I have tried a Viltrox EF-Nex II on A sony C3 and an A7 and found:
That the 4 AF lens I own that Auto focus are:
1 Canon EF 85mm 1:18 USM.
2 Canon EF 20-35mm 1:3.5-4.5 USM first released March 1993.
3 Canon EF 28-80mm 1:3.5-5/6 USM first released October 1991.
4 Tamron SP 70-300mm F/4-5.6 USD.
Only the prime seems to be listed on the amazon details. I wonder how many USM lenses do not work.
The focus speed is probably slightly slower than on my Full frame Canon, And if A7 or C3 would not focus well with standard lenses the viltrox also gets confused, I was in Chirk castle with a standard lens and tried to capture an image through old glass. The focus was not good. Later through a rain soaked window at home I found the A7/viltrox would hunt a bit.
So how fast is the focus? This is the focus speed sequence for the af lens above 1, 4, 3, 2. This would match a canon body. I guess they are all a bit slower than on the canon body. The weather has improved so I may be able to test outside a bit more, in decent light.
How tight does it fit? I hope it relaxes a bit with use it is a bit too tight at present, lens changing is slow.
Manual focus:
I have tried this with dandelion adapters and a few OM Zuiko lens. \"no free lunch with adapters\" I think these are OK at present, but testing them all will take a while.
I have found that the camera will not take photos with a, viltrox/dandelion/OM, lens sandwich after an overnight power off on. The second symptom is very fast camera start up. The solution is to power off dismount and remount the viltrox.
The mode dial on the camera can also lock out the shutter, if it is not in Aperture Priority or manual, with manual lens.
And the good news 70 UKP About 100USD. 25% of the leading one\'s price.
Aug 30, 2014 at 05:42 AM
Previous versions of Slalom's message #12548431 « Sony A7 and A7r Full Frame with Canon Lenses »
