Hi, im from Patagonia Argentina, im taking basically black and white photos, developing and printing in my hometown lab.

Excellent! There will be times you will probably not want to compensate in your development, and all that can be easily worked out with some note-keeping of the results.

I have driven up part of Hwy 40 -- quite the adventure in the low slung vehicle I was driving...we then turned onto Hwy 41 back towards Chile. I had my 5x7 with me. This stretch of Hwy 41 is just before taking a different road into Chile, and was especially beautiful!

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