Hello, I am using a 128mm enlarging lens to act as a loupe but with a 127mm lens on the camera I am still finding it difficult to focus on my subjects eye. I know 127mm is way too short for portraits but this is the only lens I have right now. I was looking at this loupe on freestyle photos that says 10x magnification. I wanted to know how magnification factor is calculated for example what magnification factor is my lens providing and whether this loupe from freestyle be a substantial increase in magnification - it is for almost 40 dollars.
Any help would be appreciated.
Cheers
Raffay
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