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35mm comparison


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#1 lleo

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Posted 10 September 2017 - 04:17 PM

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Camera on tripod. f/1,4 vs f/2.

It's quite clear one of the two is not really 35mm

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#2 milandro

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Posted 10 September 2017 - 05:03 PM

the focal length in all lenses is always been and always will be an approximated value.

 

Clearly one is approximated per excess and another per defect of 35mm or the angle of view can be slightly different even at the same focal length.

 

The same slight difference of angle that you have s “ discovered” is clear to see also on the pictures by Fuji itself. Curiously they too had a 35 1.4 which produced a darker image than a 35mm 2 and this shows also that , as it is always been, these values are approximated too.

 

XF35F1_1-4_35_STD.jpgXF35F2_2_35_STD.jpg


Edited by milandro, 10 September 2017 - 05:09 PM.

the popular expression wishful thinking is an oxymoron!

 

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#3 johant

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Posted 10 September 2017 - 06:19 PM

Indeed not really the same ... I prefer the look of the 35/1.4 photos, by the way.



#4 lleo

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Posted 10 September 2017 - 06:59 PM

I already saw the pics by Fuji. However I tend not to believe too much to "official" photos taken by companies since there's always the doubt regarding the business. Which lens do they want to sell more at that time? So, take those kind of pics not as the "holy truth".

I also think those pics are kinda fake. Not been taken who knows how, but surely not in the correct way.

My ones are much more trusty. I tried to change the lens as soon as I shot the first pic, with self timer at 2 secs, and you can see there isn't a huge difference in light as in the ones taken by Fuji.



#5 milandro

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Posted 10 September 2017 - 07:48 PM

actually I see the exact same smaller field and aperture differences that your pictures have.

 

Anyway there are no revelations there that Fuji didn’t dislclose


Edited by milandro, 11 September 2017 - 10:13 AM.

the popular expression wishful thinking is an oxymoron!

 

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#6 Mistik-ka

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Posted 10 September 2017 - 09:15 PM

actually I see the exact same smaller fiend and aperture differences.

 

Anyway there are no revelations there that Fuji didn’t dislclose

 

I don't recall them disclosing the different fiends in their lenses. When I stumble upon one from time to time it always comes as a surprise.  :unsure:



#7 BillSnell

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Posted 10 September 2017 - 10:42 PM

Hi, Maybe it is image correction either in camera (jpeg) or in whatever software you may use (Raw). There would be more lens distortion to correct in the f1.4 than the f2 I would think.



#8 milandro

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Posted 11 September 2017 - 07:47 AM

this is not a distortion but a difference of field view (or angle or view).

 

As I wrote before,  the nominal focal lens is always an approximation (and it is always been throughout the history of photography)

 

They have published this pictures that I’ve shown above and the difference in angle of view is to see in plain sight. And, to me they are absolutely consistent with OP’s pictures above.

 

They show one lens having a little wider field of view (and a difference in exposure consistent in both examples, Fuji’s and Op’s).

 

So they have never made any mystery of this.

 

The declared ( in the lens specifications by Fuji) angle of view of the 1.4 is 44.2º and the one of the f2 is a 44.1º and this is clearly what we see in their pictures too.

 

One is minutely wider than the other. That’s it. No big deal.


Edited by milandro, 11 September 2017 - 03:52 PM.

the popular expression wishful thinking is an oxymoron!

 

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#9 lleo

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Posted 13 September 2017 - 12:21 PM

Hi, Maybe it is image correction either in camera (jpeg) or in whatever software you may use (Raw). There would be more lens distortion to correct in the f1.4 than the f2 I would think.

 

Bill, if I remember well, the f/1.4 has the correction of the distortion directly inside the lens (the optical scheme), while the f/2 has it through the in camera software



#10 lleo

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Posted 13 September 2017 - 12:25 PM

actually I see the exact same smaller field and aperture differences that your pictures have.

 

Anyway there are no revelations there that Fuji didn’t dislclose

 

It's about the light, not the field of view. It's impossible for one lens being as much darker as the other, compared to the pictures I took. Unless one of the two as an issue. But haveing seen the sky, I rather think they took the picture while the sun was covered by a cloud. A mistake not to do if comparing lenses or cameras or other.



#11 milandro

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Posted 13 September 2017 - 01:50 PM

But your original comment was about the angle not about the light difference ( which is present and consistent in both your and their picture alike).

 

However we are repeating ourselves.

 

We made our point. I have no reason to argue with you.

 

People can judge for themselves.

 

 

Camera on tripod. f/1,4 vs f/2.

It's quite clear one of the two is not really 35mm


Edited by milandro, 13 September 2017 - 02:02 PM.

the popular expression wishful thinking is an oxymoron!

 

To all TAPATALK users

 
As a form of courtesy towards your fellow users of this forum, PLEASE remove the obnoxious tapatalk signature, it adds nothing to anyone’s contribution and it is only a sneaky way used by tapatalk to push their product by polluting each forum participant with promoting their products with unpaid advertising for their software and the brand of your phone. Removing it is easy and it is an act of courtesy that shows respect for all those whom are annoyed by this pointless feature. This is not a personal attack to you, the annoyance is caused by tapatalk and the phone or tablet brands, they are getting all the exposure and you gain nothing by this.

#12 lleo

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Posted 14 September 2017 - 10:58 AM

Not arguing but it seems to be in school with "...my pen is better than yours..." or "...my solution to the problem is better than yours..."

I guess it's clear when I posted my pictures you haven't posted yours yet, or am I wrong? So I couldn't see the light stuff.

Then, once you posted those samples, I noticed it and I wrote that.

It's as simple as that. But, related to the next posts, let me know because every time I'll post one I might add "...this is my post, but Milandro will surely arrive with the right one".



#13 milandro

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Posted 14 September 2017 - 12:54 PM

If it pleases you I will tell that you are right in having made your discovery.

 

I don’t have a horse in this race.

 

Be well and enjoy all your lenses. 


Edited by milandro, 14 September 2017 - 01:32 PM.

the popular expression wishful thinking is an oxymoron!

 

To all TAPATALK users

 
As a form of courtesy towards your fellow users of this forum, PLEASE remove the obnoxious tapatalk signature, it adds nothing to anyone’s contribution and it is only a sneaky way used by tapatalk to push their product by polluting each forum participant with promoting their products with unpaid advertising for their software and the brand of your phone. Removing it is easy and it is an act of courtesy that shows respect for all those whom are annoyed by this pointless feature. This is not a personal attack to you, the annoyance is caused by tapatalk and the phone or tablet brands, they are getting all the exposure and you gain nothing by this.

#14 lleo

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Posted 14 September 2017 - 04:19 PM

Thank you, same to you.




 
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