08-06-2010, 02:20 PM
Hi Serkan,[quote name='PuxaVida' timestamp='1281095388' post='1542']
Already said but, is there any reason for upgrading to fancy high MP cameras for testing purposes? A Nikon D200 with 10mp will tell you all that you need when it comes to comparing the various lenses by means of contrast, color reproduction, CA etc... [/quote]
I hope you don't mind me replying here, but I certainly do think so, that it makes a difference that is.
Lower MP cameras by their AA-filters put an artificial cap on resolution and a bunch of other features of a lens: you often get flat top MTF charts if you like, where edges to borders to centre of a lens , from a certain f-stop, often only one or two stops from wide open, behave more or less the same. This is not typical for most lenses at all, so in order to see what a lens really does or can do, the use of high MP cameras is a necessity. Either that or an optical bench. However, the latter is beyond the means of many a company, let alone PZ <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.
IMO, the better one knows the characteristics and quirks of a lens, the better one can use it to its advantage when actually out shooting.
And I totally agree with your last statement!
Kind regards, Wim
Already said but, is there any reason for upgrading to fancy high MP cameras for testing purposes? A Nikon D200 with 10mp will tell you all that you need when it comes to comparing the various lenses by means of contrast, color reproduction, CA etc... [/quote]
I hope you don't mind me replying here, but I certainly do think so, that it makes a difference that is.
Lower MP cameras by their AA-filters put an artificial cap on resolution and a bunch of other features of a lens: you often get flat top MTF charts if you like, where edges to borders to centre of a lens , from a certain f-stop, often only one or two stops from wide open, behave more or less the same. This is not typical for most lenses at all, so in order to see what a lens really does or can do, the use of high MP cameras is a necessity. Either that or an optical bench. However, the latter is beyond the means of many a company, let alone PZ <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.Quote:The key word is "comparable" here. Actually I've startled when Klaus said "we're going to switch to new Nikon bodies for testing soon". Ok, this may be a must concerning various reasons but what will happen then if we'd like to compare 3 lenses of 24-70mm range and let's say the 3rd will be tested with new body and the rest was already tested in D200? Then we'll need to take other technical issues into consideration, which does not make life easier for a proper lens choosing.
I believe the strength of PZ is that you can find soooo many lenses reported with a very decent reliability. This is nothing but a high performance.
Regards,
Serkan
IMO, the better one knows the characteristics and quirks of a lens, the better one can use it to its advantage when actually out shooting.
And I totally agree with your last statement!
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....