l
Last edited:
Hmmm, I can't say I have seen this sort of behaviour. I have seen the contacts not seating correctly, or the lens not being recognized with a a hot swap but that is a general problem not a 4/3 to m43 adapter problem (ie I have seen it with m43 lenses too). I've used the 50-200 + TCs and 150 f2 + TCs a lot, but only with the Oly MMF-3.BTW, just got a reply from another 34 on EM1 shooter & have seen a few other reports. The adapter occasionally loses AF contact w/ the camera or lens. I've had this happen w/ my Oly MMF3 twice in last month. Have to wiggle camera to get contact back. Sent my 1st adapter, a Vello, back because it would not communicate w/ an EC14. Worked w/ the lens fine. Seems all the electrical contacts raises the risk of too much resistance.
Some users primarily of the 12-60 have reported failures of the SWD mechanism and it appears from an anecdotal perspective that using these lenses with CDAF seems to be contributing to these problems. The directly coupled SWD mechanism is designed to drive the lens very quickly to the focus point (a known distance with PDAF). They seem to be less robust with small back and forth motions.Can you explain what you mean by this statement?
Is this still an issue with the EM-1 using PDAF sensors on chip?Some users primarily of the 12-60 have reported failures of the SWD mechanism and it appears from an anecdotal perspective that using these lenses with CDAF seems to be contributing to these problems. The directly coupled SWD mechanism is designed to drive the lens very quickly to the focus point (a known distance with PDAF). They seem to be less robust with small back and forth motions.
This is very interesting. Oly M43 cameras do not have C-AF+MF but instead have pull back focus rings on pro oriented m43 lenses & mechanical focus on SWD lenses. But that means there has to be some way for the AF drive to disengage when the focus ring is used or the focus ring would fight w/ the AF system. Perhaps this is where failure occurs.Some users primarily of the 12-60 have reported failures of the SWD mechanism and it appears from an anecdotal perspective that using these lenses with CDAF seems to be contributing to these problems. The directly coupled SWD mechanism is designed to drive the lens very quickly to the focus point (a known distance with PDAF). They seem to be less robust with small back and forth motions.
If you are using the lens in S-AF mode I don't think so. If you are using it in C-AF I wonder (combo CDAF and PDAF)Is this still an issue with the EM-1 using PDAF sensors on chip?
I picked up the SWD version as I'd heard that the focussing was much quieter. In my Canon days I owned the well regarded non-IS Tamron 17-50mm but the noisy focussing drove me crazy! I find the SWD to be very quick to focus but on occasion it does hunt a bit.
Some users primarily of the 12-60 have reported failures of the SWD mechanism and it appears from an anecdotal perspective that using these lenses with CDAF seems to be contributing to these problems. The directly coupled SWD mechanism is designed to drive the lens very quickly to the focus point (a known distance with PDAF). They seem to be less robust with small back and forth motions.
Everything I've read says this only applies to bodies without PDAF; the E-M1 has PDAF.Is this still an issue with the EM-1 using PDAF sensors on chip?
There have been SWD failures with the E series bodies as well, using them with CDAF seems to make it worse.Everything I've read says this only applies to bodies without PDAF; the E-M1 has PDAF.
Barry
Exactly.There have been SWD failures with the E series bodies as well, using them with CDAF seems to make it worse.