Hi Mr Blume,
Thank you for referring me to that site and now I understand what aspheric means.
How trustworthy is my review ? I wrote it because it helps to organize my thought before purchasing the gears,afterall it is quite an investment. I only have the intention to know about the truth. I have only two G lenses,the information I gathered for the other lenses are derived from the manufacturer's MTF charts,www.photodo.com,www.geocities/ilprode www.zeissikon.com and www.photographyreview.com
I agree the review will be a lot more trustworthy if I had the chance to test all the lenses,but it seems this is a bit too far. Although many people do not trust the MTF charts, I find it helpful to consider before buying,it helps to make the right choice.
I have 10 Zeiss lenses,my photographic experience correlates very well with the Zeiss charts,so are my 3 Leica lenses. I find the MTFs from these people trustworthy. Afterall,the MTF is very scientific to measure a fundamental property of the lens. It is communicatable and reproducible. The ilprode site is also accurate,although it only contains informations for C-Y lenses. The interpretation of photodo has to be careful,I find the MTF score for each f-no more accurate than the overall grade of the lens.I would add plus or minus 0.1 at the latter. The photographyreview tells you about the impression of the users and it is useful when he or she is talking about two lenses that you want to compare.
By looking at the charts,50 mm 1.4 S'lux performs so well at 1.4 that you will know that its MTF at f2 outperforms the others. The reason I say G45 is the best preformer at f4 are as follow.(1) this lens has good MTF curves at f4 and the curves are more or less the same as others at 5.6 (2) At p'review site,4 people have both G45 and S'ron,3 said G is better (3) photodo gives better MTF value for the G in overall grade and each f no.
I myself is confident on my review as far as MTF are concern. Although the curves do not give a complete picture of the lens,it does provide important informations to make the choice to buy or not to buy.
Thank you for referring me to that site and now I understand what aspheric means.
How trustworthy is my review ? I wrote it because it helps to organize my thought before purchasing the gears,afterall it is quite an investment. I only have the intention to know about the truth. I have only two G lenses,the information I gathered for the other lenses are derived from the manufacturer's MTF charts,www.photodo.com,www.geocities/ilprode www.zeissikon.com and www.photographyreview.com
I agree the review will be a lot more trustworthy if I had the chance to test all the lenses,but it seems this is a bit too far. Although many people do not trust the MTF charts, I find it helpful to consider before buying,it helps to make the right choice.
I have 10 Zeiss lenses,my photographic experience correlates very well with the Zeiss charts,so are my 3 Leica lenses. I find the MTFs from these people trustworthy. Afterall,the MTF is very scientific to measure a fundamental property of the lens. It is communicatable and reproducible. The ilprode site is also accurate,although it only contains informations for C-Y lenses. The interpretation of photodo has to be careful,I find the MTF score for each f-no more accurate than the overall grade of the lens.I would add plus or minus 0.1 at the latter. The photographyreview tells you about the impression of the users and it is useful when he or she is talking about two lenses that you want to compare.
By looking at the charts,50 mm 1.4 S'lux performs so well at 1.4 that you will know that its MTF at f2 outperforms the others. The reason I say G45 is the best preformer at f4 are as follow.(1) this lens has good MTF curves at f4 and the curves are more or less the same as others at 5.6 (2) At p'review site,4 people have both G45 and S'ron,3 said G is better (3) photodo gives better MTF value for the G in overall grade and each f no.
I myself is confident on my review as far as MTF are concern. Although the curves do not give a complete picture of the lens,it does provide important informations to make the choice to buy or not to buy.