Hi guys
Finally got all the bits and bobs I needed to have a go at converting my Leitz scope from Halogen to led illumination (you weren`t joking about the slow boat from China John ).
It has come about more of necessity than just a trial really as the mini supernova (ie halogen bulb) was warming up my desk a bit too much for comfort as unlike John`s its placed in a lamp housing at the back of the scope with the bulb literally millimeters from the wood desk top.
I wanted to do a minimum alteration of the scope just in case I needed to make it Halogen lit again. I was tempted to install the bulb under the diaphragm like John`s conversion but thought I`d try it in the existing housing first and it seems to work perfectly plus I really didn`t want to remove all the lens/mirror/prism assembly.
My new setup seems to work brilliantly and very pleased with it. If anything its a Tad less bright than the Halogen but hardly worth bothering with.
I did also notice using the x4 objective that a dark ring is noticable on the outside of the FOV regardless of how bright the dimmer unit is or how much the diaphragm or condenser is adjusted but no problem with any other objectives.
Big thanks to John (mrsonchus) for his excellent instructions.
regards
Steve
Ps apologies for the order of the images, I think I should have started with the last one first ??
My version of John`s halogen-led conversion!
My version of John`s halogen-led conversion!
- Attachments
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- Out with the Dremmel to make a slot in the Keyhole fitting 0.5" futher back, seems more central no.
- bulbafter.jpg (176.21 KiB) Viewed 4996 times
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- The new bulb was just off centre by about 0.5" so not all the light went to the mirror/lens assembly.
- bulbbefore.jpg (173.15 KiB) Viewed 4996 times
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- Already had a diffuser disc in place.
- rearhousinglens.jpg (159.21 KiB) Viewed 4996 times
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- The bulb easily replaced the Halogen bulb.
- bulbtohousing.jpg (213.96 KiB) Viewed 4996 times
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- Shot with base cover off.
- underbase.jpg (205.13 KiB) Viewed 4996 times
Re: My version of John`s halogen-led conversion!
Aha! Nicely done old chap - that's the kit!
I too fitted mine as as easy-to-remove install. I could convert it back to it's original 20W Halogen in about 45 minutes. I'm pretty sure the SMD 'bulb' is indeed 3W.
Nice job - and so cheap & easy to do.
I too fitted mine as as easy-to-remove install. I could convert it back to it's original 20W Halogen in about 45 minutes. I'm pretty sure the SMD 'bulb' is indeed 3W.
Nice job - and so cheap & easy to do.
John B
Re: My version of John`s halogen-led conversion!
Yes.. This is a neat and cheap way to upgrade to LED... Well done friends!..
BillT
BillT
Re: My version of John`s halogen-led conversion!
If you have kept the original assembly and placed the LED in the same position as the original bulb's filament,I wanted to do a minimum alteration of the scope just in case I needed to make it Halogen lit again. I was tempted to install the bulb under the diaphragm like John`s conversion but thought I`d try it in the existing housing first and it seems to work perfectly plus I really didn`t want to remove all the lens/mirror/prism assembly.
then you should be able to focus it and therefore achieve Köhler.
If ever you require a brighter light (more than the halogen) then a single LED bulb such as the Cree XM-L should do it.
The LED is 5mm x 5mm which should be close to the size of the halogen bulb's filament.
http://www.cree.com/LED-Components-and- ... /XLamp-XML
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)
Re: My version of John`s halogen-led conversion!
Just realised I forgot to flip up the condenser lens when using x4 ,FOV fine now Doh!!
Thanks for the info
Steve
Thanks for the info
Steve
Re: My version of John`s halogen-led conversion!
I have found that slightly embarrassing solutions are the cheapest and quickest to implement,Just realised I forgot to flip up the condenser lens when using x4 ,FOV fine now Doh!!
so I have not just learned to live with these little slips; I welcome them!
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)