Official Sony A7 or A7r discussion thread

[ageha]

one major drawback of using RF lenses on the A7 is the minimum focusing distance for these type of lenses tend to be 0.7m and upwards. MFD is quite poor and hence magnification is poor for close up shots.

I ordered on ebay a leica M to nex adaptor with helicoid/extension tube functions that hopefully can shorten the focusing distance without too much impact on IQ

Why not using a SLR lens without adapter instead?

 

[Rashkae]

one major drawback of using RF lenses on the A7 is the minimum focusing distance for these type of lenses tend to be 0.7m and upwards. MFD is quite poor and hence magnification is poor for close up shots.

I ordered on ebay a leica M to nex adaptor with helicoid/extension tube functions that hopefully can shorten the focusing distance without too much impact on IQ

That's hardly an issue with the A7 though.

 

[ricleo]

Why not using a SLR lens without adapter instead?

Why ah. This is why lor. Size.

 

[ageha]

Why ah. This is why lor. Size.

Of course you know there are solutions inbetween. Nothing against that combo, I just think if you start using those corrective adapters why caring about IQ in the first place? Just as an example because you own already a Canon, a 6D and a small EF35/2 do the job as well, don't need an adapter, have AF and in practical use the small size and weight differences don't make any difference.

 

[ricleo]

Of course you know there are solutions inbetween. I just think if you start using those corrective adapters why caring about IQ in the first place? Just as an example because you own already a Canon, a 6D and a small EF35/2 do the job as well, don't need an adapter, have AF and in practical use the small size and weight differences don't make any difference.

hehe well these helicoid type convertors have no lens optics, so there shldnt be much issue with IQ and can be used as a normal leica m to nex adaptor, and can be turned to reduce focusing distance by quite a great deal and extends the usefulness of leica M mount lense.

so why not? good - great image quality in a compact body is what i am after. I will use the canon system with AF for things that cant be done by the A7, for travel, portraits, social gatherings i think the A7 is a very good full frame alternative to DSLRs, which in the past was limited to film or leica m

check out the review in case you haven't seen it before. relatively new news to me since i nvr explored RF lenses much before
http://jbhildebrand.com/2012/gear/hawks-factory-close-focus-adapter-review/

 

[Rashkae]

And there are Canon adapters with AF

 

[ricleo]

And there are Canon adapters with AF

Yup....not a very elegant solution in terms of size too... Something from the viltrox thread I posted. honestly this was what i considered. but the size savings isn't that great and even with AF... it is very slow

2- adaptor mounted

3- 16-35L - performance is actually very good. i think this is a viable UWA for the A7 for my use

4 - 40mm F2.8 - the only EF lens that seems like a right size on the NEX. An alternative to the sony 35 2.8 that covers full frame at a small size

 

[ricleo]

check out this gallery of A7R with RF lens tests. quite a range of CV, Leica and CZ lenses.

http://www.flickr.com/photos/inikon/sets/72157637668801615/

 

[pegasus21]

check out this gallery of A7R with RF lens tests. quite a range of CV, Leica and CZ lenses.

http://www.flickr.com/photos/inikon/sets/72157637668801615/page2/

Looks like the A7r really isn't the way to go for RF lenses with focal lengths less than 35mm.

 

[Rashkae]

Looks like the A7r really isn't the way to go for RF lenses with focal lengths less than 35mm.

Actually the corners still look nice and sharp.

 

[ricleo]

Actually the corners still look nice and sharp.

so you going for any one of these 2 bodies?

 

[pegasus21]

Actually the corners still look nice and sharp.

Not really. On the CV15, the edges are smeared. Especially wide open.

 

[Thoth]

Not really. On the CV15, the edges are smeared. Especially wide open.

Actually, the same goes for A7. I found my edges smeared.

 

[Rashkae]

so you going for any one of these 2 bodies?

Tempted to get the A7R but must wait long long to save $$$

 

[pegasus21]

Actually, the same goes for A7. I found my edges smeared.

Any samples?

 

[Rashkae]

Not really. On the CV15, the edges are smeared. Especially wide open.

Sure this is not a limit with the lens itself when shot wide open on FF?

 

[ricleo]

haaa i did closely examine the CV 15 images on my A7. yeah definitely some smearing at the edges at F4.5. didn't really test out at smaller apertures and that test should be done on landscapes or cityscapes as a subject instead of the TCC indoors.

i did not take pics of a suitably uniformed wall straight on to show off corner performance for the cv 15 on A7, but at least there is lesser purple on the corners. that said, our testing was done indoors. could well be that the purple may show up when shooting day landscapes even on the A7.

Actually, the same goes for A7. I found my edges smeared.

 

[pegasus21]

Sure this is not a limit with the lens itself when shot wide open on FF?

On film it's definitely not smeared just distorted due to the UWA so I'm guessing that this is a digital regression.

 

[Rashkae]

On film it's definitely not smeared just distorted due to the UWA so I'm guessing that this is a digital regression.

One man's distortion is another man's smear... will need to see proper tests

 

[Thoth]

haaa i did closely examine the CV 15 images on my A7. yeah definitely some smearing at the edges at F4.5. didn't really test out at smaller apertures and that test should be done on landscapes or cityscapes as a subject instead of the TCC indoors. i did not take pics of a suitably uniformed wall straight on to show off corner performance for the cv 15 on A7, but at least there is lesser purple on the corners. that said, our testing was done indoors. could well be that the purple may show up when shooting day landscapes even on the A7.

Possible assumption looking at d indoor shots.