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Magnifying lamp (glass) for solder work 3D or 5D ?

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VSV_electron:
Hello - I'm in need of buying a so-called "magnifying lamp" which is essentially a magnifying glass with LED lights mounted on an adjustable frame like this one:
https://modelisme.shop/Magnifying-lamp-with-clamp-foot-4037373777709

That one comes with both 3D and 5D exchangeable lenses but I can only find 3D OR 5D fixed lens versions locally for safe delivery.

Which one would be a safe bet for general purpose solder work which is mostly NON-SMD ? 3D or 5D (1.75x or 2.25x)?

I know, I know - the best answer would be to check it before buying but it's not possible in my situation. I can only order it online and hope for the right choice.

30 years ago I could easily solder 2.54 mm pin headers without any sight aids... not any longer. However - I still don't wear glasses as I get by without them for the majority of everyday tasks and only occasionally reach for a hand-help mag-glass to look at smallish things.

EDIT: For clarification, the 3D and 5D are magnifications in diopters (US spelling, dioptres for GB), that is 3 diopters and 5 diopters. The actual magnification ratios are 1.75x and 2.25x correspondingly.

shapirus:
Can you solder 2.54 mm * 1.75 = 4.45 mm joints without sight aids? What about 2.54 mm * 2.25 = 5.7 mm?

TimFox:

--- Quote from: VSV_electron on March 17, 2023, 06:19:44 pm ---Hello - I'm in need of buying a so-called "magnifying lamp" which is essentially a magnifying glass with LED lights mounted on an adjustable frame like this one:
https://modelisme.shop/Magnifying-lamp-with-clamp-foot-4037373777709

That one comes with both 3D and 5D exchangeable lenses but I can only find 3D OR 5D fixed lens versions locally for safe delivery.

Which one would be a safe bet for general purpose solder work which is mostly NON-SMD ? 3D or 5D (1.75x or 2.25x)?

I know, I know - the best answer would be to check it before buying but it's not possible in my situation. I can only order it online and hope for the right choice.

30 years ago I could easily solder 2.54 mm pin headers without any sight aids... not any longer. However - I still don't wear glasses as I get by without them for the majority of everyday tasks and only occasionally reach for a hand-help mag-glass to look at smallish things.

EDIT: For clarification, the 3D and 5D are magnifications in diopters (US spelling, dioptres for GB), that is 3 diopters and 5 diopters. The actual magnification ratios are 1.75x and 2.25x correspondingly.

--- End quote ---

Actually, diopters relate to the focal length of the lens:  the diopter value is the reciprocal of the focal length in meters.

VSV_electron:

--- Quote from: TimFox on March 17, 2023, 07:41:00 pm ---Actually, diopters relate to the focal length of the lens:  the diopter value is the reciprocal of the focal length in meters.

--- End quote ---

Oh - you could be perfectly right but for me that's only an indication of the magnification factor that is directly asssociated with the diopters value in this particular case and that is what matters.

The question remains however and I probably need to wait for someone who has some hands on experience with similar lenses.

LinuxHata:
After a long period of trying various ways, including factory made kits, I stopped on this DIY one and found it most practical (I do have 3D microscope as well, but I mostly use it for looking at UV erasable chips - just for fun).

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