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The APM 100 mm 45° Semi-APO is a large-aperture binocular telescope for both astronomy and daytime nature viewing. Each side uses a two-element semi-apochromatic objective of 100 mm aperture and 550 mm focal length made from special glass for a high-contrast image, feeding BaK-4 prisms and a 45° angled viewing head.
Rather than a fixed power, it takes standard 1.25" eyepieces, so magnification can be changed to suit the target – from wide star fields to close lunar detail. The nitrogen-filled die-cast magnesium body is weatherproof, and it is supplied with a pair of APM UF 18 mm eyepieces, a carry handle and a photo tripod adapter.
Key Features
- Semi-apochromatic optics – two-element 100 mm objectives in special glass deliver a high-contrast image.
- Interchangeable eyepieces – universal 1.25" eyepiece holders let you vary the magnification by swapping eyepieces.
- Individual helical focusing – each eyepiece focuses independently for precise sharpness in both eyes.
- BaK-4 prisms and multi-coating – 28 mm BaK-4 prisms with hard broadband multi-coated optical surfaces.
- Weatherproof magnesium body – die-cast magnesium housing is nitrogen filled to keep moisture out.
- Extendable dew shields – slide-out dew caps help prevent fogging on long sessions and act as side-light shades by day.
- Tripod ready – photo tripod connection plus a sturdy carry handle for transport and mounting.
Specifications
| Brand | APM |
| Part number | APMSA100BINO45 |
| Objective diameter | 100 mm |
| Viewing angle | 45° |
| Focal length | 550 mm |
| Objective lens elements | 2 per side (semi-apochromatic) |
| Prism type | BaK-4 |
| Prism size | 28 mm |
| Coatings | Hard broadband multi-coating |
| Eyepiece holder | 1.25" (31.7 mm) clamp |
| Focusing | Individual helical eyepiece focusers |
| Maximum true field of view | 2.8° |
| Field stop diameter | 28 mm |
| Interpupillary distance | 54–75 mm |
| Housing | Die-cast magnesium, nitrogen filled, weatherproof |
| Tripod thread | 1/4" and 3/8" |
| Dew shield internal thread | M116 x 1, 6 mm deep |
| Dimensions | 540 x 270 x 160 mm |
| Weight | 6.6 kg |
In the Box
- APM 100 mm Semi-APO binocular, 45°
- Carry handle and photo tripod adapter
- Objective and eyepiece caps
- Pair of APM UF 18 mm eyepieces
- Packaging box
