 Posted: Mon Feb 11, 2013 5:20 pm Post subject: |
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danfromm wrote:
Ian, there are two coverage concepts in general use. One means illuminates, the other means puts good image in the corners.
Most people who hang a lens in front of a ground glass to find out whether the lens covers the format they want it to cover use the first concept. It is very difficult to evaluate image quality on a ground glass. The only safe way to determine whether a lens covers a format is to shoot a target that will allow image quality in the corners of the frame and then look at the negative at moderate magnification. 10x is enough. I've used 30x, it doesn't give more information than 10x.
Real people don't shoot 2x3 with lenses from 6x6 TLRs. There's a reason. They don't cover 2x3 in the sense of putting good image in the corners. The 65 you mentioned isn't particularly good on 6x6, will likely be poor on 2x3. The 55 is slightly interesting, but if you must do something like that the 58 Omega lens is a better gamble. I wouldn't touch Mamiya TLR lenses even though they are easy to find and relatively inexpensive.
If you can afford to play with Mamiya TLR lenses by all means do, and if you do please tell us how well they please you. But remember, you're poor (you say) and 47 SAs are expensive. Playing will reduce the rate at which your 47 SA fund grows. Its your money, your time, and your desire to by god do something, so do what pleases you. |
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