macro lens and techniques

hi,

ive really got into macro photography recently, especially insects and mini landscapes! but im using the reverse lens technique, 50mm on my 100m (f1.8/f.2)

its great for super close ups, but im losing alot of picture at the edges, cant really find out how to help with this, but anyway, is swapping my canon f2 lens for the canon f2.8 macro (non l) a good idea? obvioulst i wont get a supe rclose anymore, but that doesnt bother me, i just need something more practical! do you think someone out there would find that a good exchange?.

any other tips you think might help would be great!
 
What do you mean by "losing a lot of picture at the edges"? Mechanical vignetting? If so, what is the max aperture of your 50?

Or are you talking about being limited by the fixed magnification ratio, which is determined by the focal lengths of the two lenses that you are using? If so, then a dedicated macro lens makes a lot of sense. You can use different magnification ratios up to 1:1, which gives you more freedom for framing and then use the reverse lens technique for more specialized shots. Either that or pick up the MP-E 65. ;D
 
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