[shoplink 42483 ebay]
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This is a very rare image of a Sony A7r with an E-mount modified De Oude 50mm f/0,75 lens. More images can be seen on the [shoplink 42483 ebay]eBay auction of the lens (Click here)[/shoplink].
That said I think f/0,75 lenses are pretty unusable. It’s almost impossible to have a decent sharp image at that speed! I would be happy if Sony would give us some more f/1.4 FE primes instead.
23 Responses
The picture doesn’t show up on my browser (iPad Air, IOS 9 last version and Safari)
That would be completely useable. Just don’t use it under 10′. Phenomenal for video.
This is a fixed focus lens, ie the focus is fixed at about a foot. Considering the very limited back focus of the design, it is questionable whether infinity focus can be achieved at all.
“That said I think f/0,75 lenses are pretty unusable” – not true
FYI: this is a lens from an x-ray machine, with fixed aperture and fixed (and short: 1~2 m) focus. On FF, you only get a few cms in focus. Also, it is very-very soft. So yes, it’s an interesting project but otherwise pretty unusable for normal shooting.
I won’t say this speed is unusable, but this lens is a X-ray lens AFAIK. It’s very soft. Still, you can get some interesting photo with it. http://www.oldlens.com/delftrayxar50f075.html
Soft? I’d say: put some vaseline on any lens if you’d like such effects. It’s much cheaper.
I meant it’s not sharp at all.
I have a 50mm f1.2 and the DOF is 4 inches wide open. That means its almost impossible to nail focus. If a person moves at all they are out of focus. Focus era rate is very high, and its a FF lens. I always stop it down to F2.
With todays good high ISO to 6400 I see this as superfluous grandstanding
I have a 50/1.2 that has a DOF of just 1 inch! 😉
(Hint: DOF is sensor to subject distance depending)
DOF varies, even after the shot is taken.
Hint: Viewing magnification
This is a bizarre statement on more levels than I can imagine.
If you ever do portraits, a four inch depth of field is ENORMOUS. If you can’t nail focus in such a situation I am not sure you should ever grab a camera ever again. I have a 100mm F/2 lens on my FF Canon and, depending on subject distance, the depth of field can be significantly less than an inch.
It is well known that DoF is based on 3 parameters. Aperture, Focal Length and Distance.
Obviously if you move your subject far away you have plenty of DoF (assuming it’s a sharp lens)
that’s a full stop from f/1.0 ? isn’t it ? (and 2 stops from f/1.4)
A full stop faster would be f/0.7(1). But .75 is close enough for rock n roll, I guess..
Not quite. If you want it more accurate, 1:0,75 is about 0,83 EV steps higher than 1:1, and accordingly about 1,83 EV steps from 1:1,4.
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“The last flower shot is a copy off my LCD screen and as such, not easy to do. Since eBay has a 10 Meg file size limit, I am Not able to get that photo submitted to this ad. So i copy it off the camera screen to show the vignetting effect.”
– heh? 5 years spent for developing this unique, high-end super expensive adapter but no time to find out how to resize images?
“The common photographers buys AF lenses where all the thinking is done by a limited compromised optical designer, like Nikon or Canon or Sony. Thats why all digital photos have very similar characteristics, which is boring and NOT impressionistic- Understand?”
– how pathetic
It’s pathetic to shoot with this lens when large format gives shallower DOF and so much better IQ. It’s a lens for the n00bs.
Buy a 135/1.8 instead. Looks as large on the camera as this one, and is actually usable. It’s even got a larger front element (135%1.8 > 50%0.75).
There’s no way I’d bid on that lens and have confidence in it’s quality if the guy won’t bother with, or can’t figure out how to post actual photos taken with it.
Usually x ray lenses cover a lot and it’s strange for this not to cover ff
I wouldn’t say it wouldn’t be fun to have a lens like that, but I’d never pay that high a price for a lens whose back element I’d be afraid would fall if I’m not careful, that doesn’t cover full frame, that has a fixed aperture and can’t focus passed a pretty short distance. I find the price asked way too high for what it brings as a photo lens.
8 FE lenses which were supposed to be announced a month ago… I guess the announcement was in secret. 😉