Shutter speed

LesC · 03-09-2012, 09:31 AM

I was messing about recently with the drops of water concept. To try and freeze several drops in a row, I set the shutter to 1/8000 of a second, and shot on continuous mode. The noise was quite frightening in that I kept on thinking "How long will it take to wear the shutter mechanism out?". Thinking about it afterwards, I was wondering if the shutter actually closes when shooting in continuous mode. Are the sensors merely switched on and off, or does the shutter actually close. I hope to goodness that the mirror stays locked up when shooting continuous! Does anyone know?

I have had my K-5 for a month now, and shame, my poor K20D is feeling very neglected.

beholder3 · 03-09-2012, 10:14 AM

[deleted]

Gimbal · 03-09-2012, 11:28 AM

If you use live view at least the mirror will stay up. That might save a little wear and tear.

LesC · 03-09-2012, 01:58 PM

Hate live view (struggle to see screen), but I think there is a mirror lock function. must rtm

LesC · 03-09-2012, 02:00 PM

Do you know what determines the exposure time, in electrical impulse that turns the sensor on and off, or how long shutter is open? May be stupid question but I just can not get my brain around the shutter being open for 1/8000 of a second.

**Lowell Goudge** · 03-09-2012, 02:02 PM

Originally posted by LesC

I was messing about recently with the drops of water concept. To try and freeze several drops in a row, I set the shutter to 1/8000 of a second, and shot on continuous mode. The noise was quite frightening in that I kept on thinking "How long will it take to wear the shutter mechanism out?". Thinking about it afterwards, I was wondering if the shutter actually closes when shooting in continuous mode. Are the sensors merely switched on and off, or does the shutter actually close. I hope to goodness that the mirror stays locked up when shooting continuous! Does anyone know?

I have had my K-5 for a month now, and shame, my poor K20D is feeling very neglected.

as others have indicated the shutter opens and closes, you have to remember that 1/8000 of a second is achieved by a narrow slit moving across the sensor at about 1/200 of a second.

this wlll lead to blurred water drops

the best way to really capture this is using a flash and lock the shutter open.

**Ex Finn.** · 03-10-2012, 05:42 AM

Lot of flexing and bouncing going on.

You Tube

RonHendriks1966 · 03-10-2012, 10:47 AM

That looks great. Can someone just make a picture of it with HSS?

**Ex Finn.** · 03-10-2012, 03:32 PM

Originally posted by RonHendriks1966

That looks great. Can someone just make a picture of it with HSS?

It could take couple tries to get it right

.

LesC · 03-11-2012, 03:14 AM

[IMG]c:\fb\2012\upload.jpg[/IMG]

LesC · 03-11-2012, 03:19 AM

Thanks for the clip. Amazing technology these days.
How did you insert the clip? I see that I can load a url, but can I insert a jpg? I wanted to show what I did manage to achieve. Got the technique right, was just interested in the mechanics, which this video shows superbly.

**Ex Finn.** · 03-11-2012, 08:24 AM

I did "copy and paste" the url after clicking on the "insert link" icon.
To load a image just click on the "attachments" paper-clip and browse to the folder you want the picture from. Then click on the image, after that "open" it and hit the upload .

**Digitalis** · 03-11-2012, 05:44 PM

you're approaching the subject in entirely the wrong way. What you need is a bright pulse of light to act as a "shutter" as opposed to using the physical shutter in the camera to stop motion. A pulse of light from a flash can be over 8X the maximum shutter speed of any camera, and since Xenon arc flash tubes don't wear out anywhere near as quickly as shutter units do, and it is certainly the safer option.

allow me to illustrate:

that image was captured with a Sigma 180mm f/3.5 with a wireless AF540FGZ set to 1/8th power the camera's shutter speed was only 1/180th but the pulse of light from the flash would have been closer to 1/12000th

Originally posted by Ex Finn.

Lot of flexing and bouncing going on.

okay that is a little disturbing *looks at Nikon D3s* I wonder what a 5000FPS slow motion video of the shutter in the Pentax 67 would look like.

LesC · 03-11-2012, 11:03 PM

LesC · 03-11-2012, 11:05 PM

Thanks for all the responses. This is what I managed to get. I see I uploaded the original, not corrected. Need to get a flash capable of what is required. Thanks for all the tips.

03-09-2012, 09:31 AM	#1
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12	Shutter speed I was messing about recently with the drops of water concept. To try and freeze several drops in a row, I set the shutter to 1/8000 of a second, and shot on continuous mode. The noise was quite frightening in that I kept on thinking "How long will it take to wear the shutter mechanism out?". Thinking about it afterwards, I was wondering if the shutter actually closes when shooting in continuous mode. Are the sensors merely switched on and off, or does the shutter actually close. I hope to goodness that the mirror stays locked up when shooting continuous! Does anyone know? I have had my K-5 for a month now, and shame, my poor K20D is feeling very neglected.

03-09-2012, 10:14 AM	#2
beholder3 Pentaxian Join Date: Dec 2011 Posts: 3,112	[deleted] Last edited by beholder3; 08-12-2013 at 01:42 AM. Reason: [deleted]

03-10-2012, 03:32 PM	#9
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Originally posted by RonHendriks1966 That looks great. Can someone just make a picture of it with HSS? It could take couple tries to get it right.

03-11-2012, 05:44 PM	#13
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,694	you're approaching the subject in entirely the wrong way. What you need is a bright pulse of light to act as a "shutter" as opposed to using the physical shutter in the camera to stop motion. A pulse of light from a flash can be over 8X the maximum shutter speed of any camera, and since Xenon arc flash tubes don't wear out anywhere near as quickly as shutter units do, and it is certainly the safer option. allow me to illustrate: that image was captured with a Sigma 180mm f/3.5 with a wireless AF540FGZ set to 1/8th power the camera's shutter speed was only 1/180th but the pulse of light from the flash would have been closer to 1/12000th Originally posted by Ex Finn. Lot of flexing and bouncing going on. okay that is a little disturbing looks at Nikon D3s I wonder what a 5000FPS slow motion video of the shutter in the Pentax 67 would look like. Last edited by Digitalis; 03-12-2012 at 12:02 AM.

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03-09-2012, 11:28 AM	#3
Gimbal Pentaxian Join Date: Apr 2007 Location: Sweden Posts: 2,106	If you use live view at least the mirror will stay up. That might save a little wear and tear.

03-09-2012, 01:58 PM	#4
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12 Original Poster	Hate live view (struggle to see screen), but I think there is a mirror lock function. must rtm

03-09-2012, 02:00 PM	#5
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12 Original Poster	Do you know what determines the exposure time, in electrical impulse that turns the sensor on and off, or how long shutter is open? May be stupid question but I just can not get my brain around the shutter being open for 1/8000 of a second.

03-09-2012, 02:02 PM	#6
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,891	Originally posted by LesC I was messing about recently with the drops of water concept. To try and freeze several drops in a row, I set the shutter to 1/8000 of a second, and shot on continuous mode. The noise was quite frightening in that I kept on thinking "How long will it take to wear the shutter mechanism out?". Thinking about it afterwards, I was wondering if the shutter actually closes when shooting in continuous mode. Are the sensors merely switched on and off, or does the shutter actually close. I hope to goodness that the mirror stays locked up when shooting continuous! Does anyone know? I have had my K-5 for a month now, and shame, my poor K20D is feeling very neglected. as others have indicated the shutter opens and closes, you have to remember that 1/8000 of a second is achieved by a narrow slit moving across the sensor at about 1/200 of a second. this wlll lead to blurred water drops the best way to really capture this is using a flash and lock the shutter open.

03-10-2012, 10:47 AM	#8
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	That looks great. Can someone just make a picture of it with HSS?

03-11-2012, 03:14 AM	#10
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12 Original Poster	[IMG]c:\fb\2012\upload.jpg[/IMG]

03-11-2012, 03:19 AM	#11
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12 Original Poster	Thanks for the clip. Amazing technology these days. How did you insert the clip? I see that I can load a url, but can I insert a jpg? I wanted to show what I did manage to achieve. Got the technique right, was just interested in the mechanics, which this video shows superbly.

03-11-2012, 08:24 AM	#12
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	I did "copy and paste" the url after clicking on the "insert link" icon. To load a image just click on the "attachments" paper-clip and browse to the folder you want the picture from. Then click on the image, after that "open" it and hit the upload .

03-11-2012, 11:03 PM	#14
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12 Original Poster

03-11-2012, 11:05 PM	#15
LesC New Member Join Date: Oct 2010 Location: Port Elizabeth Photos: Gallery Posts: 12 Original Poster	Thanks for all the responses. This is what I managed to get. I see I uploaded the original, not corrected. Need to get a flash capable of what is required. Thanks for all the tips.