Focus Speed - Revision history

WikiSysop: /* Results (New) */

2017-05-31T17:27:01Z

Results (New)

← Older revision		Revision as of 17:27, 31 May 2017
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	3. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms		3. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms

	4. Canon EF-S 18-55mm IS STM (Stepper motor) -> 222ms		4. Canon EF-S 18-55mm IS STM (Stepper motor) -> 204-222ms (204ms with equivalent available light as above f/2.8 lenses)

	The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor.		The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor.

	==Results (Old)==		==Results (Old)==

WikiSysop at 17:17, 31 May 2017

2017-05-31T17:17:51Z

← Older revision		Revision as of 17:17, 31 May 2017
Line 16:		Line 16:
	3. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms		3. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms

	4. Canon EF-S 18-55mm IS STM (Stepper motor) -> ms		4. Canon EF-S 18-55mm IS STM (Stepper motor) -> 222ms

	The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor.		The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor.

WikiSysop at 20:55, 30 May 2017

2017-05-30T20:55:43Z

← Older revision		Revision as of 20:55, 30 May 2017
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	2. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 262ms		2. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 262ms

	2. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms		3. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms

	The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor~~. Unfortunately I have sold my Canon EF-S 18-55mm IS STM lens so it will be a while before I can re-test that in the same setup~~.		4. Canon EF-S 18-55mm IS STM (Stepper motor) -> ms

			The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor.

	==Results (Old)==		==Results (Old)==

WikiSysop at 16:58, 17 April 2017

2017-04-17T16:58:32Z

← Older revision		Revision as of 16:58, 17 April 2017
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	This is a method that I used to benchmark the focusing speed (originally from MFD to ~1.7m target, in the new setup from fixed FD of 14" to FD of 8') of several lenses/motor technologies. The setup involves using a DSLR, Arduino (used a Maple Mini clone for the hardware) connected to an LED, and a PC for setting the delay. The Arduino triggers the shutter and turns on the LED after a set delay, if the LED is not on by the time the picture is taken, the delay should be increased, and vice versa until the focus time is converged.		This is a method that I used to benchmark the focusing speed (originally from MFD to ~1.7m target, in the new setup from fixed FD of 14" to FD of 8') of several lenses/motor technologies. The setup involves using a DSLR, Arduino (used a Maple Mini clone for the hardware) connected to an LED, and a PC for setting the delay. The Arduino triggers the shutter and turns on the LED after a set delay, if the LED is not on by the time the picture is taken, the delay should be increased, and vice versa until the focus time is converged.

	[[File:Test.jpg\|thumb\|right\|Picture of the test setup with a ~~450D~~ and Canon EF-S 17-~~85mm~~ IS USM lens.]]		[[File:Test.jpg\|thumb\|right\|Picture of the test setup with a 700D and Canon EF-S 17-55mm IS USM lens.]]

	==Results (New)==		==Results (New)==
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	2. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 262ms		2. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 262ms

	The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM.		2. Canon EF 50mm f/1.8 (DC micro motor) -> 311ms

			The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM, ~27% faster than micro motor, and micro HSM is ~16% faster than micro motor. Unfortunately I have sold my Canon EF-S 18-55mm IS STM lens so it will be a while before I can re-test that in the same setup.

	==Results (Old)==		==Results (Old)==

WikiSysop at 16:48, 17 April 2017

2017-04-17T16:48:58Z

← Older revision		Revision as of 16:48, 17 April 2017
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	1. Canon EF-S 17-55mm f/2.8 IS USM (Ring USM with FTM) -> 227ms		1. Canon EF-S 17-55mm f/2.8 IS USM (Ring USM with FTM) -> 227ms

	The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms.		2. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 262ms

			The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms. From this more controlled test it appears that ring USM is ~13% faster than micro HSM.

	==Results (Old)==		==Results (Old)==

WikiSysop at 22:20, 14 April 2017

2017-04-14T22:20:33Z

← Older revision		Revision as of 22:20, 14 April 2017
Line 1:		Line 1:
	This is a method that I used to benchmark the focusing speed (from MFD to ~1.7m target) of several lenses/motor technologies. The setup involves using a DSLR, Arduino (used a Maple Mini clone for the hardware) connected to an LED, and a PC for setting the delay. The Arduino triggers the shutter and turns on the LED after a set delay, if the LED is not on by the time the picture is taken, the delay should be increased, and vice versa until the focus time is converged.		This is a method that I used to benchmark the focusing speed (originally from MFD to ~1.7m target, in the new setup from fixed FD of 14" to FD of 8') of several lenses/motor technologies. The setup involves using a DSLR, Arduino (used a Maple Mini clone for the hardware) connected to an LED, and a PC for setting the delay. The Arduino triggers the shutter and turns on the LED after a set delay, if the LED is not on by the time the picture is taken, the delay should be increased, and vice versa until the focus time is converged.

	[[File:Test.jpg\|thumb\|right\|Picture of the test setup with a 450D and Canon EF-S 17-85mm IS USM lens.]]		[[File:Test.jpg\|thumb\|right\|Picture of the test setup with a 450D and Canon EF-S 17-85mm IS USM lens.]]

	==Results==		==Results (New)==

			Setup was revised to the following conditions:
			* Focus speed measured from 14″ distance to 8′ distance.
			* Lighting (per 700D metering sensor): 1/60s at f/2.8, ISO200 (HTP on).
			* Lens set to ~50mm focal length.

			1. Canon EF-S 17-55mm f/2.8 IS USM (Ring USM with FTM) -> 227ms

			The numbers above do not include the native shutter lag, which for the 700D measured (lens set to MF, manual mode 1/60s shutter, f/2.8): 162-163ms.

			==Results (Old)==

	1. Canon EF-S 18-55 IS STM -> 500ms		1. Canon EF-S 18-55 IS STM -> 500ms
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	3. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 472ms		3. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 472ms

	The numbers above do not include the native shutter lag, which for the 7D measured (in manual focus) at: 120-125 ms. The native shutter lag was also measured for the 450D at 171ms.		The numbers above do not include the native shutter lag, which for the 7D measured (in manual focus) at: 120-125 ms. The native shutter lag was also measured for the 450D at 171ms.

	==Arduino Code==		==Arduino Code==

WikiSysop at 01:36, 29 March 2017

2017-03-29T01:36:33Z

← Older revision		Revision as of 01:36, 29 March 2017
Line 1:		Line 1:
	This is a method that I used to benchmark the focusing speed (from MFD to ~1.7m target) of several lenses/motor technologies. The setup involves using a DSLR, Arduino (used a Maple Mini clone for the hardware) connected to an LED, and a PC for setting the delay. The Arduino ~~turns on an LED in view of the camera,~~ triggers the shutter and turns ~~off~~ the LED after a set delay, if the LED is ~~still~~ on by the time the picture is taken, the delay should be increased, and vice versa until the focus time is converged.		This is a method that I used to benchmark the focusing speed (from MFD to ~1.7m target) of several lenses/motor technologies. The setup involves using a DSLR, Arduino (used a Maple Mini clone for the hardware) connected to an LED, and a PC for setting the delay. The Arduino triggers the shutter and turns on the LED after a set delay, if the LED is not on by the time the picture is taken, the delay should be increased, and vice versa until the focus time is converged.

	[[File:Test.jpg\|thumb\|right\|Picture of the test setup with a 450D and Canon EF-S 17-85mm IS USM lens.]]		[[File:Test.jpg\|thumb\|right\|Picture of the test setup with a 450D and Canon EF-S 17-85mm IS USM lens.]]

WikiSysop: /* Results */

2017-03-29T01:35:17Z

Results

← Older revision		Revision as of 01:35, 29 March 2017
Line 11:		Line 11:
	3. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 472ms		3. Sigma DG 17-50 f/2.8 OS HSM (Micro HSM without FTM) -> 472ms

	The numbers above do not include the native shutter lag, which for the 7D measured (in manual focus) at: 120-125 ms.		The numbers above do not include the native shutter lag, which for the 7D measured (in manual focus) at: 120-125 ms. The native shutter lag was also measured for the 450D at 171ms.

	==Arduino Code==		==Arduino Code==

WikiSysop: /* Video */

2017-03-28T08:57:42Z

Video

← Older revision		Revision as of 08:57, 28 March 2017
Line 81:		Line 81:

	==Video==		==Video==
	<HTML5video type="youtube" width="400" height="300" autoplay="false"></HTML5video>		<HTML5video type="youtube" width="400" height="300" autoplay="false">gVeTLTSSKLM</HTML5video>

WikiSysop: /* Improvements and Notes */

2017-03-28T06:20:00Z

Improvements and Notes

← Older revision		Revision as of 06:20, 28 March 2017
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	** Target (high contrast) is fixed and camera is pointing at same part of the target from lens to lens		** Target (high contrast) is fixed and camera is pointing at same part of the target from lens to lens
	** Focal length is common between lenses compared (if possible)		** Focal length is common between lenses compared (if possible)

			==Video==
			<HTML5video type="youtube" width="400" height="300" autoplay="false"></HTML5video>