Search found 7 matches

by stillcool
Sat Mar 24, 2018 11:32 am
Forum: Illumination Techniques
Topic: Dark field illumination: Questions and answers
Replies: 65
Views: 36178

Re: Dark field illumination: Questions and answers

saw one on ebay US sold for 100 bucks
by stillcool
Fri Mar 23, 2018 4:54 pm
Forum: Illumination Techniques
Topic: microsystem 70 illumination
Replies: 18
Views: 8328

Re: microsystem 70 illumination

very valid point Apo. will try that tomorrow
by stillcool
Fri Mar 23, 2018 9:27 am
Forum: Illumination Techniques
Topic: microsystem 70 illumination
Replies: 18
Views: 8328

Re: microsystem 70 illumination

examining the bulb filament in detail shows a plain glass end and flat filament, i doubt there is any directional focus going on there. the led is the same, pointed at a white wall it gives a fairly even "wash" with little variation. I have a laser colliminator that im going to see if I can mount to...
by stillcool
Fri Mar 23, 2018 5:49 am
Forum: Illumination Techniques
Topic: microsystem 70 illumination
Replies: 18
Views: 8328

Re: microsystem 70 illumination

hmm, the condenser mount itself seems totally solid and undamaged, the adjustment system, springs one side screws the other, also seems free and the adjusters do actually work, they're just offset. if the condenser adjustment had another 1/2mm movement it would centre. i think ill strip the condense...
by stillcool
Thu Mar 22, 2018 4:34 pm
Forum: Illumination Techniques
Topic: microsystem 70 illumination
Replies: 18
Views: 8328

Re: microsystem 70 illumination

the beam hits the base of the condenser dead centre, tested using the iris fully closed. this was adjusted using the mirror adjustment screws, also swapping back to the bulb produces almost identical results . the led unit is not actually directional and is relying on the optics for focus, intensity...
by stillcool
Thu Mar 22, 2018 12:14 pm
Forum: Illumination Techniques
Topic: microsystem 70 illumination
Replies: 18
Views: 8328

Re: microsystem 70 illumination

[*]Update this is a very very basic and simple mod that places the LED in exactly the same place as the original bulb element without any mods to the actual scope. the led unit has been sleeved up to be a firm fit in the lampholder. I also spotted that the microscope has a 6 position objective turre...
by stillcool
Sun Mar 18, 2018 4:19 pm
Forum: Illumination Techniques
Topic: microsystem 70 illumination
Replies: 18
Views: 8328

microsystem 70 illumination

i am in the process of restoring one of these scopes. I have replaced the bulb unit with an led in exactly the same position. i can adjust the 45/ mirror in the base to centre the stopped down light on the base of the condenser (with iris closed) however when you try and centre the condenser to plac...