Samsung NX 16mm F/2.4 is actually 18mm ??

[SunnyFlorida]

The lens has heavy w/a distortion and it seems that after applying distortion correction the lens real Focal Length is along the lines of 18mm. Can someone who owns the lens please share your comments? I'm looking at buying it to supplement the 20-50mm kit lens, but if the real corrected FL is $18mm , not so sure that I need it.

 

[viking79]

SunnyFlorida wrote:

The lens has heavy w/a distortion and it seems that after applying distortion correction the lens real Focal Length is along the lines of 18mm. Can someone who owns the lens please share your comments? I'm looking at buying it to supplement the 20-50mm kit lens, but if the real corrected FL is $18mm , not so sure that I need it.

It is a 15mm vs about 17mm corrected based on what I measured. Remember, this is not atypical, if you look at the 18-55 it is closer to 20mm, and the 20-50mm closer to 22, so it is still wider and you can probably think of it as a 16mm class lens.

I wouldn't worry about it too much. What camera body are you using it on?

Eric

 

[SunnyFlorida]

Thanks Eric, I'll be using it on a NX1000, which I believe also has the auto-correction for w/a

ALso do you know where I can find side by side samples of uncorrected and corrected images?

 

[viking79]

SunnyFlorida wrote:

Thanks Eric, I'll be using it on a NX1000, which I believe also has the auto-correction for w/a

ALso do you know where I can find side by side samples of uncorrected and corrected images?

On the NX1000 you will be only able to shoot corrected images, unless you shoot RAW and use a RAW processing tool that will let you pull out the unprocessed image, like dcraw or a dcraw based converter, or something else that doesn't automatically fix the image for you. Lightroom will automatically correct your images with that camera I believe.

I don't think I have time this week, but could maybe shoot a 16mm image next to an uncorrected 18-55mm to see the difference.

I guess I like more difference between a 16mm and an 18-55 or 20-50mm (even if as specified). I use the 16mm with the 30mm pancake. With 18-55 or 20-50mm I would probably rather match something like the excellent new 12-24mm.

Eric

 

[SunnyFlorida]

Yes, I was looking at the 12-24mm, but I'd like to stay as compact as possible, for UWA I will probably add a fisheye lens + use rectlinear correction and crop

 

[Mescalamba]

Actually you can use Capture One 7 and disable corrections too, just in Lens correction tab set correction to generic and uncheck/check "hide distorted area". And voilá, you have original pic.

Another reason to like Capture One.

 

[zipser]

Actually 16/2.4 JPGs are narrower than 16mm declared by Samsung, but uncorrected RAWs are broader up to 15mm.




How to measure real view angle and what it is in case of Samsung 16/2.4 can be found here:

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www.lenstip.com

 

[Ariston]

SunnyFlorida wrote:

Yes, I was looking at the 12-24mm, but I'd like to stay as compact as possible, for UWA I will probably add a fisheye lens + use rectlinear correction and crop

any ultrawide angle lens suffer a certain amount of distortion and this is normal. that means focal length is compensated for corrections thereby reducing the advertised focal length further. however, focal lengths are much more approximation rather than being spot-on accurate. so a 16mm on one lens can be different on another 16mm.




the difference between a 16mm and a 20mm is insignifant if you are shooting near or close up subjects or doesn't have to deal with mid ground and background. it does however give a lot to farther subjects. a 12mm would give significant wideness for mid range shots.

the main difference between the 16mm and 20-50 is more on the image quality side of things as far as my experience with both lenses go.







speaking of the NX 12-24, it looks really compact and light compared to all the UW lenses that I have used.