Olympus BH-2 question
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- Location: UK
Re: Olympus BH-2 question
I *think* they made a 'plug-in' filter, like the one shown in the pictures. I have no idea what make this is.
This is a blue filter, but can support other discs such as stops.
Of course whether this is the ideal place for such a stop depends on the design of the condenser.
Another forum member also 3-D prints a device that fits these condensers, and is raised further up into the condenser body, so bringing stops nearer the iris.
I am sure he will join the discussion at some point.
This is a blue filter, but can support other discs such as stops.
Of course whether this is the ideal place for such a stop depends on the design of the condenser.
Another forum member also 3-D prints a device that fits these condensers, and is raised further up into the condenser body, so bringing stops nearer the iris.
I am sure he will join the discussion at some point.
Re: Olympus BH-2 question
Something like thus?: http://earth2geologists.net/Microscopes ... bstage.jpg
Found from http://earth2geologists.net/Microscopes ... Scopes.htm
Unless I am missing something, that looks to be the easiest solution. If you have access to a 3D printer, something like that could be whipped up pretty quick.
Edit: If you're brave, you could drill and tap the mount and secure a filter holder directly underneath the condenser to pivot on a bolt threaded into the hole.
Found from http://earth2geologists.net/Microscopes ... Scopes.htm
Unless I am missing something, that looks to be the easiest solution. If you have access to a 3D printer, something like that could be whipped up pretty quick.
Edit: If you're brave, you could drill and tap the mount and secure a filter holder directly underneath the condenser to pivot on a bolt threaded into the hole.
Re: Olympus BH-2 question
David asked me this question through another channel ...photomicro wrote: ↑Wed Apr 22, 2020 11:22 am...Another forum member also 3-D prints a device that fits these condensers, and is raised further up into the condenser body, so bringing stops nearer the iris. I am sure he will join the discussion at some point....
Initially I answered, no, nothing will keep insert inside because of the conical shape. Even simplified insert (no magnets, flat base) will not help - condenser base is hanging in the air...
But...morning is smarter than evening - I have very thin big size steel washers (bought for the initial testing), if they are right size, they can be glued (double tape) to the base of the condenser, and my type insert (has to be designed for this condenser) can be attached to this condenser. If it sounds logical, I need some exact dimensions in mm, at least one number after coma (attached) and distance between bases of the cone (not along the side wall but perpendicular):
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Re: Olympus BH-2 question
Good information, thank you.dtsh wrote: ↑Wed Apr 22, 2020 2:55 pmSomething like thus?: http://earth2geologists.net/Microscopes ... bstage.jpg
Found from http://earth2geologists.net/Microscopes ... Scopes.htm
Unless I am missing something, that looks to be the easiest solution. If you have access to a 3D printer, something like that could be whipped up pretty quick.
Edit: If you're brave, you could drill and tap the mount and secure a filter holder directly underneath the condenser to pivot on a bolt threaded into the hole.
Re: Olympus BH-2 question
Three other options:
1) Recollection is that the dovetail base of the condenser comes off with a few screws. Can't recall if extra care is required to keep the iris leaves in place as it's removed - replacing those requires a bit of patience. Anyhow once off, the inside can easily be machined, parts can be epoxied on, etc. For example, I've modified some Olympus condesers to fit and try DIC prisms up inside as close to the iris plane as possible.
2) Another possibility for darkfield is to be on the lookout for a proper darkfield or olique condenser and fit it to the BH2. A Loma oblique, for example, ended up OK on a BH2.
3) You can also support something from the base of the BH2, perhaps made of camera extensions and adapters to get just below the condenser height.
1) Recollection is that the dovetail base of the condenser comes off with a few screws. Can't recall if extra care is required to keep the iris leaves in place as it's removed - replacing those requires a bit of patience. Anyhow once off, the inside can easily be machined, parts can be epoxied on, etc. For example, I've modified some Olympus condesers to fit and try DIC prisms up inside as close to the iris plane as possible.
2) Another possibility for darkfield is to be on the lookout for a proper darkfield or olique condenser and fit it to the BH2. A Loma oblique, for example, ended up OK on a BH2.
3) You can also support something from the base of the BH2, perhaps made of camera extensions and adapters to get just below the condenser height.
Re: Olympus BH-2 question
Thanks I'll measure up and send you a PM.Saul wrote: ↑Wed Apr 22, 2020 4:46 pmDavid asked me this question through another channel ...
Initially I answered, no, nothing will keep insert inside because of the conical shape. Even simplified insert (no magnets, flat base) will not help - condenser base is hanging in the air...
But...morning is smarter than evening - I have very thin big size steel washers (bought for the initial testing), if they are right size, they can be glued (double tape) to the base of the condenser, and my type insert (has to be designed for this condenser) can be attached to this condenser. If it sounds logical, I need some exact dimensions in mm, at least one number after coma (attached) and distance between bases of the cone (not along the side wall but perpendicular):
Re: Olympus BH-2 question
Thank you, 3) sounds like the easiest option.PeteM wrote: ↑Wed Apr 22, 2020 7:48 pmThree other options:
1) Recollection is that the dovetail base of the condenser comes off with a few screws. Can't recall if extra care is required to keep the iris leaves in place as it's removed - replacing those requires a bit of patience. Anyhow once off, the inside can easily be machined, parts can be epoxied on, etc. For example, I've modified some Olympus condesers to fit and try DIC prisms up inside as close to the iris plane as possible.
2) Another possibility for darkfield is to be on the lookout for a proper darkfield or olique condenser and fit it to the BH2. A Loma oblique, for example, ended up OK on a BH2.
3) You can also support something from the base of the BH2, perhaps made of camera extensions and adapters to get just below the condenser height.
Alternatively, it looks like this type of BH-2 condenser could be adapted and is relatively inexpensive. Is it any good?
Re: Olympus BH-2 question
The Olympus 1.25 na condenser isn't bad. But your .90 na Achro condenser is better color corrected and better able (with the top lens flipped out) to fully cover the field of a 4x objective.
Re: Olympus BH-2 question
For the BH2:
https://drive.google.com/file/d/14VRljG ... sp=sharing
https://drive.google.com/file/d/1mq5xgw ... sp=sharing
Carl
https://drive.google.com/file/d/14VRljG ... sp=sharing
https://drive.google.com/file/d/1mq5xgw ... sp=sharing
Carl
--- If you're in the Kansas City area and you need help with an Olympus BH-2 scope, PM me. I love to work on these things ---