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3121. 15" long:
3122. Sent in by someone who would like to find the exact purpose of this device, it's 9-1/4" long when collapsed and has about 1-1/2" of telescopic adjustment. All 3 lenses are Rodenstock 60mm with approximate apertures of f6, f8.5, and f12. The lens plate has about 2-1/2" of thread that it can be adjusted up and down and then locked in place with the screw on it.
3123. Around 4-1/2" long:
3124. 3-1/2" long:
3125. 7-1/4" long:
3126. About 4" long, take a look at Neatorama for more guesses and a chance to win a T-shirt.
The answers will be posted on Friday evening.
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To submit photos, send them to the address in my profile, please include dimensions, any text on the item, and where it was found.
Last week's set is seen below, click here to view the entire post.
More discussion and comments on these photos can be found at the newsgroup rec.puzzles.