hi All
i have a 5x4 sinar bellows viewer which is great
i recently got a spare bellows to enable me to do the same on my 8x10
but it is out of focus when i can see the whole screen
moving close brings it into focus so i guess i need different strength lenses
the 5x4 has about a 2x magnification
i’m sure some of you optical guys know exactly what i need to do or know the basic formula i need to work it out
best
robin
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