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Message |
    
Adrian
Tinkerer
Username: Adrian
Post Number: 138
Registered: 08-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, February 21, 2008 - 07:11 am: | 
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I've just picked up a job lot of 32mm filters for a pittance on ebay. Amongst them are two clear glass ones labelled, on slip in the case, "3d close-up" and "1d close-up". Certainly, when peered through, they seem to focus considerably closer than the normal minimum distance. Googling hasn't worked for me because of the use of "3D" as a buzzword. Can anyone tell me any more about their application? Is the number a clue to the distance they fous at, or would I need an acesory rangefinder to try them?
Thanks,
Adrian |
Glenn
Tinkerer
Username: Glenn
Post Number: 284
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, February 21, 2008 - 01:23 pm: |
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Your lenses are 1 Diopter and 3 Diopter close-up lenses. Google diopter and you will find plenty of information. |
Adrian
Tinkerer
Username: Adrian
Post Number: 140
Registered: 08-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, February 22, 2008 - 02:35 am: |
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Brilliant, Glen - amazing the difference a single piece of info can make! Thank you very much!
Adrian |
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