Teleconverter tape trick

Just don't expect focus to perform very well. It will be slower and in lower light situations or with low contrast subjects it may hunt a lot and even fail to achieve focus.

You'll have to find a website where someone illustrates which pins to tape up. I haven't done the tape trick myself All other Canon cameras, including 70D are "f5. The mm is f4. But some folks manage to make it work to a limited extent with a few small, carefully placed pieces of Scotch tape!

Note: There are a few third party lenses that are f6. Alan Myers San Jose, Calif. View solution in original post. The only thing I kept from those days was the 1. Amazing how equipment upgrades can solve an autofocus problem. None, I think. Some cameras can have one or some of their contact pins disabled and the camera will AF put tape over them. I don't know if this is true on a 70D. And I don't recommend doing it but you may search and find out for sure.

If it does work it will be very slow and not really all that accurate. Just MF it, like the good ole days! Okay, I've tried the tape trick. True, it's slower and less sharp than the normal AF without the TC. However, it gets you close enough to manual focus from there quickly. Basically tape the last left three pins of the converter. EXIF distance data will likely be lost for most lenses. You will find your answer at this link: Fred Miranda Tips Page.

Just place a small transparent piece of tape on the last 3 pins of the converter. The tape should be placed on the left hand side of the converter when looking at it from the lens connection side. As far as other consequences to taping the pins, I found a bit of information and some anecdotal data for you as well from here :.

You should be aware that the EXIF data will not be correct with regards to focal length, however. Another thing to be aware of is that these three pins obviously do a little more than that with some lenses. Whilst my is fine with a taped 1. It hunted like crazy and hardly ever achieved focus lock. Without the tape it was as quick to focus as far as I could tell as without the teleconverter.

The solution was to put the tape on the corresponding contacts on the back of the , now both lenses work just fine with the teleconverter. The Kenko teleconverters let you autofocus to F8.

Arthur Morris talks about using a 1. I've heard the 2. I've tried the pin taping. It wasn't something I wanted to have to rely on in a crunch. I have the Promaster Spectrum7 1. Even at f5. I'm assuming the TC has changed the focus of the Tokina that is now not being taken advantage of. I tried the Tape Method out of curiosity, and get an Error saying the Camera can not communicate with the lens, I get the same error when trying to use a T-Mount lens with the TC, but not without the TC in the mix.

Also tried using Live View, lens set to AI Servo, bright sunshine, and had the best luck of all capturing a well focused and exposed image. Sign up to join this community. The best answers are voted up and rise to the top. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser. Teleconverter AF modification. Thread starter davebmck Start date Dec 20, I have a Canon 1. Can anyone direct me to information on how to do that?

Quote from Canon 1. No damage will occur to the camera or teleconverter. Auto focus performance will not be quite as good as f5. USM in combination with a 1. I wanted this for my mm macro, but I sure want to try in on my mm as well. Just have to see how it works. Joined Sep 9, Messages 0 Reaction score 2, Click to expand Joves No longer a newbie, moving up!

Makes me wonder if there is a simular work around for Nikkors. Would be nice. SCguy said:. Garbz No longer a newbie, moving up! Joves said:.