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  Previous versions of georgweb's message #6257782 « summicron R 50mm »

  

georgweb
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Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 08:10 PM
georgweb
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Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 08:07 PM
georgweb
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Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 08:04 PM
georgweb
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Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 08:03 PM
georgweb
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Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 08:02 PM
georgweb
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Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 07:51 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 07:50 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped


Basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 07:50 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 07:49 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),

Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts


Oct 12, 2008 at 07:49 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts



Oct 12, 2008 at 07:48 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),


Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,



\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts



Oct 12, 2008 at 07:46 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),

Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts



Oct 12, 2008 at 07:45 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),

Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts



Oct 12, 2008 at 07:44 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),

Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts



Oct 12, 2008 at 07:43 PM
georgweb
Offline
Upload & Sell: Off
Re: summicron R 50mm


One more vote for the first version (E44?),

Leitz Wetzlar Summicron R 2/50 1st version Ser. 248X on K100D no PP, slightly cropped




Here\'s a basic sketch for the lens schemes,


\"The current Summicron-R is almost identical in optical construction with its counterpart in the M-system. It is one of the two or three best standard lenses in the world. The predecessor from 1964 was balanced for high contrast at wide openings. The disadvantage of the design was a slight shift of focus when stopping down, that resulted in the best sharpness zone shifting from center to a zone outside of the center. The current version is a bit less contrasty at full aperture, but performs better when stopping down, and its image quality is more evenly distributed over the whole image area. Stopped down to f/4 the lens already delivers its best performance.\" Source: Erwin Puts



Oct 09, 2008 at 06:33 PM





  Previous versions of georgweb's message #6257782 « summicron R 50mm »