Reply to thread

Message

<blockquote data-quote="480sparky" data-source="post: 537608" data-attributes="member: 15805">I think we 'get' what you mean here, but since there's absolutely no reference in the original image to verify what format the original image was taken with, it's not relevant.&nbsp; The image could have been taken with any imaging device.&nbsp; I can take a shot with a 35mm on a DX body, a 50mm on an FX body, a 90mm on a MF body or a 150mm on a 4x5.&nbsp; Or set my P7100 to 11mm.&nbsp; Or use a 210mm on a 5x7.&nbsp; Or my smartphone at 6mm. Or a 300mm on an 8x10.And then use any one of those shots to 'create' a chart as posted in the OP.&nbsp; Drawing the rectangles would be simply a matter of doing the math.Fact is, without noting what format is being referenced to by the&nbsp; image, the focal lengths are pretty much meaningless.&nbsp; One might assume&nbsp; it's either a crop sensor or possibly full-frame DSLR or SLR film, but&nbsp; otherwise, by itself, the 'chart' is useless.</blockquote>

[QUOTE="480sparky, post: 537608, member: 15805"] I think we 'get' what you mean here, but since there's absolutely no reference in the original image to verify what format the original image was taken with, it's not relevant. The image could have been taken with[I] any[/I] imaging device. I can take a shot with a 35mm on a DX body, a 50mm on an FX body, a 90mm on a MF body or a 150mm on a 4x5. Or set my P7100 to 11mm. Or use a 210mm on a 5x7. Or my smartphone at 6mm. Or a 300mm on an 8x10. And then use any one of those shots to 'create' a chart as posted in the OP. Drawing the rectangles would be simply a matter of doing the math. Fact is, without noting what format is being referenced to by the image, the focal lengths are pretty much meaningless. One might assume it's either a crop sensor or possibly full-frame DSLR or SLR film, but otherwise, by itself, the 'chart' is useless. [/QUOTE]

Verification