Minolta AF 28-135 F4-4.5 / Infinity problem?

I´ve got the 28-135mm with the infinity problem, I´ve tried this and it worked BUT.

"...Now mount the lens on the camera set in manual focus mode, zoom to 135mm and turn the upper of the two rings until the camera registers focus on something at infinity. Making sure the lower ring is locked as far to the left as possible restick the tape so that the two rings are joined together again lining up the infinity symbol on the distance scale with the 135mm symbol on the zoom ring. Then put the collar back on and the screws back in. It's an easy job!"

I now got infinity focus even on 135mm!

Unfortunately i still have a problem; I can´t focus on anything between infinity and 2m between 100mm-135mm(it hunts like crazy.) What´s wrong? I´ve tried the above several times, but with the same result. There are now problems below 100mm.

Originally posted by Lahnet Sorry for the English :-) I have just bought a Minolta AF 28-135 F4-4.5 lens on eBay. When I use it on my Sony A100, it can not focus infinity between 100-135mm. There is no problems when i focus on closer objects, or between 28-100mm. The problem is the same on MF and AF.

This is a very common problem not only for the MinAF 28-135mm, but also for most other MinAF zooms of the first (beercan) generation. Even primes such as the 2.8/20mm and the 2/35mm usually are not REALLY focusing to infinity. I have corrected re-adjusted many of my MinAF lenses ...

Stephan

I have had simmilary problems with 28-135, what I bought for little money: I have tried to disamble and remove some internal shims for focusing to infinity, but then the lens can´t focuses right at 28mm between 3-6m, so I have tried all combination (2 or 3 shims, from my other 28-135 lens) but I wasn´t abble to setup correct focusing :(

http://artaphot.ch/lens-reviews/199-minolta-af-zoom-28-135mm-1422-45

I only just found out that my lens always thinks it's zoomed at 60mm, could that explain the AF issues? I disassembled the lens again and was wondering if my encoder is broken. I can see a couple of fingers that I think should slide on the encoder contacts. But only one of the five fingers is bend so that it could touch the contacts. The other fingers are 2 mm away. Should I try to bend these onto the contacts? It's all very fragile and not easy to reach.

Thanks