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Sony 200-600 announced

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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 15 June 2019 at 20:02
It is a bit confusing there are two threads about these lenses....
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theadamrice View Drop Down
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Post Options Post Options   Quote theadamrice Quote  Post ReplyReply Direct Link To This Post Posted: 15 June 2019 at 20:12
Originally posted by Miranda F Miranda F wrote:

Originally posted by theadamrice theadamrice wrote:

Its more were just trying to move all of our A mount gear. I wish I were that connected lol. We will list our A99iis and our 500 F4 once we get back from our Alaska trip in a couple weeks.

If your A-mount gear works for you, why are you moving it on?


Weve been planning to move to E mount for awhile the long fast glass just wasnt there yet. This winter Sony Pro Services sent us a A9 and a 100-400 to try. We were shooting barn owls so almost all birds in flight stuff. That was all it took to convince us it was time. Not that will be the case for everyone. We just love how light everything is.
A77II X2, A99ii X2, KM 17-35, Sony 24-105, Zeiss 24-70 2.8, Mino 50 1.7, Sony 70-400 GII, Sony 300 2.8, Sony 500 F4 G, Mino 600 F4 HS G Sony A9, Sony 100-400
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Post Options Post Options   Quote skm.sa100 Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 09:05
My question will reveal that I don't understand the engineering of the mount much: if they can release a 200-600 in E mount, why no A mount as well? All the optics will remain the same and they just need to replace the electronics, right?
Or is it a business decision rather and engineering one?
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nandbytes View Drop Down
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Post Options Post Options   Quote nandbytes Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 09:10
Originally posted by skm.sa100 skm.sa100 wrote:

My question will reveal that I don't understand the engineering of the mount much: if they can release a 200-600 in E mount, why no A mount as well? All the optics will remain the same and they just need to replace the electronics, right?
Or is it a business decision rather and engineering one?


A-mount has a larger flance distance than e-mount. So they'd need redesign the lens optically work with the larger flange distance (i.e. the distance between the sensor plane and the rear of the lens)
This is the reason you can easily adapt to a-mount lenses to e-mount (because you can just add a tube to make up for the extra flange distance) but not the other way round.
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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 09:14
Originally posted by nandbytes nandbytes wrote:

Originally posted by skm.sa100 skm.sa100 wrote:

My question will reveal that I don't understand the engineering of the mount much: if they can release a 200-600 in E mount, why no A mount as well? All the optics will remain the same and they just need to replace the electronics, right?
Or is it a business decision rather and engineering one?


A-mount has a larger flance distance than e-mount. So they'd need redesign the lens optically work with the larger flange distance (i.e. the distance between the sensor plane and the rear of the lens)


Fully agree Anand, it really needs a new optical design because from the drawings I have seen the rear optical element would be interfering with the mirror of an A-mount camera. If the rear part of the lens was "empty" they could just move mount further forward with only a new mechanical design, but that isn't the case here.

Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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SnowFella View Drop Down
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Post Options Post Options   Quote SnowFella Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 10:20
Quite simple, no lens designed for E-mount will ever work on A-mount without a re-design or some sort of stupid adapter with lots of glass inside it.
Makes you wonder, when was the last time Sony made a new (not a G2) lens for A-mount? Better part of a decade and a half ago with the 50mm planar?
 



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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 10:49
Originally posted by SnowFella SnowFella wrote:

Quite simple, no lens designed for E-mount will ever work on A-mount without a re-design or some sort of stupid adapter with lots of glass inside it.
I don't know if they exist, but E-mount lenses where the rear glass element is ~26 mm or more from the mount could teoretically be made for A-mount without changing the optical design.

Unlikely, but not impossible.
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 13:04
Originally posted by SnowFella SnowFella wrote:

...Makes you wonder, when was the last time Sony made a new (not a G2) lens for A-mount? Better part of a decade and a half ago with the 50mm planar?


2012 with the 500/f4
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 17 June 2019 at 13:53
In theory a telephoto lens with a stationary rear group can be made to focus on a mount with a different registration distance, if you alter the range of movement of the focusing groups. In practice, the only lenses I've been able to do this with are mirror lenses where the optical path is folded and the front focussing group travel is enough to allow close focus.
For example, the Kenko 400mm mirror lens is designed for DSLRs and will fit A-mount (and obviously E mount with a long adaptor), but it is possible to fit the lens directly to an E-mount camera with a very short mount. In this case, you lose some of the close focus capability but it will still reach infinity.
Doing it the opposite way (an e-mount lens on A mount) you would lose infinity unless the focusing group can be repositioned to regain it, but since most (desirable) E-mount teles have internal focus and an awful lot of elements, I wouldn't expect this to be practicable and you'd probably ruin the performance ... ...
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
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Post Options Post Options   Quote dxqcanada Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2019 at 22:12
I am amazed Gustav has not added his opinion here yet.
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mambo View Drop Down
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Post Options Post Options   Quote mambo Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2019 at 22:30
Originally posted by dxqcanada dxqcanada wrote:

I am amazed Gustav has not added his opinion here yet.


I do not think he has visited or posted here on dyxum recently
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Post Options Post Options   Quote BUNS Quote  Post ReplyReply Direct Link To This Post Posted: 24 June 2019 at 22:33
A700 and grip,5D,BEERCANS,SIGMA 17-70,SONY 50 F:1.8,TAMRON 17-50and 90mm macro.COSINA 100,SIGMA 10-20 f4-5.6,70-400G, 77ii,A7iii,Tamron 28-75
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Jozioau View Drop Down
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Post Options Post Options   Quote Jozioau Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2019 at 00:25
Originally posted by BUNS BUNS wrote:

GUSTAV


Just looked at the link, and those images are very impressive.
Gustav (@ijsvogel) seems not to have posted anything in Dyxum for over two years.
Pity, as he is a Sony Ambassador, specialist wildlife photographer, and has treated us to some absolutely stunning images of birds and animals in nature, often taken from inside of one of his hides where he waits very patiently for just the right moment.

Hopefully he might return one day?

If anyone's wanting to see a sampler his photos on his website, here's a link https://500px.com/gjkiburg
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SnowFella View Drop Down
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Post Options Post Options   Quote SnowFella Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2019 at 05:17
What I gather is the same shots but also with some back and forth talking about the lens.
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