and Chasing Jupiter from my Yard. 
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All my lenses are interchangeable between three of my telescopes, but some work better on some telescope than others.
| H lenses are generic "Huygens" design 0.965" lenses. | | Optical Type: A two-element design using two air-spaced plano-convex lenses.| | Field of View: Very narrow, typically around 25 to 30 degrees. | | - One 20.0mm lens | | - One 12.5mm lens | |SR lenses are generic "Special Ramsden" design 0.965" lenses. | | Optical Type: Uses two simple glass lenses (plano-convex). | | Field of View: Narrow View: around 30 to 45 degrees. | | - One 04.0mm lens | |
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My 0.965" lenses.
| K lenses are BRESSER Kellner design 1.25" lenses. |
| Optical Type: A three-element achromatic design. |
| Field of View: Typically narrow, ranging between 40 and 45 degrees. |
| - One 20.mm lens |
| - One 10.mm lens |
|PL lenses are BRESSER Plossl design 1.25" lenses. |
| Optical Type: A four-element symmetric design. |
| Field of View: Moderately wide, typically around 50 to 52 degrees. |
| - One 09.7mm lens |
| - One 26.0mm lens |
|Barlows |
| - One 3x barlow 1.25" |