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Equivalence theory

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Kilkry View Drop Down
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Post Options Post Options   Quote Kilkry Quote  Post ReplyReply Direct Link To This Post Posted: 11 January 2019 at 15:58
Originally posted by pegelli pegelli wrote:



Don't know about the UK but here the Touit 35/1.8 is 3.3 times more expensive than the FE50/1.8. So it's not a full apples-apples comparison taking into account the price (and resulting quality) of the lens. And if then they give "comparable" results at the equivalent aperture I don't think the 50/1.8 is such a bad deal quality wise vs. the Touit on an APS-C camera.


The Touit is very nice if you shoot wide open at mfd or stop down lots for landscape. A whole body portrait even at f/1,8 yields what I mentally referred to as "that Planar bokeh" and I see it in almost every whole body portrait shot taken with this lens.

As for this thread's main topic I can't parse it. It may be a side effect from trying to interpret stack traces all day, the toughest thing I'd like to read friday evening is the history of a micro-brew on a label.

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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 11 January 2019 at 16:40
Originally posted by pegelli pegelli wrote:

Originally posted by QuietOC QuietOC wrote:

It is easy to forget about equivalence. It is easy to get mislead by flat test targets and using the same exposure settings. I just bought another FE 50 F1.8 and was again a bit disappointed with its sharpness wide-open. It is certainly nowhere near as sharp as the Zeiss Touit 32 F1.8 for example. The inexpensive AF Rokinons are also not the sharpest lenses wide-open. And I am feeling--why did I spend $1000 on 2.34x larger sensor?

But the image from the Touit wide-open on the A6000 looks like stopping down the FE to F2.8 on the A7II--that's what I should compare. For similar images on the different formats the FE 50 F1.8 looks very good compared to the Touit--while also allowing up to 2.34x more light/shallower depth-of-field than the Touit allows on the smaller format.


Don't know about the UK but here the Touit 35/1.8 is 3.3 times more expensive than the FE50/1.8. So it's not a full apples-apples comparison taking into account the price (and resulting quality) of the lens. And if then they give "comparable" results at the equivalent aperture I don't think the 50/1.8 is such a bad deal quality wise vs. the Touit on an APS-C camera.

The Touit has come down in price quite a bit on the used market. I was trying 3x mm options on APS-C just before buying the A7II, and I offered $250 for this one, which is the same as the retail price of the FE 50 F1.8. There isn't much of a discount on used FE lenses.

I like the Touit a lot. The image quality is better than either Sony 35mm F1.8.

Edited by QuietOC - 11 January 2019 at 16:46
A68 30M 35 50 60M 16-50 16-80 18-55 18-70 18-135 55-200 55-300
A6000 LA-EA1 6.5 16 20 30 50 60 16-50 18-55 55-210
600si: 20 24 28 50 100M 135 24-85 24-105 28-105 35-70 35-105 70-210 75-300 100-200
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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: 11 January 2019 at 16:48
I've never seen 2nd hand Touits in shops over here, only Batis and Loxia, and I regularly see FE primes (28/2, 50/1.8, 55/1.8 and 85/1.8) usually for about 60-70% of the new price. So the market here seems quite different from the US.

Btw, I just looked up some prices on mpb.com (a reputable 2nd hand seller which works both sides of the ocean.

They had a Touit 32/1.8 for 349 $ and a FE50/1.8 for 140 UK pounds (which is roughly 180 $). So on an "apples-to-apples" (that's what equivalence is all about ) 2nd hand comparison the Touit is still almost double the cost of the FE50.

Edited by pegelli - 11 January 2019 at 17:03
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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