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4 Binocular Observing Report



4 Binocular Observing Report

By Ed Zarenski (EZarenski@GilbaneCo.com)

This is a list of the objects viewed for detail during the hours of comparing the Orion Ultraview 10 x 50, the Oberwerk 15 x 70 and the Orion Giant 16 x 80. This list is referenced from the article I have written comparing these binoculars.

Some of the objects were viewed as pairs or groups. For those, the size of the individual objects is listed and the overall separation of the group is noted. M42/M43/1980/1981, M16/M17/M18 and M36/M37/M38-the Auriga Clusters are perfect examples of areas that take on a different but pleasing appearance when viewed in the perspective of the surrounding objects.

I have found much pleasure some nights in simply sitting back in a lawn chair and scanning areas of the sky. Whether it's to re-orient to an area of the sky I haven't seen in six months or to scan an area with which I am currently familiar, I always find myself exclaiming, Wow! What's that! It always helps me find my way around the next time I'm back at the scope.

I was surprised at the level of detail that was recorded using the larger binoculars, especially the close double stars that could be resolved. Also, I was surprised at the faint objects I could see with my Orion 10x50 Ultraviews. Some of the galaxies recorded with the 10x50's were viewed while on a July 2001 camping trip in the White Mountains at an elevation of near 4000'. There are many more viewings listed for the 10x50's as I have been using them much longer and developed portions of this list based on data I had recorded previously using the 10x50's.

With few exceptions, all these objects were viewed with the binoculars tripod mounted. Although I do not have a parallel bino-mount, I do have several tall stable tripods and I was able to comfortably sit on a bar stool to view. Also I have an Orion Precision Slow-Motion Adapter that I found to be very useful for binocular viewing.

There were a number of objects viewed with the 15x70's that have no successful recorded sighting using the 16x80's. I am sure the 80's would have seen everything found using the 70's, however this resulted from having the 70's out on one of those nights of perfect seeing and then not getting another night like that over the remaining several weeks that I had the 80's. Try as hard as you wish, without transparent skies you will not see faint objects.

Manufacturers Specifications and Measurements

7 x 35 Minolta Standard XL Wide Angle 9.3*
10 x 50 Orion Ultraview Close Focus 6.5*
15 x 70 Oberwerk Long Eye Relief 4.4*
16 x 80 Orion Giant 3.5*

no entry = no try no entry = no try no entry = no try
name con mag size 7 x 35 10 x 50 15 x 70 16 x 80
24 v dbl Dra 4.9-4.9 62" easy handheld braced wide handheld very wide handheld very wide
10 B dbl Lyr 3.4-8.6 46" handheld braced easy big mag diff. very wide
7,6,z dbl Lyr 4.3-5.9 44" seen handheld braced easy very wide
B Alberio dbl Cyg 3.1-5.1 34" seen mounted yellow-blue handheld no color very easy very wide brilliant white-nice blue
7 k dbl Her 5.3-6.5 28".4 elongated suspected easy close nice easy white-white wide easy clear white - blue
61 dbl Oph 6.0-6.5 21" very very close easy very easy clearly
24 dbl Com 5.2-6.7 20".3 seen
E2259 dbl Her 7.3-8.3 19".6 NO suspected confirmed
12:00 AM dbl CVn 2.9-5.5 19".4 NO NO with difficulty
Polaris dbl Umi 2.0-9.0 18" NO NO NO
65 d dbl Her 3.0-8.5 15" NO NO
79 Mizar dbl Uma 2.3-4.0 14".4 NO elongated strongly suspected
100 dbl Her 5.9-6.0 14".2 elongated suspected close clean split very clearly split
E2474 dbl Lyr 6.7-8.8 16".2 with difficulty clearly split
E2470 dbl Lyr 6.6-8.6 13".4 NO elongated suspected
M3 gc CVn 6.4 16' seen very brite
M5 gc Ser 5.8 17' seen handheld brite briter core faint outer
M10 gc Oph 6.6 15' faint shows a core fairly brite
M12 gc Oph 6.6 14' barely seen stands out has even glow fairly brite
M13 gc Her 5.9 17' small faint glow small evenly brite + faint grey large object brite core faint extension large brite core dimmer outer glow
M71 gc Sge 8.3 7' NO faint difficult faint
M92 gc Her 6.5 11' seen handheld
M22 gc Sag 5.2 24’ prominent
M27 Dumbell pn Vul 7.3 8'x6' seen handheld brite rectangular brite large rectangular
M57 Ring pn Lyr 9.7 90"x60" NO starlike starlike
M29 oc Cyg 50*m8.6+ 7' seen small but distinct see 6 stars
457 Owl oc Cas 80*m8+ 13' see eyes of the Owl
M11 oc Ser 150*m11+ 14' faint patch faint star see glow w faint * glow w embedded faint * below
M51 eg CnV 8.4m sf.br.13.0 11'x8' very faint no shape also seen handheld faint N-S pear shaped S brighter larger faint easier see shape S brighter
5195 eg CnV 9.6 5'x4' seen with M51 seen with M51 dimmer and smaller
M106 eg CVn 8.3 18'x8' seen brite found appears brighter
M101 eg Uma 7.9m sf.br.14.7 27' NO avert very faint glow sighted off-axis while moving NO tried but haze prevented
6940 oc Vul 60*m9.3+ 30' large very faint *
2264 oc Mon 40*m3.9+ 35'x15 distinct xmas tree
M81 eg Uma 6.9 sb13.1 15'x7' seen handheld broad w/starlike core w/foreground stars NO tried but haze
M82 eg Uma 8.7 sb12.5 9'x4' sep 45 seen handheld long narrow NE-SW NO tried but haze
IC4665 oc Ser 30*m6.9+ 41' seen 20* nice field 28* 31* in field several very faint
IC4756 oc Oph 75*m7.5+ 52' faint glow broad no stars seen less stand out all faint many stand out too many to count
St1 oc Vul 50*m8+ 60' loose br * better than in scope at 2*fov
St2 oc Per 50*m8+ 60' seen - wide open *
CR399 oc 40*m5+ 60' handheld better than scope @ 30x
M33 eg Tri 5.7m sf.br.14.1 62'x39 found for 1st time very large faint
869 - 884 oc Per 200*m7+ 150*m8+ 30' 30' sep70' large needs hi power
M7 oc Sco 80*m5.6+ 80' easy sight brite *
M46 - M47 oc Pup 100*m9+ 30*m5.7+ 27' 30' sep90' M47 easy brite * M46 very faint fuzzy spot
M39 - 7082 oc Cyg 30*m6.8+ m9.9+ 32' 25' sep90' M39 seen nice pair fairly close large area of br *
M44 oc Cnc 50*m6.3+ 90' easy sight large brite stars
Ikeya Zhang com very large with extension upward
M45 oc Tau 100*m3+ 110' easy sight pretty sight more faint * counted 51*
1981 1980 M43 M42 oc neb Ori 20*m6.3+ BN14' BN20' BN66' sep120 easy sight favorite at group sessions
Glx Clstr eg Vir cluster seebelow sep180 several seen only on dark clear nights NO too low to horizon
M84 eg Vir 9.3sb12.6 5'x4' seen
M86 eg Vir 9.2sb13.2 7'x6' seen
M87 eg Vir 8.6sb12.9 7'x7' seen
M60 eg Vir 8.8sb12.9 7'x6' seen
M24 sf Sag 150' outstanding thick cloud like a globular
M20 - M8 dif neb Sag 30'90' sep180 see brite nebula
M16 - M17 - M18 oc dif neb Ser Sgr Sgr 35' 46' 9' sep220 open clus and neb glow better than telescope
Mel111 oc Com 80*m4.4+ 275' easy sight very wide sparse nice fit clear image can't get all in fov outer edge blurred
M37 - M36 - M38 oc Aur 150*m9+ 60*m9+ 100*m10+ 20'12' 20' sep360 impressive clusters sprinkled across wide area
M35 oc Gem 200*m8+ 28' seen with Aur group
M31 M32 eg And 3.5m 8.2m 280' 7' easy sight favorite at group sessions saw M31 3* to 4* on a naked eye night
Hyades oc Tau 330' easy sight best in binocs many doubles
M.W. sf Cyg vast hundreds so many stars has faint glow glow takes on shades of brite but narrow
LEGEND 50*m8.6+ = 50 stars mag 8.6 up
sf.br.14.7 = surface brightness 14.7mag
35' 40' 46' sep240' individual diameters total seperation




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