Category Archives: General topics

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Gentle cleaning of a camera? The shoe mud brush!


No, I am not joking. The 6d plus a Tamron 100-400 has fallen yesterday in mud. For now the mud hardened, and the best way to clean it, before opening the camera was to clean it approx 45 minutes (!) … Continue reading

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Recementing of the 28-70 foggy element


The Canon 28-70 F2.8 has a special problem: after a while, one of the duplets inside gets foggy. The problem is the cementing, a bad glue or process. After you disasseble the element, you can glue it with a UV … Continue reading

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What is the pickled cucumber good for…


…in the camera workshop?! Today I have to clean a Sigma 24-105 1:4 OS – inside/outside. (in fact, I hate Sigmas…). First problem: to disassemble the front lens, I have to screw out the plastic ring – which has no … Continue reading

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USM refurbishing


Cleaning of the optical encoder ring helps only the focus hunting cases.When the problem is with the usm ring, I refurbish them with degreasing, polishing both rings to get back the plane, shiny surfaces, then cleaning again, after which mounting … Continue reading

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Eastern Egg in a 17-85 IS


I had to replace the aperture cable – and I found the former one too, which the other service did not removed before mounting the new one. They dont like to disolder?!

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70d rotating LCD + 80D donor


I had to repair a faulty shutter in a 70d. (on the photo there is a mistake. It is a comparison between 40D and 70D curtain). As I did not have a new one, I searched for a good curtain … Continue reading

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Damaged screw


Case You have to screw out a bolt with damaged head (after forcing a stucked screw with the screwdriver can happen to damage the PH00 slot), You have 2 possibilities: to cut a simple straight slot with a small grinding … Continue reading

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Soldering irons: Weller and Fahrenheit


I need at least 2 soldering irons: a “normal size” for everyday use, and a tiny one, with the tip like a needle. A good Weller station is a lot of money, so i decided to use a Fahrenheit 28011 … Continue reading

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SD-card – not working


Case You have a 500d (or any other camera, using a SD-slot), can happen, that the camera does not feel the inserted card, or gets the false information, that the card is write-protected. The cause is in most of the … Continue reading

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Not starting DSLR – and the shorted motor


I had to repair an old 40d (but in this case could be ANY other Canon DSLR), which did not start at all. No message on the displays, nothing. After inserting the battery there was a very tiny “tick” noice … Continue reading

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