Sky & Telescope - June 2023 - 69
film photography and manual tracking.
It was certainly a photo that any
beginning astrophotographer would be
happy with.
I then went on to a few other objects
that night. With the very first 10-second
exposure, the Double Cluster in
Perseus looked much like the eyepiece
view through a larger telescope. The gibbous
Moon was up, so I slewed over to
see how the scope performed on its cratered
landscape. The first image wasn't
quite in focus, so I slewed to the target
again, which forces the device to also
refocus, and after a minute the little
scope produced a sharper lunar portrait.
Sharper, but not really sharp. The image
looked fine on my smartphone screen,
but when I zoomed in, it was still rather
soft. This is where the Vespera's limited
50-mm aperture and 200-mm focal
length become apparent. Focus with
the Moon was inconsistent and never
very satisfying. And while it's good news
that the Vespera is the first smart telescope
that can automatically find and
image the Sun (with the supplied solar
filter), the images were not particularly
impressive, and focus was a hit-or-miss
endeavor, requiring re-targeting the Sun
several times until I got an acceptably
focused picture.
Fainter deep-sky objects weren't
visible on the screen until Vespera had
combined several images. The manufacturer
offers several filter accessories for
the Vespera. Unlike the Stellina, which
claimed to have some form of built-in
light-pollution correction, the Vespera
requires adding the optional, $199
Vespera Light Pollution (or City Light
Suppression) Filter to get better results
under suburban conditions. I tried the
filter on moonlit nights, and it seemed
to improve the views. Also available is
a Dual Band Filter ($399) that passes
both hydrogen-alpha and oxygen III
wavelengths.
With the CLS filter in place, I got
a decent color image of NGC 6888,
the Crescent Nebula in Cygnus, after
about 30 minutes. On another moonless
night, I captured a nice image of
B33, the Horsehead Nebula in Orion,
without needing a filter.
Users can expand the field of view covered by the Vespera's detector by selecting the Mosaic
button to the right of the Observe button. This opens a screen with a map of your field of view.
Simply drag the brackets away from your target to expand the field. The resulting mosaic of M31
(left) covers almost three times as much area as a single pointing.
The Vespera diligently shot this 1-hour mosaic of NGC 1499 in Perseus while the author
was observing with another telescope nearby.
sk yand tele scope .o r g * JUNE 2023 69
https://skyandtelescope.org/
Sky & Telescope - June 2023
Table of Contents for the Digital Edition of Sky & Telescope - June 2023
Contents
Sky & Telescope - June 2023 - Cover1
Sky & Telescope - June 2023 - Cover2
Sky & Telescope - June 2023 - 1
Sky & Telescope - June 2023 - Contents
Sky & Telescope - June 2023 - 3
Sky & Telescope - June 2023 - 4
Sky & Telescope - June 2023 - 5
Sky & Telescope - June 2023 - 6
Sky & Telescope - June 2023 - 7
Sky & Telescope - June 2023 - 8
Sky & Telescope - June 2023 - 9
Sky & Telescope - June 2023 - 10
Sky & Telescope - June 2023 - 11
Sky & Telescope - June 2023 - 12
Sky & Telescope - June 2023 - 13
Sky & Telescope - June 2023 - 14
Sky & Telescope - June 2023 - 15
Sky & Telescope - June 2023 - 16
Sky & Telescope - June 2023 - 17
Sky & Telescope - June 2023 - 18
Sky & Telescope - June 2023 - 19
Sky & Telescope - June 2023 - 20
Sky & Telescope - June 2023 - 21
Sky & Telescope - June 2023 - 22
Sky & Telescope - June 2023 - 23
Sky & Telescope - June 2023 - 24
Sky & Telescope - June 2023 - 25
Sky & Telescope - June 2023 - 26
Sky & Telescope - June 2023 - 27
Sky & Telescope - June 2023 - 28
Sky & Telescope - June 2023 - 29
Sky & Telescope - June 2023 - 30
Sky & Telescope - June 2023 - 31
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Sky & Telescope - June 2023 - 33
Sky & Telescope - June 2023 - 34
Sky & Telescope - June 2023 - 35
Sky & Telescope - June 2023 - 36
Sky & Telescope - June 2023 - 37
Sky & Telescope - June 2023 - 38
Sky & Telescope - June 2023 - 39
Sky & Telescope - June 2023 - 40
Sky & Telescope - June 2023 - 41
Sky & Telescope - June 2023 - 42
Sky & Telescope - June 2023 - 43
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Sky & Telescope - June 2023 - 45
Sky & Telescope - June 2023 - 46
Sky & Telescope - June 2023 - 47
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Sky & Telescope - June 2023 - 49
Sky & Telescope - June 2023 - 50
Sky & Telescope - June 2023 - 51
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Sky & Telescope - June 2023 - 54
Sky & Telescope - June 2023 - 55
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Sky & Telescope - June 2023 - 66
Sky & Telescope - June 2023 - 67
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Sky & Telescope - June 2023 - 69
Sky & Telescope - June 2023 - 70
Sky & Telescope - June 2023 - 71
Sky & Telescope - June 2023 - 72
Sky & Telescope - June 2023 - 73
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Sky & Telescope - June 2023 - 80
Sky & Telescope - June 2023 - 81
Sky & Telescope - June 2023 - 82
Sky & Telescope - June 2023 - 83
Sky & Telescope - June 2023 - 84
Sky & Telescope - June 2023 - Cover3
Sky & Telescope - June 2023 - Cover4
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