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Tom Hicks wrote:
Cableaddict wrote:
I have about 15 primes.
Take any prime 100mm or over and attach your 50mm to the front , to give you an idea of the mag you get divide 50 into the mm of the lens you are attaching it to.
50 into 100 = 2X
50 into 200 = 4X
get the idea. If you use a 100mm with the 50 you might get some vignetting if so add a 12mm extension tube to the camera first then the lens .
That's exactly what I was looking for. thanks!
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Now the other part:
Again, what's the best focus starting point? Is it best to focus with the "body" lens or the front lens? Is it best to keep one less near infinity, or near MFD?
How about aperture? Regardless of how the front lens is set, is it best to keep the body-lens wide open, for light, or stopped down, for sharpness?
I'm sure this all makes a difference, and it's pretty convoluted. Has anyone done extensive testing on this?
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