tag:blogger.com,1999:blog-1709537690528523236.post3054676792289598776..comments2024-03-29T05:47:08.860+10:00Comments on in my view ...: Pixels to Perceptual Mega Pixel (data review)obakesanhttp://www.blogger.com/profile/13743339737847465926noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-1709537690528523236.post-27795787469446413932014-01-17T04:11:22.894+10:002014-01-17T04:11:22.894+10:00Hi Jann0K and thanks for your comment.
Actually I...Hi Jann0K and thanks for your comment.<br /><br />Actually I was going to address the point you raised "But dxomark rating system is not good for comparing lenses between different systems as at first it seems that FF lenses are the best (in resolution and dxoscore). But because m43 sensor is 4x smaller (in size) "<br /><br />which is why I included the 35mm f2 lens with the 7D where it only scores 9P-MPix (unlike the score of 11 that it gets on the 5D and 17P-Mpix on the 5DmkII). Obviously as long as the body and lens combo is present you can get a clear idea, however you can still sort of sus out how it will perform as the score of 9 on the 7D is a similar ratio to cropping APS out of the guts of a 5DMkII. <br /><br />Obviously MTF tells a better story, but only for those who can read that language :-)obakesanhttps://www.blogger.com/profile/13743339737847465926noreply@blogger.comtag:blogger.com,1999:blog-1709537690528523236.post-18655553029280257372014-01-17T03:50:43.279+10:002014-01-17T03:50:43.279+10:00Thanks to your previous article I now understand d...Thanks to your previous article I now understand dxomark P-MPix rating.<br /><br />You are right that it doesn't make sense to add more pixels into m43 system. And it also means that FF or larger is better when big prints are needed. <br /><br />But dxomark rating system is not good for comparing lenses between different systems as at first it seems that FF lenses are the best (in resolution and dxoscore). But because m43 sensor is 4x smaller (in size) than FF sensor, then 16MB m43 sensor resolution is actually equal to 64MB FF sensor resolution.<br /><br />Thats why 5D gets very good ratio as even medicore lenses outresolv its sensor resolution. To compare lens resolution (lpmm) on dxomark they need to be mounted on similar resolution sensor eg 16MB m43 and 24MB DX sensor and then adjust MPix ratio to get comparable lpmm. But dxomark PMpix only shows center sharpness at sharpest aperture. I like lenstip review more for comparing lenses on different systems as they display lpmm on different apertures on center and edge.<br /><br />Of cause for system (lens+sensor) dxomark PMpix is about correct as higger Mpix pictures can be printed larger. At a same time for web 12MB sensor is more than enough as 4K (~4MB) displays are now appearing and most of people are using 2K displays. I also have 100cm x 70cm photo printed from 12MB Nikon 5000 sensor and from normal viewing distance its more than good enough.jann0khttps://www.blogger.com/profile/06104852843827812419noreply@blogger.com