Harry: The vignetting is usually a result of the reversed lens not being fast enough or as a result of not being opened up all the way. I am afraid f2.8 isn't a fast enough 50 to get the aperture opened up enough to completely avoid vignetting... I have no vignetting issues but I also use an older Nikkor 50 f1.4.. Here are a couple of shots to show what the full open 50 does.... Keep in mind to that a direct reversed lens or a lens closely matching the length of the reversed does'nt get magnification up to the level to be clearly an advantage over a conventional macro lens.. In my opinion the advantage only comes in using a main lens of 100mm and higher... A wider angle lens can be used to compensate for the lens length being shorter but typicall under 28mm is very difficult to use.... Here are a couple of examples at just under 5x with the main lens set from 70 to 200 and a full set of tubes with the rev 50... Thanks for responding to this as I think if you give it another go you will see it has solid high mag advantages over conventional macro lenses.... One being 3 to 5x possibilities for the cost of a reversing ring, flash bracket and chord...Assuming the lenses are already owned.....Take care....Alex
Spider warning...
Not sure of ID but approx twice the size of a Jumping Spider
http://i110.photobucket.com/albums/n...ifest20872.jpg
Ant
http://i110.photobucket.com/albums/n...erse500192.jpg
Ants having dinner... These guys are about the size of a speck of dust
http://i110.photobucket.com/albums/n...tbugs20282.jpg
To compare: Here is a full grown dragonfly shot with 180 macro and full tube stack.. Max magnification at closest focusing distance..
http://i110.photobucket.com/albums/n...ISO200ALP2.jpg
The macro lenses with tubes get close but as you can see the reversed 50 stacked gets really close on bugs literally the size of a speck of dust... I will post some Midges and other bugs you can hardly see and you will be able to see perfect detail in their eyes.... Anyway. As you can see no detectable vignetting with the set up adjusted properly (with a wide open f1.4 or f1.8 50mm) The difference between 2x and 4x is substantial....Take care and thanks again for responding....Alex
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I know they are soft, I know they are out of focus, I know they lack contrast, I know my sensor needs to be cleaned, I know they are noisey, I know I should crop a little off the left side, I know I should find another hobby, but other than that how do you like them??
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Gear: Yes