A.O. bits wanted

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Element 56
Posts: 308
Joined: Thu Oct 13, 2016 3:48 pm
Location: Lancaster County, PA

Re: A.O. bits wanted

#31 Post by Element 56 » Mon Jul 13, 2020 6:24 pm

arb566 wrote:
Mon Jul 13, 2020 3:47 am
I would certainly like to find a way to compare with the forks on my 110. Has anyone ever taken calipers to a set of forks that fit the 214 or 218?

A couple more questions if I may,

According to Kirby the manual for the 214 says for 40x and above. Does this restriction apply to the 218 as well? I use a 20x regularly so this would be an issue.
The 214F and 218F are both listed as being "primarily for use with objectives equal to or greater than 40x". The K2172 is listed as a "Large area darkfield condenser with toric lens is a special model for viewing large areas and can be used with objective equal to or greater than 10x". All three are listed together in my AO reference manual.

The dovetail on the 214F measures approximately 1.700" to 1.865".

Also of interest in the manual,

"AO darkfield condensers are of bispheric design and require the use of immersion oil between the top of the condenser and the specimen slide. These condensers are for use with AO Microstar Microscopes Series 2, 4, 10 and 20".

Kirby

Element 56
Posts: 308
Joined: Thu Oct 13, 2016 3:48 pm
Location: Lancaster County, PA

Re: A.O. bits wanted

#32 Post by Element 56 » Mon Jul 13, 2020 7:34 pm

Sorry I should have added, I have the following AO microscopes and my 214F condensers fit all of them.

2-1, 4-1, 10-8 and 10-118.

I'm not real familiar with AO model numbers so I'm not sure if what I have is a model 110 or if their model 10's.

I hope this helps!

Kirby

Zuul
Posts: 212
Joined: Fri May 01, 2020 9:01 pm
Location: California

Re: A.O. bits wanted

#33 Post by Zuul » Mon Jul 13, 2020 9:05 pm

Element 56 wrote:
Mon Jul 13, 2020 7:34 pm
Sorry I should have added, I have the following AO microscopes and my 214F condensers fit all of them.

2-1, 4-1, 10-8 and 10-118.

I'm not real familiar with AO model numbers so I'm not sure if what I have is a model 110 or if their model 10's.

I hope this helps!

Kirby
That is a series 2, a series 4 and two series 10's. Those are the stands it was made for.

Element 56
Posts: 308
Joined: Thu Oct 13, 2016 3:48 pm
Location: Lancaster County, PA

Re: A.O. bits wanted

#34 Post by Element 56 » Mon Jul 13, 2020 11:43 pm

Thanks Zuul!

What does the -118 and -8 mean?

Kirby

apochronaut
Posts: 3818
Joined: Fri May 15, 2015 12:15 am

Re: A.O. bits wanted

#35 Post by apochronaut » Mon Jul 13, 2020 11:59 pm

Element 56 wrote:
Mon Jul 13, 2020 6:24 pm
arb566 wrote:
Mon Jul 13, 2020 3:47 am
I would certainly like to find a way to compare with the forks on my 110. Has anyone ever taken calipers to a set of forks that fit the 214 or 218?

A couple more questions if I may,

According to Kirby the manual for the 214 says for 40x and above. Does this restriction apply to the 218 as well? I use a 20x regularly so this would be an issue.
The 214F and 218F are both listed as being "primarily for use with objectives equal to or greater than 40x". The K2172 is listed as a "Large area darkfield condenser with toric lens is a special model for viewing large areas and can be used with objective equal to or greater than 10x". All three are listed together in my AO reference manual.

The dovetail on the 214F measures approximately 1.700" to 1.865".

Also of interest in the manual,

"AO darkfield condensers are of bispheric design and require the use of immersion oil between the top of the condenser and the specimen slide. These condensers are for use with AO Microstar Microscopes Series 2, 4, 10 and 20".

Kirby
The K2172 is in fact a Reichert condenser, originally made for the Zetopan and other Reichert stands of the mid-60's. It was modified for use in the 10 and 20 . The modification is slight. Just a machined ring and the dovetail over that. This is one.
https://www.ebay.com/itm/Reichert-Zetop ... SwU55c5X6l

Zuul
Posts: 212
Joined: Fri May 01, 2020 9:01 pm
Location: California

Re: A.O. bits wanted

#36 Post by Zuul » Tue Jul 14, 2020 2:57 am

Element 56 wrote:
Mon Jul 13, 2020 11:43 pm
Thanks Zuul!

What does the -118 and -8 mean?

Kirby

I wish I had a wise, well informed answer, but no. I’ve seen them referred to that way often enough to recognize the designation but no idea what it means. It’s not the catalog number.

arb566
Posts: 32
Joined: Mon Mar 23, 2020 5:47 am
Location: British Columbia Canada

Re: A.O. bits wanted

#37 Post by arb566 » Wed Jul 15, 2020 2:07 am

Well, the idea of a self illuminating condenser grew on me, After hearing repeatedly about the 110 being a bit anemic trying to handle the higher power objectives I decided this would be worth pursuing. As a result I made an offer on the 218f listed on Ebay and it was accepted. Hopefully I can make it fit and center without too much trouble.
The next issue will be adapting some form of light. the only info I've found lists the bulb as 6.5V at 1.7amps (11 watts?) using the cat#1051 transformer. I rather doubt I'll run across an original lamp socket so it will probably mean a little head scratching and deep digging in my box of bits and bobs to cobble something together. Brilliant suggestions are most welcome. I think the heat issue will rule out halogen so it will be between tungsten and led. If anyone has this bulb socket I'd be very interested in knowing the position of the filament in relation to the lens.

Cheers, Al.

apochronaut
Posts: 3818
Joined: Fri May 15, 2015 12:15 am

Re: A.O. bits wanted

#38 Post by apochronaut » Wed Jul 15, 2020 10:23 am

Those quite often show up lacking the illuminator socket. They are very similar to the 214F, just housing a heat absorptive window that it does not have, so you can use it up to the 63X objective without the illuminator, which is how a lot likely have been used, hence the misplaced socket You will need it for the 100X. You will also need a #1079 100X objective to put the funnel stop in that came with the condenser. The threads will be different on the two funnel stops. One is for the 1079 and the other is for the 97X(some rare 100s exist too) for the later 160mm scopes: 2/4 and 15/35.
The alternative is to keep an eye out for an iris equipped # 1014 objective. If you get into high magnification DF to the point that you are using the 100X a lot, you may find that you need to back and forth between it and a lower magnification some. Removing the oil to do so is a ridiculous practice, so the wise and committed manufacturers of microscopes , like AO , made available oil immersion lower magnification objectives, partially for that purpose but also for fluorescence applications. There are two 50X oil immersion: the 1016 50X .80 planachro and the 1026 50X achromat. Both have irises.
Personally, I would recommend the #1026. They are less common, though. Here is the reason. I did a comparison test of all of the 34mm parfocal 40-50X infinity corrected AO objectives some time back. While I was doing it I decided to try out the two oil immersion versions with water immersion as well as dry. While neither suited the 1016, the 1026 produced a very acceptable image with both water and dry. When used dry, the 1026 was about as good as an average .65 achromat, so you could fit it in the nosepiece and use it either dry or with oil as your choice. It's oil immersed image is quite highly resolved, just a hair below that of the 1016. I think the 1026 has better colour correction, probably due to the 1016 needing fluorescence capability. Pretty early in that regard.....and of course the 1016 is plan, not a necessary requirement for many viewing situations.

I will look for the socket. Back of my mind says: I have one and you can buy off the shelf led bulbs that fit and work. They are for a 6v. tail light application. Cheap on ebay.

arb566
Posts: 32
Joined: Mon Mar 23, 2020 5:47 am
Location: British Columbia Canada

Re: A.O. bits wanted

#39 Post by arb566 » Wed Jul 15, 2020 5:18 pm

Thanks Apo,

Good info on the objectives.
currently I have the 1016 50X/iris and the 1311 100x. I've seen the 1079 come up at reasonable prices but I think long term The 1014 100X/iris will be the way to go, it's on the wishlist. I agree the ability to back off from the 100X to a 50 without a cleanup is a very practical feature. The ability to use the 1026 50X dry would be a bit of a bonus but it will have to stay a ways down on the list for now.
Finding the bulb socket for the 218f would be unexpected and very welcome. I can see them being pulled off the condenser and lost in the shuffle quite easily. Locating one would certainly save a lot of tinkering. As far as the transformer goes the two I use for the 570 stereo (not lucky enough to have the dual unit) are the 3 step clunk. clunk, clunk variety. certainly not ideal so I'll have an eye open for a variable. Pricing on Ebay seems a bit silly especially with shipping to the great white north. I've also wondered if anyone has ever retrofit one of the 3 step units with a proper rheostat?

Again, thanks for the info and advice.

Cheers, Al.

apochronaut
Posts: 3818
Joined: Fri May 15, 2015 12:15 am

Re: A.O. bits wanted

#40 Post by apochronaut » Fri Jul 17, 2020 2:16 am

O.K.. I found a socket for you. There is no cord, well there was but the insulation is all cracked and falling off.

arb566
Posts: 32
Joined: Mon Mar 23, 2020 5:47 am
Location: British Columbia Canada

Re: A.O. bits wanted

#41 Post by arb566 » Fri Jul 17, 2020 3:20 am

If you can save the plug on the end it might simplify a new cord.
Sent you a P.M.

Thanks, Al.

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