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Thread: Discovering Compur shutters

  1. #21

    Join Date
    Jul 2016
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    4,333

    Re: Discovering Compur shutters

    Quote Originally Posted by pchaplo View Post
    Good points about consistency and testing. Which shutter speed tester do you use? I see there is even a phone app!
    I use this one, $15 at ebay:

    Click image for larger version. 

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    It is a bare photocell intended to be connected to PC soundcard, but I connect it to an USB oscilloscope.

    There are photocell versions wired to be compatible with smartphones jack sockets, and there are $1 apps for it that also can work with shutter's noise, but with noise it is not accurate and has limitations.

    This standalone one is around $75 :

    Click image for larger version. 

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  2. #22

    Join Date
    Jul 2007
    Location
    near Seattle, WA
    Posts
    917

    Re: Discovering Compur shutters

    Quote Originally Posted by pchaplo View Post
    ...Who did you use for shutter service?
    I've always used Flutot's Camera Repair for servicing my Compurs and Synchro-Compurs. Carol is very good and easy to do business with.
    http://www.flutotscamerarepair.com/

  3. #23

    Join Date
    Feb 2015
    Location
    Dallas, Texas
    Posts
    328

    Re: Discovering Compur shutters

    Pere, Thannks. Is a USB oscilloscope a large traditional oscilliscope or is it smaller/affordable?


    Quote Originally Posted by Pere Casals View Post
    I use this one, $15 at ebay:

    Click image for larger version. 

Name:	s-l1600.jpg 
Views:	10 
Size:	51.4 KB 
ID:	173304

    It is a bare photocell intended to be connected to PC soundcard, but I connect it to an USB oscilloscope.

    There are photocell versions wired to be compatible with smartphones jack sockets, and there are $1 apps for it that also can work with shutter's noise, but with noise it is not accurate and has limitations.

    This standalone one is around $75 :

    Click image for larger version. 

Name:	s-l1600.jpg 
Views:	16 
Size:	47.8 KB 
ID:	173305
    Dallas Texas HABS / HAER / HALS Photography
    Photographer/Author Marfa Flights: Aerial Views of Big Bend Country (Texas A&M University Press)
    Petroleum Oil Pics

  4. #24

    Join Date
    Jul 2016
    Posts
    4,333

    Re: Discovering Compur shutters

    Quote Originally Posted by pchaplo View Post
    Pere, Thannks. Is a USB oscilloscope a large traditional oscilliscope or is it smaller/affordable?
    I use mostly a Picoscope 2205, Picoscope brand models range from under $100 to $25,000... I've other pro oscilloscopes but for most I use the 2205, it is always in my laptop bag, for my job it's enough as never checking signals with the scope over 20MHz. If the laptop runs on bateries then I avoid gounding issues.

    Today you can find new and cheap choices at Ebay, Hantek 6022BE 20MHz Digital Oscilloscope PC Based for $49. Also there are wifi oscilloscopes for smartphone:. 2CH 70MHz Hantek iDSO1070A

    A capable standalone oscilloscope can be $350, RIGOL Digital Oscilloscope 70MHz DS1072U 500MSa/s.

    Price depends on MHz (bandwith) , number of channels (you need one channel) , brand, software...

    For a shutter tester you only need the most basic capability.

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