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Having shot both the G28 and G21 on a modded A7s, they smeared about the same. In fact, I think the G21 behaves a bit better and it's definitely more manageable due to more DOF.SP if we are hoping for miracles I say please let the CG21 work as it is IMHO the best glass in the CG system as I have owned all of them except the 16mm
Depends on usage of course.It will not come close to the 645Z since the Z has larger photo sites which makes a 51MP FF 35mm camera not as good as the Z for most purposes. I am not talking about internet postings here of course as the print is my gauge of good or not so good.
I'm also hoping the 21 does well on the A7RII. My copy is a bit soft on the right side, but otherwise not too bad on the A7R. I've been using the Techart AF adapter, but it is bit buggy and I'll be looking for a better adapter for the A7RII.SP if we are hoping for miracles I say please let the CG21 work as it is IMHO the best glass in the CG system as I have owned all of them except the 16mm
From the Sony Store USA 8/5/15
Read Europe and Canada is claiming 7/28/15
Haven't heard much else.. The Sony Store one I paid the most attention to because that is where I ordered.
It will not come close to the 645Z since the Z has larger photo sites which makes a 51MP FF 35mm camera not as good as the Z for most purposes. I am not talking about internet postings here of course as the print is my gauge of good or not so good.
I have the 16mm F8 Hologon, the 21mm F2.8, the 28mm F2.8, the 45mm F2 and the 90mm F2.8. But I don't hold much hopes concerning their performance on the new A7rII : I think that the trick of the back lighted sensor is only there to compensate for the higher pixels count. I don't expect that it will significantly improve over what is already available.Having shot both the G28 and G21 on a modded A7s, they smeared about the same. In fact, I think the G21 behaves a bit better and it's definitely more manageable due to more DOF.
For now, I have very high hope for the A7RII to cope well with these lenses. There is a couple of test shots with the Hologon 16 on the new cam and I can't detect any real smearing. And we all know that lens is beyond hope on the previous gen.
Same for me : the 28mm produced so bad results on the A7r that I didn't bother to cut off the tabs of the 21mm. Though the picture Sho just showed above gives me thoughts.The last time I tried my 21cg was on the first Nex5 ant with my kip on adapter it would not even mount without cutting the tabs off( I saw shots taken by others with this glass and the tabs cut and the results were so poor I saw no need to even alter my 21 and kept it original and on my ContaxG2. The 28 above f5.6 worked ok on the original Nex5 and was horrible at any aperture on the NEX 7 so it went back in the Contax G2 kit.
The Hologon 16 rear element is still 4.5 mm away from the film/sensor plane, the rear guards might protrude an additional 1mm. The point is that you can mount a Hologon on any A7 body; however, you can't take pictures on most bodies due to the interference with the mechanical shutter. So far, only A7s users would be able to shoot with the Hologon safely in Silent full e-shutter mode.I have the 16mm F8 Hologon, the 21mm F2.8, the 28mm F2.8, the 45mm F2 and the 90mm F2.8. But I don't hold much hopes concerning their performance on the new A7rII : I think that the trick of the back lighted sensor is only there to compensate for the higher pixels count. I don't expect that it will significantly improve over what is already available.
Just curious however : the 16mm Hologon rear elements are protruding so much into the body that I don't think it can be modified to accommodate an FE body. Not only is the rear protruding way further than on the 21mm, but it isn't just plastic or metal : it contain a glass element. May be the pictures you saw using it weren't from the Contax G lens ? There is at least another Zeiss Hologon model for another mount than the Contax G. I'm just curious.. This lens has an incredibly low distortion.
Jim,scho, the 21cg sample above: is that a cropped view? Looks like a much narrower FOV than I am used to from that lens on slides. I can see the start of some color shift on the wood deck and trees in the corners and just wondered if you just cropped the smear and color shift off in your normal PP like I used to do with the 28cg and 35cg at times when shot more open.
I ended up using my 45cg and stitching with my NEX cameras to get wider FOV images without the wide angle CG lens issues. I actually ended up liking to stitch using Autopano Giga and horizontal and vertical stitching a shot.
No wonder you don't think it has much problem on your A7R. You can stop it from cropping by setting "APS-C Size Capture" to off. Then you might not be happy with your G21 .Jim,
I was using the older ("Eagle"version) of the DEO Tech adapter which is not 100% compatible with the A7R so it gives me 4800x3200 images instead of 7360x4912. Same aspect ratio, but reduced size and not cropped. Yes, there is some color shift that could be removed by converting to dng and applying a flat field profile in LR.
I agree that the 21 has problems on the A7R. Here is another shot I just tried with an old Fotodiox adapter in full size mode. More vignetting, magenta shift, and some edge smearing. The A7R in APS-C mode with the TechArt adapter gives an image (15 MP) about the same size as your 12.2 MP modded A7S.No wonder you don't think it has much problem on your A7R. You can stop it from cropping by setting "APS-C Size Capture" to off. Then you might not be happy with your G21 .
The last image with rainbows was taken with a Kipon on an A7S. No cropping, no "extra" vignette.You guys got me thinking.... Anyone know if the original Kipon contaxG to E mount adapter works on the a7x bodies without cropping issues??? It's been with me since my NEX 5 and has worked flawlessly on both 5 and 7 NEX bodies.
The problem is, with full FOV of a 21mm, this lens is currently unusable for landscape stuff even at f/16. Even on my modded cam, for full FOV, I have to use f/11 to get no smearing to the very tip of corners. If the A7RII somehow can solve this problem, I would be extremely happy. The G21 and G28 both have gorgeous rendition: a bit muted in contrast compared to modern Zeiss/Leica while being plenty sharp. Low optical distortion is a huge plus on my book as well.I agree that the 21 has problems on the A7R. Here is another shot I just tried with an old Fotodiox adapter in full size mode. More vignetting, magenta shift, and some edge smearing. The A7R in APS-C mode with the TechArt adapter gives an image (15 MP) about the same size as your 12.2 MP modded A7S.