i ended up picking up that one that someone posted from germany ebay. lens not in best condition but fromt he quick snaps i took, it seems fine image quality wise. havent loaded up on the PC yet though. didnt realize how small this zoom lens is, i thought it was bigger from the pics ive seen. in any case, it does take a bit of force to get it into the 'macro' mode. i have to hold the lens back cause it would dismount the lens fromt he adapter otherwise
since im having car troubles and needing money to fix, i might to end up selling the 24-85N and just keeping this one as my zoom lens .. ill try to do some quick tests but my tripod is mesed up so it wont be easy
Ouch!
I saw this posted before.
Luckily, I did not have to resort to this extreme for removal.
So, you can buy a new spring? Might as well get the two screws also...
From where?
rsolti13 wrote:
exactly right. I am actually on my 2nd 'leitaxed' 35-70. the first one I didn't realize there was glue on the spring and lets just say things got messy. I actually had to keep the old, bended spring hanging inside the lens and attach a new one Plus I scratched the hell out of the rear optic cover.
BUT....that certainly didn't affect the picture quality. Oh yeah, I also forgot to cover the optics when I was 'messing' around.
Seriously, never saw any impact to photos with that dust.
Any other 5DMkII users with this lens here?
I had a mirror hang, strike, however it is, last night messin' around.
What damage does that incur to the camera?
Any damage done to the lens when this happens?
Does this only happen during inifinty focusing? I wasn't paying close attention, so I forget how exactly it happened.
I am kind of hesitant to play w/ this lens any more on the 5DMkII.
I would very much like to hear from actual experiences.
I will have to start from the beginning of this thread and read it entirely, again.
buggz2k wrote:
Ouch!
I saw this posted before.
Luckily, I did not have to resort to this extreme for removal.
So, you can buy a new spring? Might as well get the two screws also...
From where?
I actually pulled the extra spring that was in the old contax mount that was removed and placed that one in there. That is the spring that is now attached and the old spring that is still hanging in there is just attached to the old screw....couldn't get it out. So there are two springs in the lens now, not just one.
buggz2k wrote:
Any other 5DMkII users with this lens here?
I had a mirror hang, strike, however it is, last night messin' around.
What damage does that incur to the camera?
Any damage done to the lens when this happens?
Does this only happen during inifinty focusing? I wasn't paying close attention, so I forget how exactly it happened.
I am kind of hesitant to play w/ this lens any more on the 5DMkII.
I would very much like to hear from actual experiences.
I will have to start from the beginning of this thread and read it entirely, again.
Anden is using it on 5D MkII...I don't recall him having any issues with the lens...
5D2 user here, never had any issue whatsoever. I have had interference with other lenses, it doesn't seem to do much damage if it is a once-in-a-while occurrence.
This material removal...
From the lens, or from the mount?
I have verified FLs, Macro, 35, and 70 exhibit the mirror stoppage problem on my 5DMkII.
Focusing distance doesn't seem to matter.
I have to power off the camera, disconnect the lens by a quarter turn or so, and then the mirror falls into place.
This a major bummer deal, I was hoping to have this lens as mostly always attached.
Sigh, now it is ONLY attached to the 40D...
Anden wrote:
I had issues and had to remove the curved protective bit and also file the top of the protective metal part. The mirror hangs in the upright position.
AhamB wrote:
Did you check the instructions on the leitax website? It does seem to be quite a hassle to install the Leitax mount...
Yes, that is the catch. with leitax conversion and chip, the adapter can cost $140 with current euro price. I am not sure what is current market pricing for C/Y 35-70 now.
I got bite by the lens lust crazy habit after reading this link http://robotbreeder.com/LensTests/2008/01/contax-35-70mm-f34-trounces-all-part-1.html
since I never tried with MF lens in stop down mode. I have mf lenses but all are AI-s which has no issue with D-200 body.
buggz2k wrote:
This material removal...
From the lens, or from the mount?
From the lens of course. The mirror couldn't possible hit the mount.
It's the "shroud" in which the rear element moves which you have to file a bit (at the top I guess), and you can unscrew that curved metal piece that's attached to it. When you have the adapter attached to the lens, you can easily see which part sticks out most into the mirror chamber and where the mirror could hit.
I didn't have any problems with the copy that I tried on my 5Dmk1, but I only had it for a short time. But I think that the mk1 has as least as much (if not more) mirror clearance problems as the mk2 on average.
So,
A mirror strike occurs when the mirror is raised, and strikes the lens mount?
And,
A mirror hang occurs when the mirror is released, and hangs on top of the mount?
On my 5DMkII and the C/Y 35-70 lens I definitely end up w/ mirror hangs.
But, how do I know it isn't striking also?
I guess it is also striking? I'm uncertain...
I have been toying with the idea of ordering a new mirror, and having it shaved.
Then replace the existing mirror w/ the shaved one.
Of course, this will mean the camera has to go to a shop that performs this type of work.
Anyone had this performed?
I haven't seen any mention of anyone having done that here. Just the suggestion of the idea.
If the mirror hangs on or strikes the lens when going up, a portion of the bottom of the image will be darkened (because the mirror was in the way while the shutter opened). If you don't get this, then the mirror probably only hangs when going down.
I don't know what exactly happens when the mirror is being raised and why it often only hangs when going down. Maybe the mechanism is more complicated than a simple hinge around which it rotates.
One thing to consider is that you may be focusing past infinity due to the thickness of the adapter. It is possible on at least some Contax lenses to adjust where the barrel stops rotating for infinity. If it goes too far, you may hit the mirror, but if you don't go far enough, while you may clear the mirror, you won't reach infinity. So I had one case where I adjusted the infinity exactly, and this happened to be just enough to clear the mirror. You'd have to do a search to see how it would be done for this particular lens, and I'm not sure if such a discussion exists. It was not difficult for the Contax 28/2.8 .
When you hit the mirror, the short term effect that I either noticed or imagined was that the microadjust calibration was thrown off for my lenses just a hair, and only temporarily (maybe a day or two?). I also think that the reason the mirror hangs one way and not the other is that going up is powered by a quick motor, while going down is probably enabled by just a small return spring. So the upshot being that when going up, it powers the mirror past an obstacle that normally would stop it if only a mild force were applied, but given the larger force, the mirror mechanism is forced backwards somewhat as the mirror scrapes by, probably knocking the alignment out temporarily until all the plastics and metal eventually flex back to their neutral state a day or so later. That may all be my imagination, but that's what I've noticed (mainly noticed while trying to get consistent microcalibration over many lenses, one being an alt that hit the mirror, and what I kept getting was inconsistency).
If I had the problem, and I knew how to easily adjust the infinity stop, that's where I'd begin, before hacking at the lens or mirror. This is not suggested much if ever here, so I thought I'd toss it out.
With the Contax 35-70 there is no easy way to adjust infinity as with lenses that move the complete lens group as a whole, since the rear element does not move during focussing, but it does move when zooming. Thus, adjusting infinity should only be done by choosing the correct adapter thickness.
Since the rear element moves forward from 35mm, you could just refrain from using the very widest end of the zoom and you should be safe from mirror issues.
.. ill try to do some quick tests but my tripod is mesed up so it wont be easy 