Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
I am primarily looking for cat 265, the 2x barlow. I need the lens elements to be in good shape, but the housing doesn't matter - even the threads can be mangled as it will be disassembled to be put into a custom made swing out barlow.
I'd be interested in offers of other objective/barlows too, such as the 0.5x or 2/3x. As these are for use I'm far less concerned about appearance than I am performance, not that appearance isn't nice.
I'd be interested in offers of other objective/barlows too, such as the 0.5x or 2/3x. As these are for use I'm far less concerned about appearance than I am performance, not that appearance isn't nice.
Last edited by dtsh on Tue Jul 14, 2020 9:00 pm, edited 1 time in total.
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Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
I'm curious about your swing out idea. Zeiss had an objective changer on the OMPI surgical microscope but I don't think it was a big hit. I think it held three or four objectives.
I had an Oculus inverter on my OPMI which had a device that allowed for an auxiliary objective to easy swing in and out. It also had another smaller lens for even more magnification which was focused via a micromotor. It was really neat but an expensive toy to keep around so I don't have it to show you but you can see it in the link below. A very well made piece of equipment that might give you some ideas!
https://www.ebay.com/itm/Oculus-BIOM-II ... Sw91teXwRS
More on the Oculus site,
https://www.oculussurgical.com/us/produ ... highlights
Kirby
I had an Oculus inverter on my OPMI which had a device that allowed for an auxiliary objective to easy swing in and out. It also had another smaller lens for even more magnification which was focused via a micromotor. It was really neat but an expensive toy to keep around so I don't have it to show you but you can see it in the link below. A very well made piece of equipment that might give you some ideas!
https://www.ebay.com/itm/Oculus-BIOM-II ... Sw91teXwRS
More on the Oculus site,
https://www.oculussurgical.com/us/produ ... highlights
Kirby
Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
The Oculus is pretty interesting, I have a couple of approaches to try, none quite that complicated thankfully.
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Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
I hope you will share it when it's done!
Kirby
Kirby
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Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
swing-out auxes and full objective changers are mechanically pretty simple and do a lot to increase the capabilities of a scope, but nowadays tend to be limited to high end scopes. It might be because they're a bit cumbersome to use (not so much for hardened scopeheads like us though), but more likely the big four would rather sell you something with a higher zoom range than make a cheaper scope more capable--it's only at the high end where optical limitations demand multiple objectives for better performance, and even there they also push the zoom range as far as they can.
Which is a roundabout way of saying they're a really nice way of improving your scope's performance and in principle not too hard to DIY. There are a few good approaches to the problem. One easier one might be to adapt a lens turret off of an enlarger rig:
It might seem like cheating but it would still be a legitimate challenge to figure out how to connect everything.
Camera polarizers used to have a swing-out option too, which might form a reasonable basis for one.
But it sounds like you already have something in mind (so I'm mostly rambling because it's something I've thought about a lot off and on). I'll look forward to seeing how your project goes! Make sure to post about it.
Which is a roundabout way of saying they're a really nice way of improving your scope's performance and in principle not too hard to DIY. There are a few good approaches to the problem. One easier one might be to adapt a lens turret off of an enlarger rig:
It might seem like cheating but it would still be a legitimate challenge to figure out how to connect everything.
Camera polarizers used to have a swing-out option too, which might form a reasonable basis for one.
But it sounds like you already have something in mind (so I'm mostly rambling because it's something I've thought about a lot off and on). I'll look forward to seeing how your project goes! Make sure to post about it.
Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
My initial toughts have been to design it much like the original 2x swingout. From what I can tell it looks to slide over the objective with the lens in a thinner section which pivots on a rod. Guessing said rod likely threads into the main housing, but many ways one can do it.
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Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
What do you do about Illumination? For what I'm picturing a ring light is problematic but certainly not the only possibility. My OPMI and Stemi have an internal light that shines through the objective but IMO neither are ideal.
Kirby
Kirby
Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)
I have a dual LED gooseneck I use for illumination; sometimes I will stick one of them through the opening AO designed for their illuminators, but usually I just point them in from the sides.Element 56 wrote: ↑Tue Jul 14, 2020 2:27 pmWhat do you do about Illumination? For what I'm picturing a ring light is problematic but certainly not the only possibility. My OPMI and Stemi have an internal light that shines through the objective but IMO neither are ideal.
Kirby
Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
In an unexpected twist of events, I managed to find an original swing out barlow. I may pick this back up later and convert my other 2x barlow into a swingout, but for now it's done.
Thanks for the interest everyone.
Thanks for the interest everyone.
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Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
I love it when a plan comes together