| View previous topic :: View next topic |
| Author |
Message |
rawhead
Joined: 09 Feb 2009
Posts: 1525
Location: Boston, MA
Expire: 2014-04-29
|
 Posted: Sun Jul 05, 2009 2:30 pm Post subject: Accurately measure your slower shutter speeds. |
 |
|
rawhead wrote:
Here's a different kind of "technique". Ever need to test the accuracy of your camera's shutter speed? Perhaps when you're listing an item on Ebay?
I've found a fairly accurate way of measuring the accuracy of, as least the slower shutter speeds, down to 1/8s or maybe 1/15 or so.
Basically, you use your computer and a software that can record sound and display waveforms, and make recordings of the shutter sounds of your camera.
I use an app called Sound Studio on my Mac. Then, select the waveform that corresponds to the shutter sound, making sure you select from the original "attack" of the mirror flap/shutter opening up to the point the shutter closes. The length of the selection is your actual shutter speed. Here, I selected a waveform corresponding to 1/4s on my Pentacon Six TL. You can see it's pretty accurate (note where it says Length: 0'00.244).
This won't work for the faster shutter speeds, as it becomes increasingly difficult to tell apart the actual shutter opening/closing from all the other noises (mirror flap, etc.)
_________________
Sony α7R, Pentax 67II, Kiev-60, Hasselblad 203FE, 903SWC, Graflex Norita 66, Mamiya M645 1000s, Burke & James 8x10, Graflex Pacemaker Speed Graphic (4x5 and 3x4), Century Graphic (2x3), R.B. Graflex Seried D, Rolleiflex SL66E, Rolleiflex 2.8C Xenotar, Mamiya C330f, a few M42, six P6, three OM, four Hasselblad, two Pentax 67, two Mamiya 645, one Noritar, and a sprinkle of EF. Oh, and an Aero Ektar and Leica Noctilux
Last edited by rawhead on Sun Jul 05, 2009 2:45 pm; edited 1 time in total |
|
| Back to top |
|
 |
Orio
Joined: 24 Feb 2007
Posts: 29545
Location: West Emilia
Expire: 2012-12-04
|
| Posted: Sun Jul 05, 2009 2:35 pm Post subject: |
|
|
Orio wrote:
Thanks, very clever!
_________________
Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
|
| Back to top |
|
|
GrahamNR17
Joined: 17 Jan 2009
Posts: 1855
Location: Norfolk, UK
Expire: 2012-09-06
|
| Posted: Sun Jul 05, 2009 2:55 pm Post subject: |
|
|
GrahamNR17 wrote:
I am going to try my hand at something similar, but a little more sophisticated. I followed what Jesito had to say on his site and followed the links to the instructions. Worth taking a look. |
|
| Back to top |
|
|
Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
|
| Posted: Sun Jul 05, 2009 5:12 pm Post subject: |
|
|
Attila wrote:
| GrahamNR17 wrote: |
| I am going to try my hand at something similar, but a little more sophisticated. I followed what Jesito had to say on his site and followed the links to the instructions. Worth taking a look. |
Smart thanks!
Where is the link GRaham ?
_________________
-------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
|
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10736
Location: California
Expire: 2025-04-11
|
| Posted: Sun Jul 05, 2009 6:00 pm Post subject: |
|
|
visualopsins wrote:
Excellent rawhead!
Just add a few inexpensive parts to extend range ( http://www.geocities.com/Yosemite/2131/shspeed.html )
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX-A ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
rawhead
Joined: 09 Feb 2009
Posts: 1525
Location: Boston, MA
Expire: 2014-04-29
|
| Posted: Mon Jul 06, 2009 5:56 am Post subject: |
|
|
rawhead wrote:
Oh, beautiful!! I knew there must be a smarter/more accurate way of doing this!!! Thanks!! 
_________________
Sony α7R, Pentax 67II, Kiev-60, Hasselblad 203FE, 903SWC, Graflex Norita 66, Mamiya M645 1000s, Burke & James 8x10, Graflex Pacemaker Speed Graphic (4x5 and 3x4), Century Graphic (2x3), R.B. Graflex Seried D, Rolleiflex SL66E, Rolleiflex 2.8C Xenotar, Mamiya C330f, a few M42, six P6, three OM, four Hasselblad, two Pentax 67, two Mamiya 645, one Noritar, and a sprinkle of EF. Oh, and an Aero Ektar and Leica Noctilux |
|
| Back to top |
|
|
rawhead
Joined: 09 Feb 2009
Posts: 1525
Location: Boston, MA
Expire: 2014-04-29
|
| Posted: Mon Jul 06, 2009 6:02 am Post subject: |
|
|
rawhead wrote:
The link given by siriusdogstar gave me another idea that might work, provided you have serious money to burn (obviously not for this alone 
Specifically, you can buy one of these Casio Exilims:
http://www.electronista.com/articles/09/01/07/casio.at.ces.2009/
and shoot video of your shutter, close up, with a light source on the other side. Count the number of frames w/ light, divide by 1,000, you got your shutter speed (x/1000s)
_________________
Sony α7R, Pentax 67II, Kiev-60, Hasselblad 203FE, 903SWC, Graflex Norita 66, Mamiya M645 1000s, Burke & James 8x10, Graflex Pacemaker Speed Graphic (4x5 and 3x4), Century Graphic (2x3), R.B. Graflex Seried D, Rolleiflex SL66E, Rolleiflex 2.8C Xenotar, Mamiya C330f, a few M42, six P6, three OM, four Hasselblad, two Pentax 67, two Mamiya 645, one Noritar, and a sprinkle of EF. Oh, and an Aero Ektar and Leica Noctilux |
|
| Back to top |
|
|
Jesito
Joined: 24 Aug 2007
Posts: 5745
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
|
| Posted: Mon Jul 06, 2009 2:01 pm Post subject: |
|
|
Jesito wrote:
| GrahamNR17 wrote: |
| I am going to try my hand at something similar, but a little more sophisticated. I followed what Jesito had to say on his site and followed the links to the instructions. Worth taking a look. |
Graham, are you referring to this thread?: http://forum.mflenses.com/the-shutter-speed-meter-project-t11387.html
Peterqd was able to build a better shaped one than my prototype, using the output to feed an audio editing program (I used Audacity).
More precise than the sheer audio one,
Regards,
Jes.
_________________
Jesito, Moderator 
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3 |
|
| Back to top |
|
|
GrahamNR17
Joined: 17 Jan 2009
Posts: 1855
Location: Norfolk, UK
Expire: 2012-09-06
|
| Posted: Mon Jul 06, 2009 6:35 pm Post subject: |
|
|
GrahamNR17 wrote:
| Jesito wrote: |
| GrahamNR17 wrote: |
| I am going to try my hand at something similar, but a little more sophisticated. I followed what Jesito had to say on his site and followed the links to the instructions. Worth taking a look. |
Graham, are you referring to this thread?: http://forum.mflenses.com/the-shutter-speed-meter-project-t11387.html
Peterqd was able to build a better shaped one than my prototype, using the output to feed an audio editing program (I used Audacity).
More precise than the sheer audio one,
Regards,
Jes. |
Yes, that was the thread. I'll give both a go, it looks like a great way to pass a Sunday afternoon |
|
| Back to top |
|
|
|
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
