01
Askar 50P
A compact 50 mm astrograph for wide views of nebulae, star fields and large clusters.
Aperture
50 mm
Focal length
190 mm (f/3.8)
Mount
ZWO AM3 equatorial
Locations
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Models
4
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02
Askar 60F
A 60 mm flat-field refractor for balanced views of nebulae and star clusters.
Aperture
60 mm
Focal length
408 mm (f/6.8)
Mount
ZWO AM3 equatorial
Locations
03
Askar 71F
A 71 mm flat-field refractor for a closer look at nebulae, clusters and larger galaxies.
Aperture
71 mm
Focal length
490 mm (f/6.9)
Mount
ZWO AM3 equatorial
Locations
04
BRESSER Messier NT-150S/750 + HRCC
A 150 mm Newtonian with a coma corrector for tighter views of galaxies, clusters and compact nebulae.
Aperture
150 mm
Focal length
795 mm (f/5.3) with HRCC
Mount
ZWO AM3 equatorial
Locations
Compare your view of the sky
A wider field fits larger targets and more surrounding stars. A longer focal length frames a smaller area more closely. These calculated fields use the same ZWO ASI533MC Pro camera, so you can compare like for like.
| Telescope | Aperture | Focal length | Field of view | Image scale |
|---|---|---|---|---|
| Askar 50P | 50 mm | 190 mm (f/3.8) | 3.41° × 3.41° | 4.08″/pixel |
| Askar 60F | 60 mm | 408 mm (f/6.8) | 1.59° × 1.59° | 1.90″/pixel |
| Askar 71F | 71 mm | 490 mm (f/6.9) | 1.32° × 1.32° | 1.58″/pixel |
| BRESSER Messier NT-150S/750 + HRCC | 150 mm | 795 mm (f/5.3) with HRCC | 0.82° × 0.82° | 0.98″/pixel |
Image scale describes sampling, not guaranteed sharpness. Atmosphere, focus, tracking, filters and exposure also affect the image. Open a review for the sources and a plain-English explanation.