What coverage do I need as a minimum for 5X4 and what would be a good number. Re sponses to previous postings (blush) advised correctly that the lens I had acqui red wouldnt cover 5X4. When looking up specs etc in future I would like to have an approx benchmark. I cant find a simple definition in the archives (probably m eans its not simple !) e.g. it must be a minimum of 165mm to be practical.
Thanks
Dave
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