After drooling over all the pictures that Paul and some of the others post with this incredible lens... I finally got a chance to buy one tonight thanks to an anonymous tipster (thank you again)! It's actually a bit out of my budget at the moment, but I couldn't resist the crazy deal. Looking forward to having it here and hopefully converting it soon. I must say, even with such a nice guide... I'm a bit nervous that I may screw something up.
Is it better to use a focus confirm adapter or just a plain one? I have a generic fleabay focus confirm chip for my CZJ 135mm, and it works very well. Will 1.2 be too much for the focus chip?
I have made mine with an AF confirm adaptor. Its not spot-on, but it helps a bit.
I am using it on a 30D, hoping for a 5D later this year, with a bigger and brighter view.
Thanks Leon will try it later.
best regards
AndersB
Sahid Limon wrote:
Is it better to use a focus confirm adapter or just a plain one? I have a generic fleabay focus confirm chip for my CZJ 135mm, and it works very well. Will 1.2 be too much for the focus chip?
I do not and will not use AF-confirm, but if you are going to try it, make sure to test the adapter/chip thoroughly with an M42 lens (preferably a fast 50, like a Super-Tak 1.4, or something) before you go mounting it on your Rokkor. Last thing you need is a crappy, inaccurate, inconsistent AF chip on such a great lens.
There we go. I right-clicked on the image over on the hosting page and clicked "copy link location" then pasted it here. (Though, that's the big version, of course)
Edited by cogitech on Sep 03, 2008 at 07:23 PM GMT
Ok, I just jumped on the bandwagon too ($275, from original owner), it hasn't arrived yet but should soon hopefully (mount also).
A few things I'd change from the original writeup:
Forget using an oversized drill bit for countersinking! That's just nuts, and the reason people are trashing the holes and ending up with only 2-3 holes usable. Spend the $10 for a proper countersink bit.
Some other ideas:
Clamp the 2 mounts together while drilling. Esp. if using a hand drill. That will help make things line up better.
Use a drill press if you have access to one.
Maybe drill the holes undersize and tap them, so the screws bite into both pieces, will add strength and mechanical improvement.
I plan to find allen-head screws to use rather than the original phillips - much better design, less likely to strip.
Mask the rear element with tape when filing/dremeling down the rear ring piece that surrounds the rear element.
I didn't have a problem with the countersinking. My first attempt only had 3 usable holes because of a slight alignment problem. The second adapter I drilled I was able to get all 4 holes lined up. I found the best way to line up was to use a marker with the mounts aligned, then use a center punch to create a dent for the bit to sit in.
cogitech wrote:
I do not and will not use AF-confirm, but if you are going to try it, make sure to test the adapter/chip thoroughly with an M42 lens (preferably a fast 50, like a Super-Tak 1.4, or something) before you go mounting it on your Rokkor. Last thing you need is a crappy, inaccurate, inconsistent AF chip on such a great lens.
I purchased an adapter before from Roxsen, and the build quality + the focus was pretty spot on (at least with both the CZ 135 and Takumar 50). It's not a necessity, I know... but it has helped me get more focused images compared to my non-chip adapter. I'm planning to get the same adapter and hopefully mount it on the new lens successfully.
