Soldato
They do have a mount versions so they do have a bit of knowledge to work on them
The Sony A73/A7R3/A7S3/A9 Thread
- Thread starter traveyb
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Caporegime
My question is still valid, each are on a race, one needs to make on £5,000 body, one needs to make half a dozen £5,000+ lenses.
The crystal as for the large lenses can take up to 2 years to grow,they don't just appear over night these lenses
Soldato
I highly doubt canon mirror less camera will be ef mount but who knows. If it ain't then they are more behind the races then Sony as they will need to make lenses for it.
Why didn't canon make the 5d4 mirror less!
Soldato
Not sure if it was here or on another forum but apparently canon managed to make most of those tele lenses within the first year or so of ef mount being announced
Caporegime
Didn't they already make those lenses in FD mounts?
Excuse my bluntness, but that is total bull.
Canon don't use natural Fluorite to produce their Fluorite lenses because they're naturally forming and have fractures and other occlusions within the crystals.
Canon use a synthetic form, Calcium Fluoride. They powder it and then mix it with additional chemicals such as Zinc Fluoride to remove any oxygen. They then melt, cool and re-melt the mix multiple times until all air bubbles are removed. The result is cooled into a circular column and then individual rough blanks are cut from it.
Each piece is then ground via dies until it is progressively smoother and smoother.
Amazingly Canon finish a lot of their higher end elements by hand.
DPreview recently had some excellent articles on how Canon manufacture their lenses which can be found at
https://www.dpreview.com/interviews/4536277079/canon-lens-factory-interview
https://www.dpreview.com/articles/4...e-l-series-we-tour-canon-utsunomiya-factory/1
Five years to grow them.... yeah right...
Soldato
check this out.
https://www.dpreview.com/articles/6...n-match-or-beat-dslr-low-light-af-performance
its in relation to people saying the Sony A7 cameras cant focus in low light.
it can just as well as DSLR's
Soldato
SO how long dot grow them?
Point im making for sony is:
Are sonly really slow and churning out lenses or fast or on par with canikon when they first started there current Mount design?
Soldato
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These are conflicting results from DPReview against my own tests. According to my own experience of low-light AF:
- Sony A7 (Mark One) is nowhere near Canon 5D Mark III or Nikon D4 at dark venues;
- Nikon D810 is as good as Nikon D4s and obviously better than Canon 5D Mark III and 1DX (Mark One).
Soldato
They tested A7s and A7r2 in that article.
A9 will be far better then those two cameras. guaranteed.
Point is existing A7x cameras already focus good in low light but only requires you to have fast primes which as indicated in that article, most people will be using primes for low light work
Erm sorry don't understand the first sentence.
Are Sony really slow at developing lenses? It's a good question. They shouldn't be, since approximately 10 years ago they acquired Minolta, who had a lot of patents in Lens and Camera technology. Quite a few 'modern' lenses, if you dissect them, actually turn out to be fairly old optical designs, albeit with modern glass, anti reflection technology and motors to move the various elements around.
Sony are also in cahoots with Zeiss, who are excellent lens manufacturers and again, they've probably got lots of optical designs knocking around.
Someone may have already mentioned it, but if Sony are going to compete with Canon and Nikon, particularly in Sport and Wildlife Photography, they're going to have to produce 800mm, 600mm, 500mm, 400mm and 300mm prime lenses, that work natively out of the box.
I will give Sony kudos for trying to push new ideas with Sensors etc., but I really do think they need to look at the ergonomics of their Cameras as well.
Soldato
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Even if you trust the article you can see that they got the conclusion that A7s could focus at darker objects than A7R2, however for not-so-dark objects the A7R2 focuses quicker.
Similar things could happen for A9 as well - for a certain range of luminosity (e.g. -2.5EV ~ -3EV with an f/1.4 lens) A9 may focus quicker than DSLRs, but for other ranges of luminosity (e.g. -1EV ~ -2EV, -3EV ~ -4EV with an f/1.4 lens) A9 may focus slower than DSLRs.
Soldato
Caporegime
I just had an idea.
Canon already have the dual pixel focus tech which works amazing in Live View. All they really need is to develop a good hybrid EVF into the bodies, do a mirror lock up and implement electric shutter and do silent shooting.
Best of both worlds, the AF is already there, the body size can take the EVF.
20fps in electronic shutter, 14fps with mechanical shutter.
Optical and EVF, both through the lens. Don't need to change mount, don't need to change lenses.
Canon already have the dual pixel focus tech which works amazing in Live View. All they really need is to develop a good hybrid EVF into the bodies, do a mirror lock up and implement electric shutter and do silent shooting.
Best of both worlds, the AF is already there, the body size can take the EVF.
20fps in electronic shutter, 14fps with mechanical shutter.
Optical and EVF, both through the lens. Don't need to change mount, don't need to change lenses.
Soldato
That should have been the case for the 5d4 and 1dx2
Caporegime
They tend to do things slowly, like AF for the 5D2 to the 5D3 or the touch screen, and now the memory cards speeds but when they do implement it, it tends to hit the mark.
Can't have a through the lens optical viewfinder without a mirror.
But I agree with you in general. Full frame mirrorless with a short flange distance (for mounting a wider range of lenses) and a first party adapter for EF. Keep the size/ergonomics the same to balance out the weight of the lenses.
Actually all of this is what Leica have done with the SL but they're a boutique brand now.
Caporegime
I know you can't, I did say mirror lock up for electronic shutter...? Which implies there is a mirror for optical when the mirror is down and EVF when the mirror is up?
I don't even want them to change the flange distance, same body as now, same mount, same design and just wack in a hybrid EVF, do a firmware to enable electronic shutter. Job done.
My bad, misread what you wrote regarding MLU.
That is an interesting solution, especially once transparent LCDs start to get better - could integrate it into the focusing screen unit. The Fuji hybrid LCD relies on a mini LCD projecting the sensor feed into a square prism, but that's a tunnel OVF, so a transparent LCD would get around the need for a separate optical path for the LCD like Fuji does.
Another way would be to just have a smart port for a clip on EVF.
Or just don't bother with half measures and actually design an EVF only camera.