Nokton 40.14 SC vs Nokton 50/1.5

5nap5hot

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I am looking to buy one of these lenses for my Leica M6 ... that i am buying shortly. I want a good low light lens for street photography. Does anyone have any experience with these lenses? They are about the same price...roughly. How much difference is there between them?

Thanks!
 
40mm lenses are strange to me, because not many cameras have frame lines for them...certainly not the M6.

I'd go with the 50 just so I don't have to guestimate or use an external finder. And the 1.4 or 1.5 thing seems negligible to me.

-Mitch
 
I've never tried to frame with a 40 using 50 framelines, but I would think (and others have confirmed here) that using the 35 framelines would be much easier.

I find 40 to be a great focal length, a perfect compromise between 50 and 35, and very close to human FOV. I'm considering the Bessa T and 40mm Nokton as my re-entry into M mount.
 
Besides the obvious difference in focal length, the other key difference between these two lenses is the minimum focus distance, which is 3 feet for the 50/1.5 & 28 inches for the 40/1.4. Do you need to focus closer than 3 feet?
 
If you're interested in test results, Popular Photography tested both of these lenses. The 40/1.4 scored better wide open & at the wider apertures generally (F/1.4 - f/2.8). The 50/1.5 scored better at mid apertures (F/4 - f/8). Both scored very well overall with the 40/1.4 having the edge in their tests. They called it "an instant classic." You can check their back issues for the reports.

These are two very different lens designs. The 50/1.5 is a modern design & uses an aspherical element. It seems to be designed for maximum sharpness. The 40/1.4 is a classic double-gauss design & seems to be diesigned to evoke more of the traditional look of the pre-aspherical era.
 
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5nap5hot said:
I would hope I am not taking street photography shots at less than 3 ft. It kinda intrudes on the shot. lol
Yeah, but that is a HUGE difference for me. Lots of times when shooting on the street I come across an architectural detail or other object that begs for close focus. Three feet just doesn't cut it for me.
 
Trying to cut down on size, I like the 40/1.4 because it's smaller. I have to admit, I do not have the 50/1.5 and doubt I would ever have one (unless I get an RD-1s). I'm just not a big 50mm fan.

I use the 40 as my main lens on my M6. I had it tweaked @ DAG to bring up the 35mm frame lines on my M6 and love it. It's fast, small and sharp. My main kit is a 15/4.5, 40/1.4 and 105/2.5. For me, it's the perfect all around lens.

The 50/1.5 just looks big to me. If I were not into small, I would go with a 35/1.2.

B2 (;->
 
There is a difference in size for one thing, the 40 is much more compact.

And this is very subjective, but I find the 50's OOF rendition wide open to be much more pleasant.

Both are very competent lenses.
 
Hei. I'm not saying this because I'm selling my 50/1.5 (I'm selling all my RF gear, poor me), but I had a 40 and sent it back because of its poor bokeh, like Tom notes. The 50 became my favorite instantly. Bigger, yes, better, also IMO.
 
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The 50s nice, bit big but nice where it counts

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