Sky & Telescope - September 2022 - 68
S&T Test Report by Alan Dyer
Sky-Watcher's Evolux 82ED Refractor
We test one of a new series of entry-level apochromatic refractors.
t With its optional 0.9× reducer/corrector, the
Evolux 82ED yields a 4.3° by 2.8° field on a
full-frame sensor. This stack of 20 eight-minute
exposures with a Canon EOS Ra camera shows
residual chromatic aberration and a lens flare
from Deneb just off the right edge of the frame.
The Evolux Series
For several years, Sky-Watcher has
offered two lines of apo refractors:
the entry-level EvoStar series, which
features lower-cost doublet lenses, and
the premium Esprit series with triplet
lenses employing Ohara FPL-53 glass.
I reviewed the superb Esprit 100 in the
October 2014 issue (page 62). But we
haven't seen many new apo designs
from Sky-Watcher since.
That is, until now. Its new Evolux
Evolux 82ED
U.S. Price: $915
skywatcherusa.com
What We Like
Optics with low chromatic
aberration
Excellent corner sharpness
with optional reducer/corrector
Extra-long dew shield
What We Don't Like
Defective focuser
Crude camera rotation
mechanism
The Evolux 82ED
is finished in SkyWatcher's
distinctive
green accented
livery and is shown
here equipped for
visual use, with its
2-inch back, plus the
included Vixen-standard
dovetail bar and
two finder shoes on
the tube cradle.
68 SEPTEMBER 2022 * SKY & TELESCOPE
I THINK IT'S FAIR to say that telescopes
from Synta's Sky-Watcher brand
have helped to democratize the use of
apochromatic, or color-free, refractors.
Compared to the lofty price of $1,000
per inch (or much more) typical of prestige
brands, Sky-Watcher's affordable
offerings made apos accessible to more
buyers. So, when Sky-Watcher introduces
a new series of apos, that's news
worth noting.
series currently includes two models:
a 62-mm (2.4-inch) and an 82-mm,
both doublets, said to improve upon
the long-popular EvoStar series by using
newer glass and a new optical design.
However, the type of glass employed isn't
disclosed, other than being extra-low
dispersion (ED). This new design allows
the Evolux telescopes to have f/6.45 focal
ratios, compared to the photographically
slower f/7.5 to f/9 focal ratios of most of
the older EvoStar models.
I tested a new Evolux 82ED, on loan
from Sky-Watcher USA. The sample sent
had obviously been used as it had some
cosmetic blemishes. A matching 0.9×
reducer/corrector lens was also provided.
ALL PHOTOS COURTESY OF AUTHOR
http://www.skywatcherusa.com
Sky & Telescope - September 2022
Table of Contents for the Digital Edition of Sky & Telescope - September 2022
Contents
Sky & Telescope - September 2022 - Cover1
Sky & Telescope - September 2022 - Cover2
Sky & Telescope - September 2022 - 1
Sky & Telescope - September 2022 - Contents
Sky & Telescope - September 2022 - 3
Sky & Telescope - September 2022 - 4
Sky & Telescope - September 2022 - 5
Sky & Telescope - September 2022 - 6
Sky & Telescope - September 2022 - 7
Sky & Telescope - September 2022 - 8
Sky & Telescope - September 2022 - 9
Sky & Telescope - September 2022 - 10
Sky & Telescope - September 2022 - 11
Sky & Telescope - September 2022 - 12
Sky & Telescope - September 2022 - 13
Sky & Telescope - September 2022 - 14
Sky & Telescope - September 2022 - 15
Sky & Telescope - September 2022 - 16
Sky & Telescope - September 2022 - 17
Sky & Telescope - September 2022 - 18
Sky & Telescope - September 2022 - 19
Sky & Telescope - September 2022 - 20
Sky & Telescope - September 2022 - 21
Sky & Telescope - September 2022 - 22
Sky & Telescope - September 2022 - 23
Sky & Telescope - September 2022 - 24
Sky & Telescope - September 2022 - 25
Sky & Telescope - September 2022 - 26
Sky & Telescope - September 2022 - 27
Sky & Telescope - September 2022 - 28
Sky & Telescope - September 2022 - 29
Sky & Telescope - September 2022 - 30
Sky & Telescope - September 2022 - 31
Sky & Telescope - September 2022 - 32
Sky & Telescope - September 2022 - 33
Sky & Telescope - September 2022 - 34
Sky & Telescope - September 2022 - 35
Sky & Telescope - September 2022 - 36
Sky & Telescope - September 2022 - 37
Sky & Telescope - September 2022 - 38
Sky & Telescope - September 2022 - 39
Sky & Telescope - September 2022 - 40
Sky & Telescope - September 2022 - 41
Sky & Telescope - September 2022 - 42
Sky & Telescope - September 2022 - 43
Sky & Telescope - September 2022 - 44
Sky & Telescope - September 2022 - 45
Sky & Telescope - September 2022 - 46
Sky & Telescope - September 2022 - 47
Sky & Telescope - September 2022 - 48
Sky & Telescope - September 2022 - 49
Sky & Telescope - September 2022 - 50
Sky & Telescope - September 2022 - 51
Sky & Telescope - September 2022 - 52
Sky & Telescope - September 2022 - 53
Sky & Telescope - September 2022 - 54
Sky & Telescope - September 2022 - 55
Sky & Telescope - September 2022 - 56
Sky & Telescope - September 2022 - 57
Sky & Telescope - September 2022 - 58
Sky & Telescope - September 2022 - 59
Sky & Telescope - September 2022 - 60
Sky & Telescope - September 2022 - 61
Sky & Telescope - September 2022 - 62
Sky & Telescope - September 2022 - 63
Sky & Telescope - September 2022 - 64
Sky & Telescope - September 2022 - 65
Sky & Telescope - September 2022 - 66
Sky & Telescope - September 2022 - 67
Sky & Telescope - September 2022 - 68
Sky & Telescope - September 2022 - 69
Sky & Telescope - September 2022 - 70
Sky & Telescope - September 2022 - 71
Sky & Telescope - September 2022 - 72
Sky & Telescope - September 2022 - 73
Sky & Telescope - September 2022 - 74
Sky & Telescope - September 2022 - 75
Sky & Telescope - September 2022 - 76
Sky & Telescope - September 2022 - 77
Sky & Telescope - September 2022 - 78
Sky & Telescope - September 2022 - 79
Sky & Telescope - September 2022 - 80
Sky & Telescope - September 2022 - 81
Sky & Telescope - September 2022 - 82
Sky & Telescope - September 2022 - 83
Sky & Telescope - September 2022 - 84
Sky & Telescope - September 2022 - Cover3
Sky & Telescope - September 2022 - Cover4
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