| Brand | Coatings | Product line | Model | Aperture (Æ’) | Focal range (mm) | Optical Design (Elements / Groups) | Mount | Image Size | Filter size(s) | Serial # | Purchase Price | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Asahi Optical Co. | SMC | Pentax-M | 1:2.8 40mm (Pancake) | Æ’2.8 – 22 | 40 | 5 / 4 | K | 35mm | Front: 49 | 7310541 | $46.37 | Bought with a K1000 camera, and Sigma 28mm lens. |
| Asahi Optical Co. | SMC | Pentax-M | 1:1.4 50mm | Æ’1.4 – 22 | 50 | 7 / 6 | K | 35mm | Front: 49 | 2464542 | $38.92 | Came with Pentax MX camera |
| Asahi Optical Co. | SMC | Pentax-M | 1:1.7 50mm | Æ’1.7 – 22 | 50 | 6 / 5 | K | 35mm | Front: 49 | 7289803 | $42.40 | Part of a bundle with cameras and flashes. |
| Count: 3 | Total Cost: | $127.69 | ||||||||||