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10-10-2009, 02:35 PM   #1
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Guess the lens - 1.4 and 1.7 50 vs 16-50

So with my recent purchase of an used 16-50 I wanted to see how it compares to my 2 fifties: the SMC 1.4/50 and the F 1.7/50.

So I ran a sharpness test at minimum focus distance and f/2.8 for all lenses (at f/2 the 16-50 would lose big time). The 16-50 was around 0.4m because it is slightly shorter than 50mm.

Make your guess which lens belongs to which picture.
(I was too lazy to rescale them so I just uploaded them in full size)



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Last edited by Egg Salad; 10-10-2009 at 06:44 PM.
10-10-2009, 04:15 PM   #2
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I'm guessing the second one is the F 1.7/50 and the third one is the SMC 1.4/50 and the first one is the 16-50. How did I do?
10-10-2009, 05:02 PM   #3
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I think the 3rd one is much different compared to the other previous two. my guess that that would be the 1.7 since it's brighter and with a much clearer image. one more thing I noticed is that the other two seems to manifest a smaller or farther image.

those are two seem to be pretty close but the first one is a bit blurry as compared to the 2nd one. since the 1.4 is almost as clear as the 1.7 stopped down at 2.8 so my guess is that the 1st blurry one is the zoom lens.
10-10-2009, 06:37 PM   #4
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I won't dissolve it yet. Maybe there are some more guesses coming.

And yes the third one is different but not due to the lens but the lighting conditions - this one was taken one day after the first two - hence the slightly different WB and angle.

Focus distance was the same for both fifties.


Last edited by Egg Salad; 10-10-2009 at 06:50 PM.
10-10-2009, 06:56 PM   #5
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I'm going to guess that they are in the same order as the thread title: 1.4, 1.7, 16-50
10-10-2009, 07:14 PM   #6
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The first one is most likely from the 16-50 the corners show some vignette; between the second one and the third, the Bokeh is smoother in the third, so I guess the second one is from the 1.7 and the last one is from the 1.4 (since the 1.4 has 8 blades whereas the 1.7 has 6 blades. So, it would in the order of 16-50, 1.7 and 1.4.
10-10-2009, 08:40 PM   #7
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First one: 16-50mm (it has a bit of vignetting), so, if the last two are the primes, second must be 50mm 1.7 (cooler colors) and third 50mm 1.4.
Anxiously waiting the liberating word.
10-11-2009, 09:20 AM   #8
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Here's the answer:
Number 1 is like most of you said - the 16-50
Number 2 is the SMC 1.4/50 and
Number 3 not really surprising anymore the F 1.7/50.

Congratulations to those who guessed right - have an e-cookie.


10-11-2009, 03:26 PM   #9
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`my guess:
1st - 50/1.4
2nd - 50/1.7
3rd - DA16-50

but 1 and 3 may be swapped...
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