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Occasional Contributor
Posts: 8
Registered: ‎12-24-2017
Accepted Solution

Powershot S70 AF modes question

OK, I've been a Nikon guy for 17 years.  But every company makes dumb marketing decisions, some of which become pet peeves of otherwise loyal customers.  So I picked up first an A520, then an S70 to use as a remote wildlife camera.  I can take pictures with Gphoto over USB, which means I can plug it into a Raspberry Pi computer and talk to that over WiFi.  All under Linux.

 

From studying the PDF manual and from playing with the camera, it looks like the only way to have the S70 choose the best AF area is to use "auto" on the mode selector on top.  I'd rather use Av mode, why did they have to lock this feature to the mode switch?  The A520 isn't that way, but the A520 I picked up for $12 has something wrong with the USB connector.  Plus the S70 shoots RAWs.

 

Am I missing something in the instructions?  Av mode gets me a nice AF box I can manually move around the screen.  Which would be fine if I were holding the camera, but I don't know where the bird or squirrel or whatever is going to appear.

Honored Contributor
Posts: 6,431
Registered: ‎08-13-2015

Re: Powershot S70 AF modes question

You want the camera to select and use an AF point, or area.  But, who or what activates the shutter?

----------------------------------------------------------------------------------------------------------------------------------------------------------

"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Esteemed Contributor
Posts: 2,260
Registered: ‎11-14-2012

Re: Powershot S70 AF modes question

If you have the option of selecting AI Servo I'd try that to see how it works out.

"A skill is developed through constant practice with a passion to improve, not bought."
Occasional Contributor
Posts: 8
Registered: ‎12-24-2017

Re: Powershot S70 AF modes question

I can do that over USB.  I'll probably plug it into a Raspberry Pi and either do it by pushing a button from in the house or use an algorithm that detects motion by looking for a change in the image.  Blame the inspration on this article http://shallowsky.com/blog/hardware/pi-motion-camera-2.html but I had a webcam in a birdfeeder once before.

Occasional Contributor
Posts: 8
Registered: ‎12-24-2017

Re: Powershot S70 AF modes question

[ Edited ]

"If you have the option of selecting AI Servo I'd try that to see how it works out."  I don't  know how to quote in this forum software.

 

I doubt it, the word "servo" isn't in the manual PDF anywhere.  It may be possible to change it from Gphoto but it isn't going to know where the critter is either.  Only something that can find the closest object could do that.

 

OK, maybe, if I'm doing motion detection by looking for a change in the image I can use that as an AF area.  Except I wasn't sure I was going to use the Canon for that, it depends on how fast the process can be.  It looks like it only goes down to 640x480 and I could use something more like 15x10.

 

A Gphoto "summary" connected to the camera says this, I suppose I'd have to try individual commands to see how they work.  Or find an example somewhere online and try it here.

................

Camera summary:
Manufacturer: Canon Inc.
Model: Canon PowerShot S70
  Version: 1-1.0.0.0
Vendor Extension ID: 0xb (1.0)

Capture Formats: JPEG CRW
Display Formats: Association/Directory, JPEG, MS AVI, MS Wave, CRW, Script

Device Capabilities:
	File Download, File Deletion, File Upload
	Generic Image Capture, No Open Capture, Canon Capture

Storage Devices Summary:
store_00010001:
	StorageDescription: None
	VolumeLabel: D
	Storage Type: Removable RAM (memory card)
	Filesystemtype: Digital Camera Layout (DCIM)
	Access Capability: Read-Write
	Maximum Capability: 128034816 (122 MB)
	Free Space (Bytes): 120424448 (114 MB)
	Free Space (Images): -1
store_80000001:
	StorageDescription: None
	VolumeLabel: V
	Storage Type: Builtin RAM
	Filesystemtype: Unknown: 0x8001

	Access Capability: Read-Write
	Maximum Capability: 0 (0 MB)
	Free Space (Bytes): 0 (0 MB)
	Free Space (Images): -1

Device Property Summary:
Beep Mode(0xd001)Smiley Sadreadwrite) (type=0x2) Enumeration [0,1] value: Off (1)
Battery Type(0xd002)Smiley Sadread only) (type=0x4) Enumeration [0,1,2,3,4,5] value: Lithium Ion (2)
Battery Mode(0xd003)Smiley Sadread only) (type=0x6) Enumeration [0,1,2,3] value: Normal (1)
Size Quality Mode(0xd02c)Smiley Sadread only) (type=0x4006) Enumeration [
	a[6] 2304,3072,1,0,0,0,
	a[6] 2304,3072,6,0,0,0,
	a[6] 2304,3072,11,0,0,0,
	a[6] 1944,2592,2,0,0,0,
	a[6] 1944,2592,7,0,0,0,
	a[6] 1944,2592,12,0,0,0,
	a[6] 1536,2048,3,0,0,0,
	a[6] 1536,2048,8,0,0,0,
	a[6] 1536,2048,13,0,0,0,
	a[6] 1200,1600,17,0,0,0,
	a[6] 1200,1600,18,0,0,0,
	a[6] 1200,1600,19,0,0,0,
	a[6] 480,640,5,0,0,0,
	a[6] 480,640,10,0,0,0,
	a[6] 480,640,15,0,0,0
	] value: a[6] 0,0,0,0,0,0
Supported Thumb Size(0xd02d)Smiley Sadread only) (type=0x0) Undefined
Size of Output Data from Camera(0xd02e)Smiley Sadread only) (type=0x6) 20480
Size of Input Data to Camera(0xd02f)Smiley Sadread only) (type=0x6) 5120
Remote API Version(0xd030)Smiley Sadread only) (type=0x6) 256
Firmware Version(0xd031)Smiley Sadread only) (type=0x6) 16777216
Camera Model(0xd032)Smiley Sadread only) (type=0xffff) 'Canon PowerShot S70'
Camera Owner(0xd033)Smiley Sadreadwrite) (type=0x4002) a[0] 
UNIX Time(0xd034)Smiley Sadreadwrite) (type=0x6) 1514125253
Event Emulate Mode(0xd045)Smiley Sadreadwrite) (type=0x4) Enumeration [1,2,3,4,5,6,7] value: 1
DPOF Version(0xd046)Smiley Sadread only) (type=0x4) 257
Type of Slideshow(0xd047)Smiley Sadread only) (type=0x4) 2
Average Filesizes(0xd048)Smiley Sadread only) (type=0x0) Undefined
Model ID(0xd049)Smiley Sadread only) (type=0x6) 20447232
Property 0xd04bSmiley Sadread only) (type=0x2) 0

 

Honored Contributor
Posts: 6,431
Registered: ‎08-13-2015

Re: Powershot S70 AF modes question


alan01346 wrote:

"If you have the option of selecting AI Servo I'd try that to see how it works out."  I don't  know how to quote in this forum software.

 

I doubt it, the word "servo" isn't in the manual PDF anywhere.  It may be possible to change it from Gphoto but it isn't going to know where the critter is either.  Only something that can find the closest object could do that.

 

OK, maybe, if I'm doing motion detection by looking for a change in the image I can use that as an AF area.  Except I wasn't sure I was going to use the Canon for that, it depends on how fast the process can be.  It looks like it only goes down to 640x480 and I could use something more like 15x10.

 

A Gphoto "summary" connected to the camera says this, I suppose I'd have to try indivual commands to see how they work.  Or find an example somewhere online and try it here.

................

Camera summary:
Manufacturer: Canon Inc.
Model: Canon PowerShot S70
  Version: 1-1.0.0.0
Vendor Extension ID: 0xb (1.0)

Capture Formats: JPEG CRW
Display Formats: Association/Directory, JPEG, MS AVI, MS Wave, CRW, Script

Device Capabilities:
	File Download, File Deletion, File Upload
	Generic Image Capture, No Open Capture, Canon Capture

Storage Devices Summary:
store_00010001:
	StorageDescription: None
	VolumeLabel: D
	Storage Type: Removable RAM (memory card)
	Filesystemtype: Digital Camera Layout (DCIM)
	Access Capability: Read-Write
	Maximum Capability: 128034816 (122 MB)
	Free Space (Bytes): 120424448 (114 MB)
	Free Space (Images): -1
store_80000001:
	StorageDescription: None
	VolumeLabel: V
	Storage Type: Builtin RAM
	Filesystemtype: Unknown: 0x8001

	Access Capability: Read-Write
	Maximum Capability: 0 (0 MB)
	Free Space (Bytes): 0 (0 MB)
	Free Space (Images): -1

Device Property Summary:
Beep Mode(0xd001)Smiley Sadreadwrite) (type=0x2) Enumeration [0,1] value: Off (1)
Battery Type(0xd002)Smiley Sadread only) (type=0x4) Enumeration [0,1,2,3,4,5] value: Lithium Ion (2)
Battery Mode(0xd003)Smiley Sadread only) (type=0x6) Enumeration [0,1,2,3] value: Normal (1)
Size Quality Mode(0xd02c)Smiley Sadread only) (type=0x4006) Enumeration [
	a[6] 2304,3072,1,0,0,0,
	a[6] 2304,3072,6,0,0,0,
	a[6] 2304,3072,11,0,0,0,
	a[6] 1944,2592,2,0,0,0,
	a[6] 1944,2592,7,0,0,0,
	a[6] 1944,2592,12,0,0,0,
	a[6] 1536,2048,3,0,0,0,
	a[6] 1536,2048,8,0,0,0,
	a[6] 1536,2048,13,0,0,0,
	a[6] 1200,1600,17,0,0,0,
	a[6] 1200,1600,18,0,0,0,
	a[6] 1200,1600,19,0,0,0,
	a[6] 480,640,5,0,0,0,
	a[6] 480,640,10,0,0,0,
	a[6] 480,640,15,0,0,0
	] value: a[6] 0,0,0,0,0,0
Supported Thumb Size(0xd02d)Smiley Sadread only) (type=0x0) Undefined
Size of Output Data from Camera(0xd02e)Smiley Sadread only) (type=0x6) 20480
Size of Input Data to Camera(0xd02f)Smiley Sadread only) (type=0x6) 5120
Remote API Version(0xd030)Smiley Sadread only) (type=0x6) 256
Firmware Version(0xd031)Smiley Sadread only) (type=0x6) 16777216
Camera Model(0xd032)Smiley Sadread only) (type=0xffff) 'Canon PowerShot S70'
Camera Owner(0xd033)Smiley Sadreadwrite) (type=0x4002) a[0] 
UNIX Time(0xd034)Smiley Sadreadwrite) (type=0x6) 1514125253
Event Emulate Mode(0xd045)Smiley Sadreadwrite) (type=0x4) Enumeration [1,2,3,4,5,6,7] value: 1
DPOF Version(0xd046)Smiley Sadread only) (type=0x4) 257
Type of Slideshow(0xd047)Smiley Sadread only) (type=0x4) 2
Average Filesizes(0xd048)Smiley Sadread only) (type=0x0) Undefined
Model ID(0xd049)Smiley Sadread only) (type=0x6) 20447232
Property 0xd04bSmiley Sadread only) (type=0x2) 0


The camera specifications refer to "flexi-zone AF/AE" mode.  Most digital cameras have two basic focusing modes: a fixed, static mode; and a dynamic mode, which is controlled by the user.

 

If you are looking for programming assistance, I am not sure if this is the correct place for that topic.  I have no idea where to recommend that you go for assistance.  I would suspect that info would be included in whatever SDK you might be using.

----------------------------------------------------------------------------------------------------------------------------------------------------------

"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Occasional Contributor
Posts: 8
Registered: ‎12-24-2017

Re: Powershot S70 AF modes question

[ Edited ]

Because somebody may find this helpful I'm posting these notes here.  This is on a Raspbery Pi, gphoto2 and libgphoto were built fresh from the tarballs at sourceforge.net..  Once I started getting things working I kept making little scripts.  Which is the way most people use it, making scripts to do what they need most often.  I'm only specifying the camera because there's more than 1 plugged in.  I haven't experimented with changing settings like image size yet (or know how at this point).  The preview image I got was 320x240, that will do for motion detection.  It's probably the viewfinder size.

 

Gphoto's documentation is not wonderful but it comes from Germany so that's understandable.  There are authors in a few countries I think.  Join the mailing list to ask questions.

 

Using ; as a comment delimiter here, gphoto doesn't actually know it.

 

; list all configs:

gphoto2 --port usb:. --camera "Canon Powershot S70 (PTP mode)" \
--list-all-config

 

; list files on the camera

gphoto2 --port usb:. --camera "Canon Powershot S70 (PTP mode)" \
--list-files

 

; capture a preview image and download to the computer

gphoto2 --port usb:. --camera "Canon Powershot S70 (PTP mode)" \
--capture-preview

 

; Start an interactive shell (q to quit, help for help)

gphoto2 --port usb:. --camera "Canon Powershot S70 (PTP mode)" \
--shell

 

; Take a picture and download to the computer

gphoto2 --port usb:. --camera "Canon Powershot S70 (PTP mode)" \
--capture-image-and-download

 

You can see that they're basically all the same thing, only the command at the end is different.  You can get a list of those from the gphoto2 man page or by calling gphoto2 and feeding it any gibberish it can't understand.  If you want to do time-lapse this might be useful (anything in [ ] is optional, | means or):

[-F|--frames=COUNT] [-I|--interval=SECONDS] [--reset-interval]

 

Oh, the gphoto homepage: http://gphoto.sourceforge.net/

 

Well, it's Mon Dec 25 00:01:41 EST 2017, Merry Christmas

 

Occasional Contributor
Posts: 8
Registered: ‎12-24-2017

Re: Powershot S70 AF modes question

[ Edited ]

This seems to have done it.  I can do

--get-config focusingpoint

and that originally said it was in center mode.  Then I did

--set-config focusingpoint=1

and when I ran it again it said it was in auto mode:

 

Label: Focusing Point
Readonly: 0
Type: RADIO
Current: Multiple Focusing Points, Auto
Choice: 0 Multiple Focusing Points (Center)
Choice: 1 Multiple Focusing Points, Auto
END

 

I took a picture with --capture-image-and-download that looks reasonable, then I did --get-config focusingpoint again and it still says it's in auto mode.

 

There are also the CHDKhacks at http://chdk.wikia.com/wiki/CHDK

but not for this camera model.

Highlighted
Occasional Contributor
Posts: 8
Registered: ‎12-24-2017

Re: Powershot S70 AF modes question

Gphoto can do this on the S70:

Gphoto on a Canon PowerShot S70

/main/actions/focuslock
/main/actions/opcode
/main/settings/datetime
/main/settings/output
/main/settings/ownername
/main/settings/capturetarget
/main/settings/capture
/main/status/serialnumber
/main/status/manufacturer
/main/status/cameramodel
/main/status/deviceversion
/main/status/vendorextension
/main/status/model
/main/status/firmwareversion
/main/status/orientation
/main/imgsettings/imagequality
/main/imgsettings/imageformat
/main/imgsettings/imagesize
/main/imgsettings/iso
/main/imgsettings/whitebalance
/main/imgsettings/photoeffect
/main/capturesettings/zoom
/main/capturesettings/assistlight
/main/capturesettings/autorotation
/main/capturesettings/selftimer
/main/capturesettings/exposurecompensation
/main/capturesettings/flashcompensation
/main/capturesettings/flashmode
/main/capturesettings/shootingmode
/main/capturesettings/aperture
/main/capturesettings/avopen
/main/capturesettings/avmax
/main/capturesettings/focusingpoint
/main/capturesettings/shutterspeed
/main/capturesettings/meteringmode
/main/capturesettings/afdistance

Exploring the numbered d*** config options (Canon S70)

d001	BeepMode	writeable	menu	2 options
d002	Battery type	readonly	menu	6 options
d003	Battery Mode	readonly	menu	4 options
d005	Camera Mode	readonly	TEXT	CURRENT 32(?)
d006	Image Quality	writeable	menu	3 options
d007	Full View File Format	writeable	menu	2 options
d008	Image Size	writeable	menu	5 options
d009	Self Time	readonly	text	current is 100
d00a	Flash Mode	writeable	menu	5 options
d00b	Beep	writeable	menu	2 options
d00c	Shooting Mode	writeable	menu	4 options
d00e	Drive Mode	readonly	text	current 0
d00f	Zoom	readonly	text	current 0
d010	Metering Mode	writeable	menu	3 options
d011	AF Distance	writeable	menu	2 options
d012	Focusing Point	writeable	menu	2 options
d013	White Balance	writeable	menu	8 options
d015	AF Mode	readonly	text	current 0
d017	Contrast	writeable	menu	1 option
d018	Color Gain	writeable	menu	1 option
d019	Sharpness	writeable	menu	1 option
d01c	ISO Speed	writeable	menu	5 options
d01d	Aperture	writeable	menu	1 option current 40
d01e	Shutter Speed	writeable	menu	1 option current 112
d01f	Exposure Compensation	writeable	menu	13 options current 24
d020	Flash Compensation	writeable	menu	13 options current 24
d023	Av Open	readonly	text	current 32
d024	Av Max	readonly	text	current 56
d025	Focal Length	readonly	text	current 186
d026	Focal Length Tele	readonly	text	current 662
d027	Focal Length Wide	readonly	text	current 186
d028	Focal Length Denominator	readonly	text	current 32
d029	Capture Transfer Mode	writeable	menu	15 options current 13
d02a	Zoom	writeable	menu	15 options current 0
d02c	Size Quality Mode	readonly	menu	1 choice current null
d02d	Supported Thumb Size	readonly	text	current null
d02e	Size of Output Data from Camera	readonly	text	current 20480
d02f	Size of Input Data to Camera	readonly	text	current 5120
d030	Remote API Version	readonly	text	current 256
d031	Firmware Version	readonly	text	current 16777216
d032	Camera Model	readonly	text	current "Current: Canon PowerShot S70"
d033	Camera Owner	writeable	text	current null
d034	UNIX Time	writeable	text	(reads camera's clock)
d036	Camera Output	writeable	menu	3 options current 2
d037	Disp Av	readonly	text	current 0
d038	Av Open Apex	readonly	text	current 32
d039	Digital Zoom Magnification	readonly	text	current 3072
d03a	Ml Spot Position	readonly	text	current 0
d03b	Disp Av Max	readonly	text	current 0
d03c	Av Max Apex	readonly	text	current 56
d03d	EZoom Start Position	readonly	text	current 9
d03e	Focal Length Tele	readonly	text	current 662
d03f	EZoom Size of Tele	readonly	text	current 752
d040	Photo Effect	writeable	menu	6 options
d041	Assist Light	writeable	menu	2 options
d042	Flash Quantity Count	writeable	menu	1 option
d043	Rotation Angle	readonly	text	current 0
d044	Rotation Scene	writeable	menu	2 options
d045	Event Emulate Mode	writeable	menu	7 options
d046	DPOF Version	readonly	text	current 257
d047	Type of Slideshow	readonly	text	current 2
d048	Average Filesizes	readonly	text	current null
d049	Model ID	readonly	text	current 20447232
d04b	PTP Property 0xd04b	readonly	text	current 0
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