Basic Data
| Maker: | Unsigned |
| Date (year): | 1800 |
| Description: | |
| Signature: | |
| Collection: | Adler |
| Accession #: | M-443 |
| Style: | spyglass |
| Objective type: | singlet |
| Notes: | |
Objective Data
| Lens 1 |
| CA curvature (diopters): |
2.675 |
| CB curvature (diopters): |
-3.858 |
| PD lens power (diopters): |
3.431 |
| fD focal length (mm): |
291.5 |
| t thickness (mm): |
5.1 |
| d free aperture (mm): |
69.4 |
| nD refractive index: |
1.526 |
| ν Abbe No.: |
|
Eyepiece Data
| No. of eyepiece elements: | 0 |
(elements of one eyepiece) |
| Complete |
| fD focal length (mm): |
|
| d diameter (mm): |
|
| s spacing (mm): |
|
| CA curvature (diopters): |
|
| CB curvature (diopters): |
|
| M magnification: |
|
| FOV field of view (degrees): |
|
This entry, number 70, was created on 2006-08-14 16:40:53 and last modified on 2006-08-14 16:40:53.
