Came across this listing for a Leitz EF 10x objective with a "phase contrast insert":
https://www.ebay.com/itm/384310270761?e ... Sw995hCXFu
I don't see how that insert could possibly work for phase contrast. Does anyone know what it really is?
Phase contrast insert for objective?
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Re: Phase contrast insert for objective?
Maybe if you are using an objective as your condenser it works like a darkfield stop
1942 Bausch and Lomb Series T Dynoptic, Custom Illumination
Re: Phase contrast insert for objective?
It can also be used as darkfield objective by itself, with the condenser set at low NA, so direct light get blocked by the stop, only scattered light passes.
Maybe (totally unsure) could work as "inverted phase", paired with a condenser with a phase plate (this stop makes an annulus in the objective; the phase plate is in the condenser; opposite than normal).
Maybe (totally unsure) could work as "inverted phase", paired with a condenser with a phase plate (this stop makes an annulus in the objective; the phase plate is in the condenser; opposite than normal).
Re: Phase contrast insert for objective?
For it to be a Lyot mask, I would have thought it would have to have been an infinity objective, not a fixed length 160.Dubious wrote: ↑Wed Aug 04, 2021 12:12 amCame across this listing for a Leitz EF 10x objective with a "phase contrast insert":
https://www.ebay.com/itm/384310270761?e ... Sw995hCXFu
I don't see how that insert could possibly work for phase contrast. Does anyone know what it really is?
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- Posts: 6327
- Joined: Fri May 15, 2015 12:15 am
Re: Phase contrast insert for objective?
Since this is a 160/- objective, I wonder whether it is a stop designed to be used in an epi application.
The EF objectives were a budget objective with a flat field of only up to 18mm.
The EF objectives were a budget objective with a flat field of only up to 18mm.