Need a manual for Olympus SZ 45 stereo microscope # 345483

All user (instruction) manuals from Olympus can be found on the Olympus website. I most of the time go to the USA site, because they are more generous in providing support.

Open in Adobe Reader and select print:
http://www.olympusamerica.com/files/oima_cckb/SZ-14_SZ-12_Instruction_Manual_EN.pdf

You may download a copy of the manual at http://www.olympusamerica.com/files/oima_cckb/SZ-10_SZ-20_Instruction_Manual_EN.pdf

Do you mean the SZ-12? If so, see pages 19 and 22 of the manual at http://www.olympusamerica.com/files/oima_cckb/SZ-14_SZ-12_Instruction_Manual_EN.pdf

If you mean the SZ-12, see pages 19 and 22 of the manual at http://www.olympusamerica.com/files/oima_cckb/SZ-14_SZ-12_Instruction_Manual_EN.pdf

https://www.olympus-lifescience.com/en/support/instruction-manual-downloads/

http://www.science-info.net/docs/olympus/olympus-sz30-sz40-sz60-sz11-instructions.pdf

You may download a PDF manual and/or order a printed manual from here.

Olympus makes good microscopes so you have done well and stereo microscopes are so much nicer to use than singles. As far as cleaning the lenses goes, buy a good quality camera lens blower brush and also a can of compressed air like the ones used for computers. Blow any loose dust hairs etc off with the can of air and then use the brush for anything remaining. If there are fingerprints or grease on the lenses then clean them using camera lens cleaning fluid and lens tissue but make sure all debris and dust are removed first or you may scratch the lenses. In general try not to use anything more than air and a brush unless absolutely necessary. Another option for removing fingerprints etc is to use a "lens pen" with caution. The ones sold for cameras work well but may be too large. They make some smaller ones for cleaning camera sensors and those might work better for the relatively small microscope lenses or just cut the regular lens pen disk to make it smaller. It is just as important to make sure the lens is dust/debris free when using the lens pens.
Low power stereo microscopes often allow you to put on a single magnifier lens in front of the main objectives to increase magnification. Do a bit of searching to find what are options for your model.

http://www.science-info.net/docs/olympus/olympus-bh-2-bht-manual.pdf
enjoy

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