Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-01-2018, 00:51   #1
Registered User

Join Date: Jan 2018
Posts: 2
Tamaya Jupiter Sextant

Hi all

New to the Forum.

I've recently developed an interest in celestial navigation and I'd be interested to know if anyone has used/uses a Tamaya Jupiter sextant.

I guess what I most am interested in is if they represent good value, or if it would be wiser to blow the extra $200 on a Spica, or go for the cheaper Astra IIIb.

I'd prefer to buy one instrument that will last for life.
dmwake is offline   Reply With Quote
Old 28-01-2018, 01:42   #2
Registered User

Join Date: Aug 2013
Location: Back in Montt.
Boat: Westerly Sealord
Posts: 8,224
Re: Tamaya Jupiter Sextant

They will all last you for life if cared for....

All things being equal I would buy a Tamaya before the Astra but that's just me.

Differences in the Tamayas here.. https://www.celestaire.com/marine-se...or-detail.html

Have never owned either, just sailed with them.....

Edit... the scopes on the ones you are considering may influence your choice.
__________________
A little bit about Chile can be found here https://www.docdroid.net/bO63FbL/202...anchorages-pdf
El Pinguino is offline   Reply With Quote
Old 28-01-2018, 03:08   #3
Marine Service Provider

Join Date: Dec 2010
Location: Little Compton, RI
Boat: Cape George 31
Posts: 3,094
Re: Tamaya Jupiter Sextant

Never used anything fancier than the Astra IIIB, but can't guess what would make a more expensive sextant "better". More ergonomic? Better optics? Lighter weight?
With the help of some simple directions, I was able to tune out the index error on my Astra. After months of use, the IE was still zero. Every time I check the IE, it's still zero. I'm not sure I could ask for better than that.
I'd love to handle some of the more expensive sextants, but I've been fully satisfied with my Astra. If you do go for a different sextant, look for one with a whole-horizon glass rather than a split-horizon. That did wonders to improve the speed as accuracy of my shots on a bouncing boat.
__________________
Ben
zartmancruising.com
Benz is offline   Reply With Quote
Old 29-01-2018, 06:38   #4
Registered User
 
double u's Avatar

Join Date: Feb 2016
Location: forest city
Boat: no boat any more
Posts: 2,511
Re: Tamaya Jupiter Sextant

for starshots the half-mirror seems to be better...
__________________
...not all who wander are lost!
double u is offline   Reply With Quote
Old 29-01-2018, 13:42   #5
֍֎֍֎֍֎֍֎֍֎

Join Date: Apr 2006
Posts: 15,136
Re: Tamaya Jupiter Sextant

benz-
"Better" means very subjective things. In theory a full-sized sextant is "better" because it will be more accurate. No, wait, full-sized means harder to stow and heavier so harder to hold up for longer periods, so small is better. No, wait...

Some "better" sextants focus the telescope by turning the rear ring. Oh wait, that means your eye will also unfocus the telescope by turning the ring if you are swinging it to get a level horizon, so those better sextants are worse?

And I've used a pricey fullsized Plath that had a totally undocumented feature I only noticed on star sights. Half the image had a very slight red tint, the other half a very slight green tint. Possibly just an artifact of the mirror coating, but it also made the image of a star POP into white when it was perfectly aligned. One could call that "better" than just trying to align shapes...but it was totally undocumented.

Better? Cheaper could be better, since all you have to do is drop a sextant to ruin it. Cheaper could let you buy a spare.

Bottom line, almost anything except the Indian Brass Gift Shop sextants will do a job well enough, the rest is whatever suits you best.
hellosailor is offline   Reply With Quote
Old 29-01-2018, 13:55   #6
Marine Service Provider

Join Date: Dec 2010
Location: Little Compton, RI
Boat: Cape George 31
Posts: 3,094
Re: Tamaya Jupiter Sextant

Quote:
Originally Posted by hellosailor View Post
benz-
"Better" means very subjective things. In theory a full-sized sextant is "better" because it will be more accurate. No, wait, full-sized means harder to stow and heavier so harder to hold up for longer periods, so small is better. No, wait...

Some "better" sextants focus the telescope by turning the rear ring. Oh wait, that means your eye will also unfocus the telescope by turning the ring if you are swinging it to get a level horizon, so those better sextants are worse?

And I've used a pricey fullsized Plath that had a totally undocumented feature I only noticed on star sights. Half the image had a very slight red tint, the other half a very slight green tint. Possibly just an artifact of the mirror coating, but it also made the image of a star POP into white when it was perfectly aligned. One could call that "better" than just trying to align shapes...but it was totally undocumented.

Better? Cheaper could be better, since all you have to do is drop a sextant to ruin it. Cheaper could let you buy a spare.

Bottom line, almost anything except the Indian Brass Gift Shop sextants will do a job well enough, the rest is whatever suits you best.
I wasn't aware that the Astra is not considered "Full Size." But if other sextants are bigger, that would be a problem, since the Astra is a handful as is.
Better optics was one of the things I mentioned could make the Astra better--that feature of the Plath you mention sounds nice, since my star shots are limited to twilight, and sometimes going later or earlier would be nice.
__________________
Ben
zartmancruising.com
Benz is offline   Reply With Quote
Old 29-01-2018, 14:45   #7
cruiser

Join Date: Nov 2017
Posts: 45
Re: Tamaya Jupiter Sextant

Do not know for Tamaya, I had Astra IIIb, my daughter bought me Spica as a birthday present, no difference so save money. how long they will last, it depends of you, if you take proper care they will both burry you. I had (still have Astra) for 10 years and it still looks like brand new and I am using it on almost daily basis during 3 to 6 months a year.
earlgray is offline   Reply With Quote
Old 29-01-2018, 15:38   #8
֍֎֍֎֍֎֍֎֍֎

Join Date: Apr 2006
Posts: 15,136
Re: Tamaya Jupiter Sextant

Don't know how the Astra compares in size, a friend of mine had one but I never held it side by side with anything else to compare. I know Tamaya does make a couple of sizes, again, I don't know which is which.

The Horizon Ultra (Plath) does have some other nice features, like a pair of polarizing rings (plus the usual shades) and a horizon prism all standard, but they're pricey new and scarce used.
hellosailor is offline   Reply With Quote
Old 26-02-2018, 04:11   #9
Registered User

Join Date: Dec 2013
Location: Liveaboard here and there!
Boat: 31' Southern Cross
Posts: 8
Send a message via Skype™ to Tina7
Re: Tamaya Jupiter Sextant

Have a Tayama Jupiter sextant for sale. Excellent condition.
Attached Thumbnails
Click image for larger version

Name:	IMG_2840~2.JPG
Views:	124
Size:	59.7 KB
ID:	164925   Click image for larger version

Name:	IMG_2841~2.JPG
Views:	140
Size:	68.3 KB
ID:	164926  

Click image for larger version

Name:	IMG_2842~2.JPG
Views:	135
Size:	81.4 KB
ID:	164927   Click image for larger version

Name:	IMG_2843.JPG
Views:	140
Size:	114.3 KB
ID:	164928  

Tina7 is offline   Reply With Quote
Old 01-03-2018, 03:01   #10
Marine Service Provider

Join Date: Dec 2010
Location: Little Compton, RI
Boat: Cape George 31
Posts: 3,094
Re: Tamaya Jupiter Sextant

Quote:
Originally Posted by Tina7 View Post
Have a Tayama Jupiter sextant for sale. Excellent condition.
What are you asking for it?
__________________
Ben
zartmancruising.com
Benz is offline   Reply With Quote
Old 01-03-2018, 03:22   #11
Registered User

Join Date: Dec 2013
Location: Liveaboard here and there!
Boat: 31' Southern Cross
Posts: 8
Send a message via Skype™ to Tina7
Re: Tamaya Jupiter Sextant

$800 + shipping from the US Virgin Islands
Tina7 is offline   Reply With Quote
Old 02-03-2018, 05:27   #12
Marine Service Provider

Join Date: Dec 2010
Location: Little Compton, RI
Boat: Cape George 31
Posts: 3,094
Re: Tamaya Jupiter Sextant

Quote:
Originally Posted by Tina7 View Post
$800 + shipping from the US Virgin Islands
Thank you. I'll ask around my cronies for interest.
__________________
Ben
zartmancruising.com
Benz is offline   Reply With Quote
Reply

Tags
sextant

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: Tamaya Sextant Model MS-933 & Tamaya Calculator NC - 2 NC-2 clairenicoleart General Classifieds (no boats) 13 08-04-2017 19:18
For Sale: Tamaya MS933 Micrometer Sextant livesonjura Classifieds Archive 5 20-01-2012 16:07
For Sale: Tamaya Sextant kevlarmike Classifieds Archive 0 06-07-2011 00:46
For Sale: Tamaya MS-933 Sextant mattyc Classifieds Archive 5 30-12-2010 11:53

Advertise Here


All times are GMT -7. The time now is 20:47.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.