Sky & Telescope - September 2020 - 72

S&T Test Report

p Using an Optolong L-Enhance filter (reviewed in the May issue, page 70) brought out faint nebulosity in this blend of six 8-minute frames at ISO 1600
with the filter and six 5-minute exposures at ISO 800 without the filter. Additional 30- and 60-second unfiltered exposures at ISO 400 added the bright
core region. All were captured with a Canon EOS Ra.

such as the Celestron AVX, Sky-Watcher
HEQ5, or iOptron CEM25.
All the tube ﬁttings are dressed in a
beautiful red anodized ﬁnish, a color
popular these days with many brands
of mounts and accessories. The HNT

looks superb and is sure to catch the
eye of admirers on the observing ﬁeld.
An included foam-lined and metaltrimmed travel case makes it easy to
transport to dark sites.
Adding to the polished ﬁnish is the
carbon-ﬁber tube. It not only looks
good but helped signiﬁcantly to stabilize
focus. On sub-freezing winter nights,
once the scope had settled down from
being in the warm house, I found I
could focus once and not worry about
refocusing over the next two or three
hours of shooting - impressive for such
a fast reﬂector.

Recommendations
Once I sorted out the initial issues of
camera orientation and collimation, I
t Included with the Sharpstar 150 is a solid
storage and traveling case measuring 23½ by
13 by 11½ inches and weighing 11.5 kg (25.4
lbs) with the instrument.

72

SEPTEMBER 2 02 0 * SK Y & TELESCOPE

soon set testing procedures aside and
just used the 150 HNT to take what I
considered some of my best shots of
popular northern winter sky targets,
often using ﬁlters.
The current generation of multiband ﬁ lters really makes nebulae pop
when shooting with one-shot-color and
DSLR cameras, even under dark skies.
On most nights I took ﬁ ltered and
unﬁ ltered shots to blend together later
in processing. The HNT's f/2.8 speed
made it possible to get all the shots
needed for not only one but several
targets each night.
While I've been a fan of apochromatic refractors for decades, this is
a reﬂector astrograph I soon came to
appreciate and enjoy using. I can certainly recommend it.
■ Contributing Editor ALAN DYER can
be contacted through his website at
amazingsky.com.

http://www.amazingsky.com

Sky & Telescope - September 2020

Table of Contents for the Digital Edition of Sky & Telescope - September 2020

Contents
Sky & Telescope - September 2020 - Cover1
Sky & Telescope - September 2020 - Cover2
Sky & Telescope - September 2020 - 1
Sky & Telescope - September 2020 - Contents
Sky & Telescope - September 2020 - 3
Sky & Telescope - September 2020 - 4
Sky & Telescope - September 2020 - 5
Sky & Telescope - September 2020 - 6
Sky & Telescope - September 2020 - 7
Sky & Telescope - September 2020 - 8
Sky & Telescope - September 2020 - 9
Sky & Telescope - September 2020 - 10
Sky & Telescope - September 2020 - 11
Sky & Telescope - September 2020 - 12
Sky & Telescope - September 2020 - 13
Sky & Telescope - September 2020 - 14
Sky & Telescope - September 2020 - 15
Sky & Telescope - September 2020 - 16
Sky & Telescope - September 2020 - 17
Sky & Telescope - September 2020 - 18
Sky & Telescope - September 2020 - 19
Sky & Telescope - September 2020 - 20
Sky & Telescope - September 2020 - 21
Sky & Telescope - September 2020 - 22
Sky & Telescope - September 2020 - 23
Sky & Telescope - September 2020 - 24
Sky & Telescope - September 2020 - 25
Sky & Telescope - September 2020 - 26
Sky & Telescope - September 2020 - 27
Sky & Telescope - September 2020 - 28
Sky & Telescope - September 2020 - 29
Sky & Telescope - September 2020 - 30
Sky & Telescope - September 2020 - 31
Sky & Telescope - September 2020 - 32
Sky & Telescope - September 2020 - 33
Sky & Telescope - September 2020 - 34
Sky & Telescope - September 2020 - 35
Sky & Telescope - September 2020 - 36
Sky & Telescope - September 2020 - 37
Sky & Telescope - September 2020 - 38
Sky & Telescope - September 2020 - 39
Sky & Telescope - September 2020 - 40
Sky & Telescope - September 2020 - 41
Sky & Telescope - September 2020 - 42
Sky & Telescope - September 2020 - 43
Sky & Telescope - September 2020 - 44
Sky & Telescope - September 2020 - 45
Sky & Telescope - September 2020 - 46
Sky & Telescope - September 2020 - 47
Sky & Telescope - September 2020 - 48
Sky & Telescope - September 2020 - 49
Sky & Telescope - September 2020 - 50
Sky & Telescope - September 2020 - 51
Sky & Telescope - September 2020 - 52
Sky & Telescope - September 2020 - 53
Sky & Telescope - September 2020 - 54
Sky & Telescope - September 2020 - 55
Sky & Telescope - September 2020 - 56
Sky & Telescope - September 2020 - 57
Sky & Telescope - September 2020 - 58
Sky & Telescope - September 2020 - 59
Sky & Telescope - September 2020 - 60
Sky & Telescope - September 2020 - 61
Sky & Telescope - September 2020 - 62
Sky & Telescope - September 2020 - 63
Sky & Telescope - September 2020 - 64
Sky & Telescope - September 2020 - 65
Sky & Telescope - September 2020 - 66
Sky & Telescope - September 2020 - 67
Sky & Telescope - September 2020 - 68
Sky & Telescope - September 2020 - 69
Sky & Telescope - September 2020 - 70
Sky & Telescope - September 2020 - 71
Sky & Telescope - September 2020 - 72
Sky & Telescope - September 2020 - 73
Sky & Telescope - September 2020 - 74
Sky & Telescope - September 2020 - 75
Sky & Telescope - September 2020 - 76
Sky & Telescope - September 2020 - 77
Sky & Telescope - September 2020 - 78
Sky & Telescope - September 2020 - 79
Sky & Telescope - September 2020 - 80
Sky & Telescope - September 2020 - 81
Sky & Telescope - September 2020 - 82
Sky & Telescope - September 2020 - 83
Sky & Telescope - September 2020 - 84
Sky & Telescope - September 2020 - Cover3
Sky & Telescope - September 2020 - Cover4
https://www.nxtbook.com/nxtbooks/aas/st_202501
https://www.nxtbook.com/nxtbooks/aas/st_202412
https://www.nxtbook.com/nxtbooks/aas/st_202411
https://www.nxtbook.com/nxtbooks/aas/st_202410
https://www.nxtbook.com/nxtbooks/aas/st_202409
https://www.nxtbook.com/nxtbooks/aas/st_202408
https://www.nxtbook.com/nxtbooks/aas/st_202407
https://www.nxtbook.com/nxtbooks/aas/st_202406
https://www.nxtbook.com/nxtbooks/aas/st_202405
https://www.nxtbook.com/nxtbooks/aas/st_202404_qr
https://www.nxtbook.com/nxtbooks/aas/st_202404
https://www.nxtbook.com/nxtbooks/aas/st_202403
https://www.nxtbook.com/nxtbooks/aas/st_202402
https://www.nxtbook.com/nxtbooks/aas/st_202401_aus
https://www.nxtbook.com/nxtbooks/aas/st_202401
https://www.nxtbook.com/nxtbooks/aas/st_202312_aus
https://www.nxtbook.com/nxtbooks/aas/st_202312
https://www.nxtbook.com/nxtbooks/aas/st_202311
https://www.nxtbook.com/nxtbooks/aas/st_202310
https://www.nxtbook.com/nxtbooks/aas/st_202309
https://www.nxtbook.com/nxtbooks/aas/st_202308
https://www.nxtbook.com/nxtbooks/aas/st_202307
https://www.nxtbook.com/nxtbooks/aas/st_202306
https://www.nxtbook.com/nxtbooks/aas/st_202305
https://www.nxtbook.com/nxtbooks/aas/st_202304
https://www.nxtbook.com/nxtbooks/aas/st_202304_qr
https://www.nxtbook.com/nxtbooks/aas/st_202303
https://www.nxtbook.com/nxtbooks/aas/st_202302
https://www.nxtbook.com/nxtbooks/aas/st_202301
https://www.nxtbook.com/nxtbooks/aas/st_202212
https://www.nxtbook.com/nxtbooks/aas/st_202211
https://www.nxtbook.com/nxtbooks/aas/st_202210
https://www.nxtbook.com/nxtbooks/aas/st_202209
https://www.nxtbook.com/nxtbooks/aas/st_202208
https://www.nxtbook.com/nxtbooks/aas/st_202207
https://www.nxtbook.com/nxtbooks/aas/st_202206
https://www.nxtbook.com/nxtbooks/aas/st_202205
https://www.nxtbook.com/nxtbooks/aas/st_202204
https://www.nxtbook.com/nxtbooks/aas/st_202203
https://www.nxtbook.com/nxtbooks/aas/st_202202
https://www.nxtbook.com/nxtbooks/aas/st_202201
https://www.nxtbook.com/nxtbooks/aas/st_202112
https://www.nxtbook.com/nxtbooks/aas/st_202111
https://www.nxtbook.com/nxtbooks/aas/st_202110
https://www.nxtbook.com/nxtbooks/aas/st_202109
https://www.nxtbook.com/nxtbooks/aas/st_202108
https://www.nxtbook.com/nxtbooks/aas/st_202107
https://www.nxtbook.com/nxtbooks/aas/st_202106
https://www.nxtbook.com/nxtbooks/aas/st_202105
https://www.nxtbook.com/nxtbooks/aas/st_202104
https://www.nxtbook.com/nxtbooks/aas/st_202103
https://www.nxtbook.com/nxtbooks/aas/st_202102
https://www.nxtbook.com/nxtbooks/aas/st_202101
https://www.nxtbook.com/nxtbooks/aas/skywatch_2021
https://www.nxtbook.com/nxtbooks/aas/st_202012
https://www.nxtbook.com/nxtbooks/aas/st_202011
https://www.nxtbook.com/nxtbooks/aas/st_202010
https://www.nxtbook.com/nxtbooks/aas/st_202009
https://www.nxtbook.com/nxtbooks/aas/st_202008
https://www.nxtbook.com/nxtbooks/aas/st_202007
https://www.nxtbook.com/nxtbooks/aas/st_202006
https://www.nxtbook.com/nxtbooks/aas/st_202005
https://www.nxtbook.com/nxtbooks/aas/st_202004
https://www.nxtbook.com/nxtbooks/aas/st_202003
https://www.nxtbook.com/nxtbooks/aas/st_202002
https://www.nxtbook.com/nxtbooks/aas/st_202001
https://www.nxtbook.com/nxtbooks/aas/st_201912
https://www.nxtbook.com/nxtbooks/aas/st_201911
https://www.nxtbook.com/nxtbooks/aas/st_201910
https://www.nxtbook.com/nxtbooks/aas/st_201909
https://www.nxtbook.com/nxtbooks/aas/st_201908
https://www.nxtbook.com/nxtbooks/aas/st_201907
https://www.nxtbook.com/nxtbooks/aas/st_201906
https://www.nxtbook.com/nxtbooks/aas/st_201905
https://www.nxtbook.com/nxtbooks/aas/st_201904
https://www.nxtbook.com/nxtbooks/aas/st_201903
https://www.nxtbook.com/nxtbooks/aas/st_201902
https://www.nxtbook.com/nxtbooks/aas/st_201901
https://www.nxtbook.com/nxtbooks/aas/st_201812
https://www.nxtbook.com/nxtbooks/aas/st_201811
https://www.nxtbook.com/nxtbooks/aas/st_201810
https://www.nxtbook.com/nxtbooks/aas/st_201809
https://www.nxtbook.com/nxtbooks/aas/st_201808
https://www.nxtbook.com/nxtbooks/aas/st_201807
https://www.nxtbook.com/nxtbooks/aas/st_201806
https://www.nxtbook.com/nxtbooks/aas/st_201805
https://www.nxtbook.com/nxtbooks/aas/st_201804
https://www.nxtbook.com/nxtbooks/aas/st_201803
https://www.nxtbook.com/nxtbooks/aas/st_201802
https://www.nxtbook.com/nxtbooks/aas/st_201801
https://www.nxtbook.com/nxtbooks/aas/st_201712
https://www.nxtbook.com/nxtbooks/aas/st_201711
https://www.nxtbook.com/nxtbooks/aas/st_201710
https://www.nxtbook.com/nxtbooks/aas/st_201709
https://www.nxtbook.com/nxtbooks/aas/st_201708
https://www.nxtbook.com/nxtbooks/aas/st_201707
https://www.nxtbook.com/nxtbooks/aas/st_201706
https://www.nxtbook.com/nxtbooks/aas/st_201705
https://www.nxtbook.com/nxtbooks/aas/st_201704
https://www.nxtbook.com/nxtbooks/aas/st_201703
https://www.nxtbook.com/nxtbooks/aas/st_201702
https://www.nxtbook.com/nxtbooks/aas/st_201701
https://www.nxtbook.com/nxtbooks/aas/st_201612
https://www.nxtbook.com/nxtbooks/aas/st_201611
https://www.nxtbook.com/nxtbooks/aas/st_201610
https://www.nxtbook.com/nxtbooks/aas/st_201609
https://www.nxtbook.com/nxtbooks/aas/st_201608
https://www.nxtbook.com/nxtbooks/aas/st_201607
https://www.nxtbook.com/nxtbooks/aas/st_201606
https://www.nxtbook.com/nxtbooks/aas/st_201605
https://www.nxtbook.com/nxtbooks/aas/st_201604
https://www.nxtbook.com/nxtbooks/aas/st_201603
https://www.nxtbook.com/nxtbooks/aas/st_201602
https://www.nxtbook.com/nxtbooks/aas/st_201601
https://www.nxtbook.com/nxtbooks/aas/st_201512
https://www.nxtbook.com/nxtbooks/aas/st_201511
https://www.nxtbook.com/nxtbooks/aas/st_201510
https://www.nxtbook.com/nxtbooks/aas/st_201509
https://www.nxtbook.com/nxtbooks/aas/st_201508
https://www.nxtbook.com/nxtbooks/aas/st_201507
https://www.nxtbook.com/nxtbooks/aas/st_201506
https://www.nxtbook.com/nxtbooks/aas/st_201505
https://www.nxtbook.com/nxtbooks/aas/st_201504
https://www.nxtbook.com/nxtbooks/aas/st_201503
https://www.nxtbook.com/nxtbooks/aas/st_201502
https://www.nxtbook.com/nxtbooks/aas/st_201501
https://www.nxtbook.com/nxtbooks/aas/st_201412
https://www.nxtbook.com/nxtbooks/aas/st_201411
https://www.nxtbook.com/nxtbooks/aas/st_201410
https://www.nxtbook.com/nxtbooks/aas/st_201409
https://www.nxtbook.com/nxtbooks/aas/st_201408
https://www.nxtbook.com/nxtbooks/aas/st_201407
https://www.nxtbook.com/nxtbooks/aas/st_201406
https://www.nxtbook.com/nxtbooks/aas/st_mars
https://www.nxtbook.com/nxtbooks/aas/st_201405
https://www.nxtbook.com/nxtbooks/aas/st_201404
https://www.nxtbook.com/nxtbooks/aas/st_201403
https://www.nxtbook.com/nxtbooks/aas/st_201402
https://www.nxtbook.com/nxtbooks/aas/st_201401
https://www.nxtbook.com/nxtbooks/aas/st_201312
https://www.nxtbook.com/nxtbooks/aas/st_201311
https://www.nxtbook.com/nxtbooks/aas/st_201310
https://www.nxtbook.com/nxtbooks/aas/st_201309
https://www.nxtbook.com/nxtbooks/aas/st_201308
https://www.nxtbook.com/nxtbooks/aas/st_201307
https://www.nxtbook.com/nxtbooks/aas/st_201306
https://www.nxtbook.com/nxtbooks/aas/st_201305
https://www.nxtbook.com/nxtbooks/aas/st_201304
https://www.nxtbook.com/nxtbooks/aas/st_201303
https://www.nxtbook.com/nxtbooks/aas/st_201302
https://www.nxtbook.com/nxtbooks/aas/st_201301
https://www.nxtbook.com/nxtbooks/aas/st_201212
https://www.nxtbook.com/nxtbooks/aas/st_201211
https://www.nxtbook.com/nxtbooks/aas/st_201210
https://www.nxtbook.com/nxtbooks/aas/st_201209
https://www.nxtbook.com/nxtbooks/aas/st_201208
https://www.nxtbook.com/nxtbooks/aas/st_201207
https://www.nxtbook.com/nxtbooks/aas/st_201206
https://www.nxtbook.com/nxtbooks/aas/st_201205
https://www.nxtbook.com/nxtbooks/aas/st_201204
https://www.nxtbook.com/nxtbooks/aas/st_201203
https://www.nxtbook.com/nxtbooks/aas/st_201202
https://www.nxtbook.com/nxtbooks/aas/st_201201
https://www.nxtbook.com/nxtbooks/aas/st_201112
https://www.nxtbook.com/nxtbooks/aas/st_201111
https://www.nxtbook.com/nxtbooks/aas/st_201110
https://www.nxtbook.com/nxtbooks/aas/st_201109
https://www.nxtbook.com/nxtbooks/aas/st_201108
https://www.nxtbook.com/nxtbooks/aas/st_201107
https://www.nxtbook.com/nxtbooks/aas/st_201106
https://www.nxtbook.com/nxtbooks/aas/st_201105
https://www.nxtbook.com/nxtbooks/aas/st_201104
https://www.nxtbook.com/nxtbooks/aas/st_201103
https://www.nxtbook.com/nxtbooks/aas/st_201102
https://www.nxtbook.com/nxtbooks/aas/st_201101
https://www.nxtbook.com/nxtbooks/aas/st_201012
https://www.nxtbook.com/nxtbooks/aas/st_201011
https://www.nxtbook.com/nxtbooks/aas/st_201010
https://www.nxtbook.com/nxtbooks/aas/st_201009
https://www.nxtbook.com/nxtbooks/aas/st_201008
https://www.nxtbook.com/nxtbooks/aas/st_201007
https://www.nxtbook.com/nxtbooks/aas/st_201006
https://www.nxtbook.com/nxtbooks/aas/st_201005
https://www.nxtbook.com/nxtbooks/aas/st_201004
https://www.nxtbook.com/nxtbooks/aas/st_201003
https://www.nxtbook.com/nxtbooks/aas/st_201002
https://www.nxtbook.com/nxtbooks/aas/st_201001
https://www.nxtbookmedia.com