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| Wild Heerbrugg M7A Microscope - any experience |
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| jfiresto:
Yes, that is a Wild M7A mounted in someone else's carrier and focus rack. The original carrier+rack sits somewhat lower at the waist and does not cover the circular, exposure-time slide rule. The microscope appears to have a pair of original, 15X oculars for people who do not wear glasses. I think you would find a pair of later, high eyepoint 10X/22 or 10X/23 oculars would be a big improvement, even if you do not wear glasses. You can get a quite reasonable pair out of China for around $40–60. Just make sure they are adjustable as Wild put the intermediate images more deeply into the ocular tubes than just about everyone else. A pair of 5X oculars will win you little more field of view as the microscope vignettes somewhere beyond ...X/26.5mm. I see the microscope has its black accessory ring that spins on to the end of the objective. You will need that to add an 0.3X to 2.0X auxiliary objective. |
| stephenR:
Wow thank you @jfiresto for that fast and instructive answer. From what I understand this brand & model seems to be a good to very good unit? I wasn't sure if I was ripped-off for a defective unit when I bought it, but I got it for so cheap (less than 100$) that it was worth the risk . Now that I see that it's in perfect working conditions and that these units are going for around 1000US$, it is the deal of the year! I have looked around to find auxiliary lens 0.3 or 0.5 but the originals seems pretty rare. Do you know if there are adapters that would allow to fit more common after market lenses. Unfortunately the attachment mechanism looks quite unique. I think I will follow your advice and look for a pair of 10x eyepieces instead. In the meantime, when set it at minimum magnification 0.6x combined with the 15x eyepieces the resulting 9x is ok to start SMD soldering. Finally, I found the scanned pages (20) of original manufacturer's user manual for the M7A/M7S. If anyone is interested let me know, the zip file is relatively small at 5Mb. |
| jfiresto:
--- Quote from: stephenR on March 23, 2021, 06:14:09 pm ---From what I understand this brand & model seems to be a good to very good unit? I wasn't sure if I was ripped-off for a defective unit when I bought it, but I got it for so cheap (less than 100$) that it was worth the risk . Now that I see that it's in perfect working conditions and that these units are going for around 1000US$, it is the deal of the year! --- End quote --- You might pay a thousand dollars for a refurbished microscope from a used microscope dealer, but I think you did just fine. I expect you will get more than you paid for the microscope should you ever decide to sell it. Once you have had a chance to use it, I bet you won't. 8) --- Quote ---I have looked around to find auxiliary lens 0.3 or 0.5 but the originals seems pretty rare. Do you know if there are adapters that would allow to fit more common after market lenses. Unfortunately the attachment mechanism looks quite unique.... --- End quote --- I tried a couple 48mm thread, 0.5X auxiliary lenses meant for a Meiji and a Olympus microscope, but they were not very satisfactory in front of the M7A's much bigger objective. |
| jfiresto:
[I am bumping this old thread, in case someone else finds it, including the other posters who have been away from the forum for some months.] I now have Motic's copy, part number 1202A, of the Wild M3/M7A/M7S 0.5X auxiliary objective I mentioned earlier. It looks good so far and was $106.05 with free shipping within the U.S. from tequipment.net, after applying the EEVblog discount. |
| zkrx:
Hi everyone and hi jfiresto, I discovered this thread several months ago. I acquired an M7A (I think) approx. 2 years ago. It changed my life wrt SMD work. I've also just found a simple phototube adapter on the local used market for cheap. I'd like to attach a Nikon DSLR to it. jfiresto, your pictures look really good! Is your phototube splitter an original Wild? These look quite hard to find nowadays. Also, how did you fix your camera to the tube? And btw, thanks for the heads up regarding the Barlow lens! I was looking for an affordable option. |
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