Great video - I wish I had your expertise, I do some camera repairing and hope to make (or find) a shutter tester someday. I wish you'd make some longer videos on some of your projects someday, I'd love to see video where you show the whole process of making one of your stereo cameras, film scanners or shutter tester.
In my Arduino shutter tester is a phototransistor from Osram. I built it myself but someone else wrote the code for me. I can not remember the type of phototransistor exactly. It measures beyond 1/1000 of a second and seems to be pretty accurate. Another interesting thing is that the square photodiode from Osram put out a fair amount of current when light falls on it, a few of them can be used to replace selenium cells. I may have some of these original Pentacon photoresistors in my box of Praktica B parts.
The big four photodiodes (not photoresistos!) you can see on the Pentacon-pickup (type SP105) are not for shutter time measurement but exposure value measurement. The row of three phototransistors for time measurement are in the center.
Great experiment! can't wait to see the results you will have with faster photodiodes That freq. counter you have reminds me one I built abt 80-90 :) is the ELV isn't?
Great video - I wish I had your expertise, I do some camera repairing and hope to make (or find) a shutter tester someday. I wish you'd make some longer videos on some of your projects someday, I'd love to see video where you show the whole process of making one of your stereo cameras, film scanners or shutter tester.
In my Arduino shutter tester is a phototransistor from Osram. I built it myself but someone else wrote the code for me. I can not remember the type of phototransistor exactly. It measures beyond 1/1000 of a second and seems to be pretty accurate. Another interesting thing is that the square photodiode from Osram put out a fair amount of current when light falls on it, a few of them can be used to replace selenium cells.
I may have some of these original Pentacon photoresistors in my box of Praktica B parts.
The big four photodiodes (not photoresistos!) you can see on the Pentacon-pickup (type SP105) are not for shutter time measurement but exposure value measurement. The row of three phototransistors for time measurement are in the center.
Great experiment! can't wait to see the results you will have with faster photodiodes
That freq. counter you have reminds me one I built abt 80-90 :) is the ELV isn't?
Thank you. What do you mean ELV?
@@variopancolar6487 ELV is a publisher and electronic kits seller very popular in Germany, I thought that freq. counter is one of their kits.