p.57 #1 · Sony A7 and A7r Full Frame with Canon Lenses
alundeb wrote:
I am curious about how the Canon 24-70 F4 IS hasn't shown its worth. The known flaw is center softness at 50 mm, even stopped down. Apart from that, it is a much better lens than the 24-105 for resolution acrros the frame, CA, and distortion.
I am more curious as to exactly where it has a centre resolution softness at 50 mm; it must be at that exact FL because Photozone doesn't seem to mention it:
Something very strange must be happening between 40 mm and 70 mm.
p.57 #2 · Sony A7 and A7r Full Frame with Canon Lenses
Glenn NK wrote:
I am more curious as to exactly where it has a centre resolution softness at 50 mm; it must be at that exact FL because Photozone doesn't seem to mention it:
Something very strange must be happening between 40 mm and 70 mm.
Maybe someone else can show me, because I can't seem to find it.
actually that is the case, as it goes above 40mm and nears 50mm it gets worse and then as it goes above 50mm and gets towards 60mm it gets better again, it's more noticeable away from the center and it's most noticable like 50mm +/-5mm or so, for whatever reason.
p.57 #5 · Sony A7 and A7r Full Frame with Canon Lenses
artd wrote:
[Also, I guess we should point out Sony does make a pretty good 1.5x teleconverter for their FF lenses...it's called a NEX
I already use the NEX-7 as a teleconverter for my D800E
It isn't quite the same though. The Full Well Capacity of the NEX-7 pixels is only 25000 e- compared to the D800E's 45000 e-. And the D800E has 36M of those.
p.57 #8 · Sony A7 and A7r Full Frame with Canon Lenses
Rickuz wrote:
Beautiful Sensoji! My favorite part of Asakusa.
Did you shoot shoot RAW? Did you push the shadows?
Thanks! As a local, Senso-ji during the daytime is our least favourite part of Asakusa (because of too many tourists) but Senso-ji at night is our favourite part of Asakusa.
Yes it was shot RAW. No shadow pushing. Just a bit of highlight recovery and white balance correction.
p.57 #10 · Sony A7 and A7r Full Frame with Canon Lenses
KiboOst wrote:
Ah many thanks Fred !
I've also emailed metabones for that, will post any info here for interested people.
Actually, if you plan to use TS-E lenses like the 17mm, the RSS "BFT1-L" L-bracket will not work. It blocks the dials and obstruct the lens from shifting down. It should work OK for non-TS-E lenses though.
Fred
p.57 #12 · Sony A7 and A7r Full Frame with Canon Lenses
Thanks very much tororo! Your shots will give a lot of encouragement to those contemplating the body. Canon lenses are shining on this body! Thankfully there are no nasty surprises as rangefinder shooters are uncovering.
p.57 #13 · Sony A7 and A7r Full Frame with Canon Lenses
SKumar25 wrote:
Thanks very much tororo! Your shots will give a lot of encouragement to those contemplating the body. Canon lenses are shining on this body! Thankfully there are no nasty surprises as rangefinder shooters are uncovering.
My pleasure. I also had a bit of concern about ultra wide SLR lenses on A7r prior to purchase. But now I'm almost certain that there is no problem with any SLR lenses. Canon lenses do shine on A7r via Metabones, not only the L lenses but also some consumer lenses do well. You cannot deny that some lenses like 28/1.8 cannot keep up with the resolution of 36MP, while lenses like 15/2.8, 85/1.8 still do very well on A7r even though they are old design lenses.
p.57 #14 · Sony A7 and A7r Full Frame with Canon Lenses
Glenn NK wrote:
Thanks for the information.
This is really surprising - I have a few zooms and never noticed a drop in resolution except at the ends of the FL's.
It almost makes one wonder if it was missed during the design? There are very many compromises in any lens design, and particularly so in a zoom lens.
Glenn
I think nothing was missed in the design. I think they noticed that many users tend to live near either end of the zoom so why not optimize for the ends instead of the middle or a sliding quality scale that either starts well wide and fades to long or starts well long and fades to wide. People were tired of the OK long and fades to wide and OK middle and fades at either end of the old desings, was my impression. So now they give you the magicaly edge to edge 24mm performance on a FF and they also make it do pretty well at 70mm, sounds like a heck of a win to me over the 24-105, I stink at 24mm and 105mm or the other I stink near 24mm standard zooms.
50mm is a bit boring focal length on FF, arguably and it is also the one place where you can get amazing FF image quality in a VERY small/compact/low-priced package (with say the 50mm 1.8) so why not, if you must pick a weak point, make it be right at 50mm? It seems genius to me.
p.57 #15 · Sony A7 and A7r Full Frame with Canon Lenses
skibum5 wrote:
I think nothing was missed in the design. I think they noticed that many users tend to live near either end of the zoom so why not optimize for the ends instead of the middle or a sliding quality scale that either starts well wide and fades to long or starts well long and fades to wide. People were tired of the OK long and fades to wide and OK middle and fades at either end of the old desings, was my impression. So now they give you the magicaly edge to edge 24mm performance on a FF and they also make it do pretty well at 70mm, sounds like a heck of a win to me over the 24-105, I stink at 24mm and 105mm or the other I stink near 24mm standard zooms.
50mm is a bit boring focal length on FF, arguably and it is also the one place where you can get amazing FF image quality in a VERY small/compact/low-priced package (with say the 50mm 1.8) so why not, if you must pick a weak point, make it be right at 50mm? It seems genius to me. ...Show more →
Naw. Genius is to make it pin sharp across the entire range. What you got is a compromise.
p.57 #16 · Sony A7 and A7r Full Frame with Canon Lenses
skibum5 wrote:
50mm is a bit boring focal length on FF, arguably and it is also the one place where you can get amazing FF image quality in a VERY small/compact/low-priced package (with say the 50mm 1.8) so why not, if you must pick a weak point, make it be right at 50mm? It seems genius to me.
Nothing boring about the 50mm FL or any other FL for that matter. It is what you make of it, be it 24mm, 50mm or 70mm. Anyway for the price the 24-70L IS costs with rebates and discounts, you can get the Sony Zeiss 24-70 f/4 OSS, so why not put a native lens on the Sony and get real AF and excellent IQ?
p.57 #17 · Sony A7 and A7r Full Frame with Canon Lenses
German Chip Foto Video Magazin came to the same conclusion as DXO and rated the A7R to have the best picture quality of all full frame cameras. It is therefore their new picture quality reference.
