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Ken Rockwell, Has Posted A Comparison Sharpness Of Leica 35mm Summicron-M Lenses.

BRJR

By BRJR
in Customer Forum

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jacarape

jacarape

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Well we can't really take this review seriously, he didn't even shoot a brick wall. Obviously he doesn't know how to test a lens.

 

Look at these expert reviews, now these guys can review a product. The product is a Bic Crystalball pen.

 

Here is the most "helpful" review, the rest are as equally good. Though I didn't see any from Ken Rockwell or Chuck Norris.

 

Left handers beware...

Worked fine with my right hand, but when I came to use my left hand my writing came out looking like the work of a complete imbecile. I can only assume Bic have created a right-handed only pen, and would caution left-handers to "try before you buy".

 

Amazon.co.uk: Customer Reviews: Bic Crystal Ballpoint Pen, Medium Point, Black

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lct

lct

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...Put's little hand book only provided one (MTF) for 'both' lenses he 'implies' they would be the same, and does not indicate a # for change over...

Thank you Noel. Must be 'Leica M-Lenses their soul and secrets' i guess. In his 'Compendium', Puts says that the 35/2 IV is 'very soft' in the corners. Here is a chart of an early copy of the 35/2 IV (1979) by a French mag which has disappeared since then. I have a lens from the same period and the sides are generally sharper than the center as well.

 

5362286298_52843fb5e3_z.jpg

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BRJR

BRJR

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... Most of his pieces on Leica are all good, ... and anyone who is for Leica Inc staying profitable or becoming more profitable ought to be all for him, esp as he is not a fanboy for any maker .... Plus, he has more pieces on Leicas than your avg quarter's worth of pop foto mags.

 

.... Besides, looks like a pretty positive review - so, good for Leica. Be happy & do your own comparisons. :p Thanks for posting.

 

I, totally agree with you; and, for amateurs such as myself that knew absolutely nothing about Leica until the release of the Leica M8.2, KR's web site has played a big role in what we know about Leica, and in the language we understand. I've learned a lot about Leica, from primarily three sites: Leica.com, Kenrockwell.com, and here at the Leica User Forum. Prior to knowing anything about Leica cameras, I had been familar with KR's forum for I was solely a Nikon User, with Nikon equipment, some of which is seen in my profile (click, "View Plan"), at the link below; therefore, IMO, KR is exposing/converting a lot of non Leica people to Leica than would otherwise occur (I know, as I am one of these people ;) ):

 

Member profile: BRJR: Digital Photography Review

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Ecaton

Ecaton

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Come on guys. Who of you has not watched at least one Chuck Norris movie or visited KR's webpage more than once:p.

In the shots with the aspherical version, I recognize my lens' performance/rendering. So It is reasonable to assume that the pictures taken with the other versions provide some useful information as well. The writing between the pictures, oh well........, but where can I find a comparison of all the cron 35 versions otherwise?

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Per P.

Per P.

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I'm with Ecaton here, even if I don't think I've watched a Chuck Norris. KR scores high on entertainment value for a Leica reviewer, he can certainly photograph, and who cares if his opinions are intended to be objective or light the flame. They are just that - opinions :)

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Xmas

Xmas

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Hi Andy

 

Ditto twice...

 

The MTF charts are in Put's 'Leica Camera and Lens Pocket Book 7th Edition Hove...'

This includes all the 35mm from Elmar f/3.5 to lux type I asph. The floating lux should be on the Leica site.

 

Except the type II and Type III crons 'share a chart'.

 

I accept that taking shots through a lens is different however it is similarly limited as it only shows how the lens does in that scenario. The example is street shooting low winter sun with his coded type IV telescope hood 5cm cron, my mate gets frequent iris images that Ive never seen with my early type IV detachable hood cron. We blamed the IR fiter and dig sensor, rather than the lens.

 

Noel

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Xmas

Xmas

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Thank you Noel. Must be 'Leica M-Lenses their soul and secrets' i guess. In his 'Compendium', Puts says that the 35/2 IV is 'very soft' in the corners. Here is a chart of an early copy of the 35/2 IV (1979) by a French mag which has disappeared since then. I have a lens from the same period and the sides are generally sharper than the center as well.

Hi

The Puts' reference is in previous post

A f/2 35mm 24x36 was a difficult lens to design, until multi coating, the wide availability of very high refractive index crown and flint glasses, and aspheric options. The designer still uses physical vignetting to keep the performance sensibly uniform into the corners.

I dont need detail in the corners...

Noel

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Dan States

Dan States

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Well I not sure about your sympathy, e.g. when you have built your prototype (lens) as well as the normal MTF at infinity it would be normal to do variations, as well as taking photos. You would not necessarily refocus off axis or at different apertures.

 

They dont normally publish the variations, but the designer would look at them, think Zeiss describe some of this on their site.

 

Bokeh is subjective... The design software will do plots of this, and they could publish the signatures, perhaps if we asked them.

 

The MTF at the largest aperature is meaningful, the variation off axis is most significant.

 

Noel

 

I agree that mtf data is very important but it can also be misread. Take the Zeiss zm 28 for example...a lens that has been pilloried by some based on the off axis mtf data. What the detractors of this lens don't take into account is the effect of field curvature on mtf curves. To interpret the lens a poor off axis would be wrong unless you are shooting walls and news papers.

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ho_co

ho_co

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Have you noticed, Ken is being discussed in another thread on this forum: http://www.l-camera-forum.com/leica-forum/leica-m9-forum/161096-m9-dng-color-problem-irresolvable.html.

 

 

What fascinates me is that his home page photo (KenRockwell.com: Photography, enlarged version at http://www.kenrockwell.com/Images/me/KR-WAP-1481-pxl.jpg) is left-right reversed.

 

  • One could say it's artistically better this way.
  • One could say he just hasn't noticed yet.
  • One could say (if one wanted to be negative) that as a narcissist he's so used to seeing himself in a mirror that this looks 'right' to him.
  • Maybe he's just showing us that Nikon builds cameras for left-handers, too.

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