This has no relation to me, I just happened to see it on ebay. It's an AO 214F cardioid DF condenser, which has had it's AO dovetail mount removed( two small screws). This makes the condenser useful for a microscope that has a sleeve type condenser mount of 37mm. In the old days, this made these cardioids useful on Bausch & Lomb scopes as well. Perhaps that is why you hardly ever see older B & L cardioids; 95% are paraboloids and AO cardioids are quite common. The AO condensers were cheaper. It will illuminate a field of about 900 um, so should work at 20X with eyepieces of an 18mm f.n. and anything above. As with all oil DF condensers, the higher N.A. objectives will need to have their N.A. reduced somehow. My experience with these condensers is that they need the N.A. to be .85 or lower in order to obtain a nice dark background, so funnel stops or iris diaphragms are necessary for higher resolution imaging.
The price is right. These were 150.00 in 1967!
Cardioid DF condenser
Have a problem finding shops that sell specific materials? Ask here. Are you looking for microscope parts? Do you have anything to offer for sale? Note: this is not a section for external companies to advertise their products.
Message
Author
-
- Posts: 6327
- Joined: Fri May 15, 2015 12:15 am
Return to “For forum members who want to buy and sell equipment”
Jump to
- Important links and infos
- ↳ Welcome to the new forum!
- ↳ Important announcements
- ↳ Some interesting links
- General
- ↳ Introduce yourself
- ↳ My microscope
- ↳ Sandbox
- ↳ About the website, the magazine and this forum
- ↳ Articles and images to be published
- ↳ Off Topic
- Microscopy Forum
- ↳ Pictures and Videos
- ↳ Beginner's corner
- ↳ Illumination Techniques
- ↳ Digital processing
- ↳ Microscopes and optics
- ↳ Microscopy accessories
- ↳ Camera systems and imaging
- ↳ Specimens, samples and slides
- ↳ Morphology and Behavior
- ↳ Collecting microscopes and slides
- ↳ Home-made microscope adaptations
- ↳ Identification help
- ↳ Resources (online, books etc.)
- ↳ For forum members who want to buy and sell equipment
- ↳ Miscellaneous