I have used Field Co indicators on my R8 and EF and RF lenses. Since I added a few RF lenses to my inventory I needed indicators. Though two indicators would be sufficient at the moment, I made a future investment since it is more cost efficient.
Now to the indicators. They are thick and robust. Though they are very precisely cut, they were difficult to remove from their sheats. But, as I said, they are robust and were not damaged during my struggle. The application is good too. If you misplace the sticker, it can be removed and repositioned. I did it twice. When I am satisfied with the position, I hardly pressed on it and it sticked well. I am sure it can be peeled off when I want to but I don't think it will loosen by itself. My previous stickers didn't loosen up.
I only see one downside to these indicators. Actually, it's mostly due to Canon's inconsistency. The rear cap indicators all tailored to the lenses. However, the front cap stickers are in standard size. Regarding indicators that's good as the font sizes all remain the same. But Canon uses different sized texts on different lens caps (For example, Canon logo on 50mm prime is smaller than 100mm macro) and new front cap designs leaves less room above and below the Canon logo. So, in a 50mm lens, I couldn't find enough empty space and put the sticker on Canon logo. The sticker covered the logo completely. I have no problem with that. But I like consistency. So, though my 100mm macro lens had enough empty space, I put the sticker on Canon logo also and it fit perfectly. Then I grabbed my 24-105 lens. I realized that Canon logo was much bigger and the indicator was not able to cover the whole logo. So, I sitcked it on the emty space below the logo. All sticked perfectly, but due to Canon's inconsistency, the front stickers are not in standard places. That's my only gripe for these indicators and it's mostly due to Canon.
The last but not least, I am impressed with communication by Vivian. She immediately responded to all my mails and also followed up if I was satisfied with the indicators. So they are completely backing their products and eager to resolve any issues.
