Click here if you are having trouble logging into the forums
Privacy Policy |
Please read our Terms
of Service | Signup and
Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User
donnw
super member
Reged: 08/03/08
Posts: 166
Loc: Maryland
|
|
I posted a "wanted" ad in the swap and shop for a pair of "Orion Expanse 7x32 Super Wide Angle Binoculars" and have had a similar ad on AM for a few days and didn't get a single bite. I saw the rather detailed report on this one here on CN. They are reported to have a FOV of 14 degrees / 98deg AFOV (ultra wide angle for sure!). Are these hard to come by or ? Can anyone recommend something else that is comparable? Many thanks!
--------------------
Peace & Blessings,
Donn Williams
Member - AAVSO
----------------------------------
Celestron EdgeHD 11 on CGE in SkyShed POD GL5
Meade Lightbridge 12", SN10, LX200 Classic 8", AR5, 314 Brass & ETX125PE
Lunt LS60T/DS, Stellarvue SV102ED, SV80BV, SV80/9D, SV NH2
Cave Astrolla 8", Zeiss Telementor II, Unitron 114, 128, 142
Towa 339, Royal Astro 76/1200, Pentax J80, Borg 100, AT 102-F/11
Goto 105, Various Sears/Tasco/Selsi/Towa 60-80mm's
|
GlennLeDrew
Pooh-Bah
Reged: 06/18/08
Posts: 1269
Loc: Ottawa, Ontario, Canada
|
|
I've measured the AFoV as being 85 degrees, certainly NOT 98! The reason for the seeming discrepancy is the failure of the simple and naive calculation based on the triad of magnification, AFoV and TFoV to account for the particular distortion characteristics of an eyepiece. In any case, the TFoV should be at least close to what's advertised; 13 degrees, certainly.
I owned the forerunner of the Orion Expanse, the now-discontinued Bushnell Xtra-Wide 7X32. It appeared in different livery, but I'm pretty sure the optics are identical all round. I currently use the very same eyepieces in my modified 26X100, in which the optical characteristics are somewhat better matched.
If the 7X32 is unobtainable, you might consider the Carson 8.5X42 (or some similar configuration). The same 85 deg. eyepieces and prism/mirror system will almost certainly be employed.
--------------------
Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces
My Gallery
Mediocre minds discuss people. Good minds discuss events. Great minds discuss ideas.
|
DJB
Carpal Tunnel
Reged: 02/23/05
Posts: 1589
Loc: Lisle NY
|
|
Hi Donn,
I do have one of these, and it is remarkable for its low cost. Note that Kenny's sample was apparently not a good one--you take your chances on a model at this initial cost. Do a search for his review of this model.
Unfortunately, I tried to acquire a second one for backup, but, they had gone out of production at that time. It is not a toy, but it is a reasonably-made VWA binocular.
Good luck in your search, my friend.
Best regards,
Dave.
|
pcad
Carpal Tunnel
Reged: 01/17/05
Posts: 1767
Loc: Connecticut
|
|
Kenny was using my 7x32 for that review. When they were returned I took them apart and found that they have an easy to use prism tilt adustment. Took about 3 minutes to bring them into conditional collimation.
The only Bushnell binocular that still uses the same basic design is the 4x30 X-Tra Wide. There was an earlier 4x21 version that was very similar. Many consider them a "toy" since they are fixed focus, however I belive Glenn knows how to modify them so they do focus.
--------------------
Peter
Telescopes 25 - 318 mm
Binoculars 15 - 88 mm
Microscope 50x - 1000x
Edited by pcad (09/27/09 10:46 AM)
|
Joe Ogiba
Post Laureate
Reged: 02/14/02
Posts: 4066
Loc: NJ USA
|
|
I have a pair and I removed the small eyecups so I could see the full FOV. They have reflections coming off the light colored plastic behind the objectives that cuse flare when looking at bright objects but I think could be painted with flat black paint after unscrewing the objectives.When I need a 7x binocular I mostly use my 7x42 Zeiss FL's that have the widest FOV of all the ultra premium 7x42 roofs. I also have 7x50 Celestron Oceana 7x50 WP-IF/RC and 7x35 wide angle Celestron Birders .
|
KennyJ
Reged: 04/27/03
Posts: 12895
Loc: Lancashire UK
|
|
Yes , it was with many thanks to Peter that I was able to review the sample I did .
Even disregarding the drawbacks I drew readers' attentions to in the less frivolous aspects of the review , to my eyes , the actual useable field of view seemed nothing at all like what is supposed to be a 60% + increase over and above the 8.6 degree TFOV of my Zeiss 7 x 42 .
From memory I would say it appeared more like an increase of about 30% -- and even that is being generous when I consider what is truly " useable " , especially for night sky viewing .
To achieve such an extra wide field , eye relief seems to have been all but disregarded completely -- but then again the same could be said for many older binoculars I've tried over the years .
The word " toy " certainly doesn't apply though -- those things were built like a tank compared to many more modern offerings I've seen !
To be fair , by the time I got to editing that review , it had become more of an exercise in attempting a branch of satire composition than serious review writing , and for the price and novelty factor , I actually think owning one of these 7 x 32s would be an interesting , useful addition to anyone's collection .
Kenny
--------------------
If everyone is thinking the same thing , no-one is thinking - General George S.Patton
Zeiss 7 x 42 BGAT
Captain's Helmsman 7 x 50
Nikon 10 x 42 Superior E
Swift Audubon Kestrel 10 x 50
Helios 15 x 70 Observation
Strathspey 20 x 90
Televue 76 APO
Zeiss 85 Diascope
Helios 102 f5 refractor
Various eyepieces barlows tripods mounts etc.
Panasonic Lumix DMC - TZ5 digital camera
|
pcad
Carpal Tunnel
Reged: 01/17/05
Posts: 1767
Loc: Connecticut
|
|
Hi Kenny,
I wish you could see the difference between the 7x32 I lent you and the Miyauchi 5x32. They both claim a greater than 12 deg TFOV, but the 7x32 is far more immersive than the 5x32 due to its greater AFOV. BTW, I recall people calling the 4x21 (900' fov) a toy, not the 7x32.
I still use the 7x32 for wide field scanning of the night sky.
Donn, I wish you luck finding one of these. If you can't, I'd suggest an older 7x35 with an 11 deg FOV.
--------------------
Peter
Telescopes 25 - 318 mm
Binoculars 15 - 88 mm
Microscope 50x - 1000x
Edited by pcad (09/27/09 04:40 PM)
|
DJB
Carpal Tunnel
Reged: 02/23/05
Posts: 1589
Loc: Lisle NY
|
|
Hi all,
Good responses, and, accurate.
For a dull and black "paint," I still use the KODAK Brushing Lacquer, No. 4, Dull Black. I have three bottles right in here beside me at the moment.
This solution should be applied with reserve. And, it dries very quickly. However, it serves the purpose extremely well, when one requires a dull black reconditioning. FYI.
Best regards,
Dave.
|
|
7 registered and 6 anonymous users are browsing this forum.
Moderator: EdZ
Print Thread
|
Forum Permissions
You cannot start new topics
You cannot reply to topics
HTML is disabled
UBBCode is enabled
|
Thread views: 269
|
|
|
|
|
|
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
