Go Back   MacRumors Forums > iPhone, iPod and iPad > iPhone

Reply
 
Thread Tools Search this Thread Display Modes
Old Dec 29, 2012, 04:38 AM   #1
BluePotato
macrumors member
 
Join Date: Jan 2011
iPhone 5 Camera: Why 1/20 sec, f/2.4, ISO 50?

I looked at some of my iPhone 5 photos in Lightroom to view the exposure settings and found some of the photos baffling.

I took a nice photo of my wife at the Jim Thompson house in Bangkok in front of some baskets of colored silk threads and found it blurry.

You can't get a sharp photo at a 1/20 second exposure time, especially with a small, light camera phone and no tripod. I understand the aperture is fixed, so the only thing the phone can alter is the ISO. So, why would iOS choose an ISO of 50 for an outdoor daylight (albeit in the shade) photo resulting in a shutter speed of 1/20?

I (and I imagine all other photographers) would prefer iOS to set the ISO at 200 and give me a 1/60 shutter speed. Or ISO 400 for a 1/120 shutter speed. Forgive me if my exposure math is incorrect here.

It's a great camera, but come on Apple! Only give us an automatic ISO of 50 if we're shooting in the Sahara Desert in direct sunlight.

Anybody else experience this and have any suggestions for me?
BluePotato is offline   1 Reply With Quote
Old Dec 29, 2012, 05:39 AM   #2
stonyboys
macrumors 6502
 
Join Date: Oct 2012
Yeah man! Sooooo true
stonyboys is offline   0 Reply With Quote
Old Dec 29, 2012, 06:46 AM   #3
davehutch
macrumors 6502a
 
Join Date: Mar 2009
Location: Croxley, Herts
I know what you mean, but the actual focal length of the lens is 4.13mm so using the usual rule for hand-held photography, you shouldn't get blur at 1/20sec.
Are you sure it's hand-held shake or is the blur due to subject movement?
If it's subject movement, I'm afraid you'll need a camera with shutter priority mode for that amount of control
davehutch is offline   1 Reply With Quote
Old Dec 29, 2012, 08:09 AM   #4
hafr
Banned
 
Join Date: Sep 2011
Quote:
Originally Posted by BluePotato View Post
I looked at some of my iPhone 5 photos in Lightroom to view the exposure settings and found some of the photos baffling.

I took a nice photo of my wife at the Jim Thompson house in Bangkok in front of some baskets of colored silk threads and found it blurry.

You can't get a sharp photo at a 1/20 second exposure time, especially with a small, light camera phone and no tripod. I understand the aperture is fixed, so the only thing the phone can alter is the ISO. So, why would iOS choose an ISO of 50 for an outdoor daylight (albeit in the shade) photo resulting in a shutter speed of 1/20?

I (and I imagine all other photographers) would prefer iOS to set the ISO at 200 and give me a 1/60 shutter speed. Or ISO 400 for a 1/120 shutter speed. Forgive me if my exposure math is incorrect here.

It's a great camera, but come on Apple! Only give us an automatic ISO of 50 if we're shooting in the Sahara Desert in direct sunlight.

Anybody else experience this and have any suggestions for me?
I don't know if it's a valid solution for you, but Camera+ (about 2 dollars) has a function where you touch the screen with two fingers and separate focus and exposure. Just put exposure on a brighter object than the one you're focusing on and you'll be good
hafr is offline   0 Reply With Quote
Old Dec 29, 2012, 08:48 AM   #5
Merkie
macrumors 65816
 
Join Date: Oct 2008
I still think it'd be great if Apple allowed the SDK to operate the camera manually (shutter speed, focus, exposure, ISO). That way I think the phone would be able to take great night photos using a tripod and I can throw away my compact camera.
Merkie is offline   1 Reply With Quote
Old Dec 29, 2012, 08:50 AM   #6
corvus32
macrumors 6502a
 
Join Date: Sep 2009
Location: USA
Manual control would be much appreciated.

That or Apple could include OIS, but it would probably double the thickness of the phone la Nokia Lumia 920.
__________________
Asus Maximus VII Impact mITX motherboard / Intel i7-4790K / MSI GTX 980 Gaming OC / 8GB G.SKILL TridentX 2400MHz CAS 9 RAM
iPad Air (128GB) / Apple TV (3rd Gen)
corvus32 is offline   1 Reply With Quote
Old Dec 29, 2012, 08:57 AM   #7
Chris092881
macrumors 6502
 
Join Date: Dec 2012
I'd settle for a camera that didn't produce a purple hue at the corners when I took a photo with an out of frame light source. But in the past couple weeks I've learned to temper my expectations.
Chris092881 is offline   0 Reply With Quote
Old Dec 29, 2012, 09:08 AM   #8
Tea-Aholic
macrumors 6502
 
Join Date: Dec 2011
Location: Melbourne, Australia
Quote:
Originally Posted by BluePotato View Post
You can't get a sharp photo at a 1/20 second exposure time, especially with a small, light camera phone and no tripod. I understand the aperture is fixed, so the only thing the phone can alter is the ISO. So, why would iOS choose an ISO of 50 for an outdoor daylight (albeit in the shade) photo resulting in a shutter speed of 1/20?
Different cameras use different algorithms to set automatic exposure based on the light meter. In relatively good light, base ISO of 50 is used to get as much image quality as possible. The sensor is very small on the iPhone, thus noise is very apparent as the ISO gets higher.

Quote:
I (and I imagine all other photographers) would prefer iOS to set the ISO at 200 and give me a 1/60 shutter speed. Or ISO 400 for a 1/120 shutter speed. Forgive me if my exposure math is incorrect here.
ISO200 2-fstops faster than ISO50 so you will get a shutter of 1/80. ISO400 would give you 1/160.

Quote:
It's a great camera, but come on Apple! Only give us an automatic ISO of 50 if we're shooting in the Sahara Desert in direct sunlight.
I agree with you. Apple should keep the ISO a little higher in favour of more shutter speed. Especially when people don't know photography and wonder why their photos are so blurry. My digital camera keeps the shutter speed of at least 1/60 in auto mode and keeps increasing the ISO until it cannot anymore before it decreases the shutter speed. Maybe Apple needs to rethink their camera software.

Quote:
Anybody else experience this and have any suggestions for me?
My suggestion is to use the on screen virtual shutter button instead of the volume button. It take quite a bit of effort to push the button on top which introduces shake. Tap it several times, sometimes the first picture may be blurry but the second one can usually be much better.

And just a thought - buy a digital camera. It's invaluable for travel and even if you don't want to spend a lot, they are very affordable now and have quite a bit better image quality than mobile phone cameras.
__________________
MacBook Pro with Retina display (Mid 2014), 15.4-inch, 2.5 GHz/16 GB/512 GB/Iris Pro & GT 750M
Sony Xperia Z2, Black, 16 GB
iPad Air, Wi-Fi + Cellular, Space Grey, 64 GB
Tea-Aholic is offline   0 Reply With Quote
Old Dec 29, 2012, 09:15 AM   #9
Mr Kram
macrumors 65816
 
Join Date: Oct 2008
Quote:
Originally Posted by Tea-Aholic View Post

And just a thought - buy a digital camera. It's invaluable for travel and even if you don't want to spend a lot, they are very affordable now and have quite a bit better image quality than mobile phone cameras.
this is my thought. although the iphone 5 camera is fairly capable for daily use, i would at least take a P&S when i know i'll be snapping some memorable pics. if i'm taking pictures for a life event or i'm someplace abroad, i'm definitely lugging my DSLR.
__________________
21.5" iMac 20" iMac 23" ACD 11" MBA iPad Air 2 64GB iPad Air 32GB iPad Mini 3 32GB 4G 8GB iPod Nano Apple TV2 160 GB Apple TV iPhone 6 64GB iPhone 6 16 GB iPhone 5 32GB
Mr Kram is offline   0 Reply With Quote
Old Dec 29, 2012, 09:24 AM   #10
Tea-Aholic
macrumors 6502
 
Join Date: Dec 2011
Location: Melbourne, Australia
Quote:
Originally Posted by Mr Kram View Post
this is my thought. although the iphone 5 camera is fairly capable for daily use, i would at least take a P&S when i know i'll be snapping some memorable pics. if i'm taking pictures for a life event or i'm someplace abroad, i'm definitely lugging my DSLR.
Also consider a mirrorless camera for those who are currently using DSLRs but don't professionally need them. They are quite capable and produce very nice shots.
__________________
MacBook Pro with Retina display (Mid 2014), 15.4-inch, 2.5 GHz/16 GB/512 GB/Iris Pro & GT 750M
Sony Xperia Z2, Black, 16 GB
iPad Air, Wi-Fi + Cellular, Space Grey, 64 GB
Tea-Aholic is offline   0 Reply With Quote
Old Dec 29, 2012, 10:34 AM   #11
Givmeabrek
macrumors Demi-God
 
Join Date: Apr 2009
Location: NY
Quote:
Originally Posted by Tea-Aholic View Post
My suggestion is to use the on screen virtual shutter button instead of the volume button. It take quite a bit of effort to push the button on top which introduces shake. Tap it several times, sometimes the first picture may be blurry but the second one can usually be much better.
Don't tap it at all!! Press the virtual button and slowly release. That will give much better results.
Givmeabrek is offline   1 Reply With Quote
Old Dec 29, 2012, 12:49 PM   #12
Jimmy James
macrumors 68000
 
Join Date: Oct 2008
It's not truly 4.13. There is multiplier effect.
Jimmy James is offline   0 Reply With Quote
Old Dec 29, 2012, 02:45 PM   #13
Mrbobb
macrumors 601
 
Join Date: Aug 2012
Meanwhile, solid handheld photographic techniques still useful: Brace yourselves, use a timer.
Mrbobb is offline   0 Reply With Quote
Old Jan 2, 2013, 04:56 AM   #14
davehutch
macrumors 6502a
 
Join Date: Mar 2009
Location: Croxley, Herts
Quote:
Originally Posted by Jimmy James View Post
It's not truly 4.13. There is multiplier effect.
Just the data I got from Exif Viewer
davehutch is offline   0 Reply With Quote
Old Oct 29, 2013, 07:35 PM   #15
Menneisyys2
macrumors 603
 
Join Date: Jun 2011
Quote:
Originally Posted by BluePotato View Post
I looked at some of my iPhone 5 photos in Lightroom to view the exposure settings and found some of the photos baffling.

I took a nice photo of my wife at the Jim Thompson house in Bangkok in front of some baskets of colored silk threads and found it blurry.

You can't get a sharp photo at a 1/20 second exposure time, especially with a small, light camera phone and no tripod. I understand the aperture is fixed, so the only thing the phone can alter is the ISO. So, why would iOS choose an ISO of 50 for an outdoor daylight (albeit in the shade) photo resulting in a shutter speed of 1/20?

I (and I imagine all other photographers) would prefer iOS to set the ISO at 200 and give me a 1/60 shutter speed. Or ISO 400 for a 1/120 shutter speed. Forgive me if my exposure math is incorrect here.

It's a great camera, but come on Apple! Only give us an automatic ISO of 50 if we're shooting in the Sahara Desert in direct sunlight.

Anybody else experience this and have any suggestions for me?

Yes, I know this is an old thread...

The iPhone always chooses the lowest possible ISO to minimize noise. This can't be overridden. Go for, camera-wise, something better if you need to raise shutter speed. Basically, any Android, Symbian or WP handset allow for setting the ISO.
Menneisyys2 is offline   0 Reply With Quote

Reply
MacRumors Forums > iPhone, iPod and iPad > iPhone

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
mac isight camera or ipad camera view seen from iphone fiat iPhone and iPod touch Apps 0 Nov 16, 2013 08:39 PM
Iphone 4 iso 7 vjicecool iOS 7 134 Sep 27, 2013 06:19 AM
ISO 6 not as fast with my iPhone 4 bigchief iPhone 0 Sep 24, 2012 12:23 AM
How do I install Snow Leopard ISO on VMWare or become SL's ISO into DMG? gusbemac OS X 3 Sep 3, 2012 04:59 AM

Forum Jump

All times are GMT -5. The time now is 01:35 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC