posted by jkkyler jkkyler wrote:

THanks for all the responses. Essentially I was looking at getting some cheap aps-c glass and using it in crop mode on my FF A7III for astro shots but only if I wasn't giving up speed/low light performance. a ~10 mp picture would be fine for most of my prints or needs but I didn't want to have to bump the ISO a few stops compared to what I would with a FF lens of the same F-stop value. I am willing to sacrifice some MP resolution but not at the expense of noise, dynamic range, or speed.

Agree with you - this is one of mean reasons for FF users, if low light shooting is remarkable part of one's photography. I just like to add, that despite rise of nicely usable high ISO value, the lighting around us remains the same, if we don't go into deeper darkness with possibilities offered by better and better high ISO perfomance. So, there is some cognitive level of low light limit, surely individual for each of us.
For me will be very nise to have very spartal small and light rangefinder style aps-c body with about 10MP novadays sensor, because I just can't imagine I need prints bigger than normally croped pics from about 10MP shot can give to me. As this body not exists, I had many years some timeless desire to go with 24MP FF in-body stabilised body and mostly aps-c lenses. a6500 calmed me down again because of in-body stabilisation and A7III stressed me again.
So, I understand jour feeling very well
a6500 & some nice e-mount lenses. Be fond of photography - this is the way to alleviate stress
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