iiiNelson
Well-known member
Everything except that it isn't great for IR due to hotspots. Great and quick as an autofocus lens for stills and video. Sharp across the frame. Focuses as close as 8 inches. Wide aperture.
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A7r, A7r2 - and why I'm keeping both ...
- Thread starter k-hawinkler
- Start date
Knorp
Well-known member
Yes, I do remember those curved rays: found them rather amusing ...
But got to agree those ring flares are worrying.
I've set my hopes on the A20/1.4 - to be delivered anytime soon to my doorstep - this year hopefully ... :banghead:
k-hawinkler
Well-known member
Thanks Bart. Which lens is that A20/1.4?Yes, I do remember those curved rays: found them rather amusing ...
But got to agree those ring flares are worrying.
I've set my hopes on the A20/1.4 - to be delivered anytime soon to my doorstep - this year hopefully ... :banghead:
Following are measurements by Jim Kasson on the FE 12-24/4:
Sony 12-24/4 on a7RII at 18 mm
Sony 12-24/4 on a7RII at 12 & 24 mm
Sony 12-24/4 on a7RII — distortion
Sony 12-24/4 FE on Sony a7RII — corner color casting
Sony 12-24, Batis 18, & WATE on a7RII
http://blog.kasson.com/the-last-word/sony-12-24-f4-fe-on-a7rii-flare/ Sony 12-24 f/4 FE on a7RII — flare
http://blog.kasson.com/the-last-word/sony-12-24-f4-fe-on-a7rii-more-flare/ Sony 12-24 f/4 FE on a7RII — more flare
http://blog.kasson.com/the-last-word/sony-12-24-f4-oof-psfs/ Sony 12-24 f/4 OOF PSFs
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Knorp
Well-known member
Oops! It's the Sigma ART 20mm f/1.4 (EF mount), should make for a fine combo together with my A135/1.8 ... :grin:
k-hawinkler
Well-known member
9 • http://blog.kasson.com/the-last-word/sony-12-24-loca-focus-shift-at-18-24-mm/ Sony 12-24 LoCA & focus shift at 18 & 24 mm
iiiNelson
Well-known member
I'm curious as to how much of an issue focus shift actually becomes for autofocus lenses on an autofocus camera... I understood the ramifications on a rangefinder system such as a Zeiss Ikon or Leica M (or any non-TTL focusing system) but isn't it easy to half press the shutter or back button focus after recompose? Seems like this part of a review become talking points for conjecture so that people don't buy a said lens...
k-hawinkler
Well-known member
Tre, I may be mistaken. But wasn't there quite a discussion that these cameras had a problem focusing stopped way down.
The solution was to focus fast lenses, say at f/2, then automatically stopping down to the intended f-number.
For this kind of situation focus shift matters, mainly for fast lenses.
I think Sony had some fast lenses focusing stopped down that didn't work too well in low light.
The solution was to focus fast lenses, say at f/2, then automatically stopping down to the intended f-number.
For this kind of situation focus shift matters, mainly for fast lenses.
I think Sony had some fast lenses focusing stopped down that didn't work too well in low light.
iiiNelson
Well-known member
That may be... If so I missed the discussion. I guess the next question is if focus assist would help any.
k-hawinkler
Well-known member
Camp May - Los Alamos County, NM
Sony ILCE-9 + Voigtländer 10mm/F5.6 Hyper Wide Heliar @ ISO 100, f/9, 1/40s
Same location, shot with DJI Mavic Pro. The spellchecker insists on Magic Pro. It has a point!
DJI FC220, ISO 100, FOCAL LENGTH 4.7 mm (26.0 mm in 35mm), APERTURE f/2.2, EXPOSURE TIME0.00104s (1/965)
Sony ILCE-9 + Voigtländer 10mm/F5.6 Hyper Wide Heliar @ ISO 100, f/9, 1/40s
Same location, shot with DJI Mavic Pro. The spellchecker insists on Magic Pro. It has a point!
DJI FC220, ISO 100, FOCAL LENGTH 4.7 mm (26.0 mm in 35mm), APERTURE f/2.2, EXPOSURE TIME0.00104s (1/965)
Knorp
Well-known member
On ground level it looks okay-ish, but from the air ... :shocked:
k-hawinkler
Well-known member
Thanks Bart. Well that's nature for you.
After a decade of drought the beetles finish off the dying or dead trees.
Also, this area is surrounded by about a quarter million acres, devastated by forest fires.
It will take about 150 years to get the forest splendor back. :watch:
One more from the Mavic Pro.
BTW, up here folks have bear bells and pepper spray, in prime black bear and cougar country. I am sure some folks carry guns. You can in the National Forests, but not in the National Monuments or Parks.
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Knorp
Well-known member
From my 'Karl May' period I recall black bears were just some kind of large teddy bears.
It were the grizzlies that were highly valued for their fangs, nails and indeed the claws for eating and you had to fight them with a knife.
But hey - all campfire stories made-up by some writer ...
k-hawinkler
Well-known member
Thanks Tre. A friend of mine in Los Alamos has a video camera monitoring what happens outside his front door. Well on 2017.06.27 around 8 PM his video shows a single bear walking right by his front door. Obviously the bear had the neighborhood exited. :grin:
k-hawinkler
Well-known member
Ah 'Karl May'. He certainly had a vivid imagination.From my 'Karl May' period I recall black bears were just some kind of large teddy bears.
It were the grizzlies that were highly valued for their fangs, nails and indeed the claws for eating and you had to fight them with a knife.
But hey - all campfire stories made-up by some writer ...
Bart, how many of his books did you read?
I must have read somewhere between 20 and 30.
Checked out most of them from the village library.
Did you read his books in German or Dutch or another language?
I think over here in the States he is pretty much unknown.
k-hawinkler
Well-known member
Some time ago I tried to figure out whether my FE 90/2.8 lens on A7rII was any good.
So I shot the screen door at different apertures. :grin:
The image sequence looked kind of cute to me when flipping through it, one image on top of another. Here it is.
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22
So I shot the screen door at different apertures. :grin:
The image sequence looked kind of cute to me when flipping through it, one image on top of another. Here it is.
f/2.8
f/4
f/5.6
f/8
f/11
f/16
f/22
Knorp
Well-known member
Read the complete Winnetou and Old Shatterhand series but for 'the death of Winnetou'. I guess I didn't like the ring of that title at all ...
And also a few titles of the Kara Ben Nemsi series.
As I was just Bartje (little Bart) then, it was all Dutch to me ... :loco:
k-hawinkler
Well-known member
Thanks Bart. Yup, those were the essentials.Read the complete Winnetou and Old Shatterhand series but for 'the death of Winnetou'. I guess I didn't like the ring of that title at all ...
And also a few titles of the Kara Ben Nemsi series.
As I was just Bartje (little Bart) then, it was all Dutch to me ... :loco:
With the Kara Ben Nemsi character of course also goes the Hadschi Halef Omar Ben Hadschi Abul Abbas Ibn Hadschi Dawud al Gossarah guy.
Karl May was certainly full of stereotypes. :facesmack:
k-hawinkler
Well-known member
A double rainbow over our backyard, shot by my wife a couple days ago.
Sony ILCE-9 + Voigtländer 10mm/F5.6 Hyper Wide Heliar @ ISO 160, f/7.1, 1/30s.
Sony ILCE-9 + Voigtländer 10mm/F5.6 Hyper Wide Heliar @ ISO 160, f/7.1, 1/30s.
k-hawinkler
Well-known member
A9 + Batis 25/2 FE