Page 1 of 4 123 ... LastLast
Results 1 to 10 of 37
  1. #1
    RussL's Avatar
    RussL is offline Guest
    Points: 15,907, Level: 87
    Level completed: 2%, Points required for next Level: 343
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Nov 2008
    Location
    Cayce, South Carolina
    Posts
    1,931
    Points
    15,907
    Level
    87
    Thanks
    220
    Thanked 353x 209 Posts

    Default TMB 8mm Planetary First Light



    Heh, what Curse? No, I didn't say that. I mean, I have been favored by the Sky Beings to use my new TMB tonight. Unbelievable.

    I am limited in technical knowledge, but have read a lot. I am also limited in what to compare the TMB to, but again, as I said I at least have read enough to think of some things to look for.

    The package, a 6" cardboard cube, arrived at my wife's work early this morning. By noon it was at my work. Inside, the box was filled with styrofoam peanuts, in the middle of which was a plastic bag. In that was a very nice and durable black box of dense cardboard with a nice finish. The eyepiece was inside in another bag and wrapped in bubble wrap. Nice packaging. Thanks, Astronomics. I was surprised to see on the invoice that I had been given a NEAF special price of $40 plus $7.98 shipping. Wow, didn't expect that. Turns out that all the TMBs are on sale now for that price. Geez, I just ordered last Thursday. The sale must've been emminent at that time. What a great buy. The coatings looked good, no flaws, green and magenta. As a matter of fact it was hard to see my reflection in it. Mechanically the eyepiece is a nice piec of work, very solid and smooth operating with the twist-up eyecup.

    For tonight I used the ST80 f5 achromatic refractor. I figured that it would be a hard test to see if the TMB could improve the views below f6, and with false color going on.

    It did.

    The closest thing I have to compare it to is a 7.5mm Sirius Plossl. Not a bad eyepiece, and it gives me some platform to spring from. There were patchy clouds at first, but I caught Sirius for a star test. Really too bright, but I can say that the TMB did well with a good airy disc and two diffraction rings. Focus was best achieved by trying to balance the chromatic aberrration of the ST80. With the 43mm mask that was simplified. Both eyepieces performed well at this point, but of course for the first time ever I could look at something at 100x (with the 2x Ultima Borlow) and actually get my eye in the view. What a difference to see the whole field of view easily. The 14mm usable eye relief made all the difference. For me, with glasses I did best with the rubber eyecup folded down and the twist up feature all the way down. Hand-held, I thought it would seem longer, but in the scope I needed all I could get. Without my glasses I had to twist out about 5mm and unfold the cup. Very comfortable. And 58° of apparent field of view was much better than 52°. And the true field of view, which is 1.16° at 50x as opposed to 0.96° at 107 in the Plossl was better, too. The Plossl image did seem to be a hair brighter, though.

    Saturn. Now we're talking. The TMB was all they say it is on planets...ahem, including some lateral color which created a colored glow around the planet. The interesting thing is that the central image was full of detail. That made up for it and is what a planetary eyepiece is all about anyway. I didn't even notice it at first. It took awhile before it dawned on me. It's not a problem, but I had read about it or I would never have seen it. Compared to the Plossl there was much more detail and contrast. With the Barlow it was even better. I could see the rings crossing and two moons nearby--TO THE EDGE! It was that way without the Barlow, too. I mean, I watched Saturn set at the field stop with nary a change in sharpness. Even the two moons and shadow of the globe on the rings. I could see a lighter band under the rings that the Plossl didn't show me. This was all without the mask as Saturn doesn't need it in the ST80 (I swear, it's true). For once I didn't have to center an object before focusing. Some will argue that this can't be in an f5refractor, but I know what I saw. Colorwise, the TMB may be just a smidging warmer than the Plossl. Oh, I had a ghost image, but only when using the Barlow--and not with my glasses off. Never saw it with my glasses off, Barlow or not. It's not bright, though. No problem.

    Stars were different. The Beehive. OMG! Now 50x would show me all of it, but I had already counted 58 stars in it at 16x (much better than most nights--little 25mm Kellner trying to show off tonight). The TMB showed me that many in the center of the cluster at 50x. The Plossl still looked brighter, though. The best thing was to be able to see more of the object due to the increased true field of view and eye relief that's comfortable. And no barrel distortion that I could detect. Stars were pinpoints at all times, even with the Barlow. Again, it seemed that they were crisp to the edge, but if I tried hard I could see a slight difference at say, 95% out, although at other times I could watch stars go completely past the field stop with seemingly no change. I am very pleased to see an entire view filled with clear stars. The Plossl couldn't touch that!! Stars were shaped like badminton pucks by 80% out with it.

    Conclusion: I am impressed and very pleased in every way. I don't know how much better it gets with one that costs 3-5 times more, but it suits me. Plus, the weight was perfect, even with the Barlow and with the diagonal rotated level. The only thing I didn't like was the safety groove in the barrel, maybe because I'm not used to it. Goodness, for $48 dollars!! Ya'll ougtha check one out. For the price you cannot beat it, I say.

    Cheers.
    Last edited by RussL; 04-21-2009 at 03:59 AM.

  2. The Following 5 Users Say Thank You to RussL For This Useful Post:

    DizzyGazer (04-21-2009),FatherGuse (04-21-2009),roverich (04-22-2009),TCA (04-25-2009),velasoraptor (06-23-2010)

  3. #2
    RussL's Avatar
    RussL is offline Guest
    Points: 15,907, Level: 87
    Level completed: 2%, Points required for next Level: 343
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Nov 2008
    Location
    Cayce, South Carolina
    Posts
    1,931
    Points
    15,907
    Level
    87
    Thanks
    220
    Thanked 353x 209 Posts

    Default

    Hey, mods, I should've put this in the Eyepieces Forum, eh? If you could do that for me? Thanks.

  4. #3
    roverich's Avatar
    roverich is offline Moderator
    Points: 41,419, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Jan 2009
    Location
    virginia .usa
    Posts
    7,913
    Points
    41,419
    Level
    100
    Thanks
    2,009
    Thanked 1,963x 1,528 Posts

    Default

    Hi jack , I just might have to gt me one of those tmb eyepieces . They are worth the money for sure . 48 dollars shipped aint bad at all .....
    16in Night sky
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    F4.5 , 90mm refractor 500mm FL , 7in
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    classic Big-mac , Meade eye pieces with a few odd balls thrown in ...
    If you cant stand behind the american soldier ,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Please stand in front of one ...

  5. #4
    RussL's Avatar
    RussL is offline Guest
    Points: 15,907, Level: 87
    Level completed: 2%, Points required for next Level: 343
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Nov 2008
    Location
    Cayce, South Carolina
    Posts
    1,931
    Points
    15,907
    Level
    87
    Thanks
    220
    Thanked 353x 209 Posts

    Default

    Quote Originally Posted by roverich View Post
    Hi jack , I just might have to gt me one of those tmb eyepieces . They are worth the money for sure . 48 dollars shipped aint bad at all .....
    That's a fact, Rich.

    I forgot to mention that I split Castor clean at 50x--just barely, but that's the lowest power I've seen it that good at. Can't wait to see how it does on Epsilon Lyrae. I did use the 43mm mask on Castor and it helped a lot.

    Not a bad night out with an 80mm f5 achro and a $48 eyepiece, eh?

  6. #5
    FatherGuse's Avatar
    FatherGuse is offline HYPER GIANT
    Points: 14,603, Level: 83
    Level completed: 30%, Points required for next Level: 247
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points365 Days+ Registered Achievement!200+ Posts Achievement!
    Join Date
    Nov 2008
    Location
    Tarheel State, USA
    Posts
    2,027
    Points
    14,603
    Level
    83
    Thanks
    185
    Thanked 187x 147 Posts

    Default

    Quote Originally Posted by RussL View Post
    Hey, mods, I should've put this in the Eyepieces Forum, eh? If you could do that for me? Thanks.
    ... you got it brother ... done ...

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Bill - "Recreational 'Stronomer" and "Astro-Junk User" ... EGO lego , proinde EGO operor ...

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  7. The Following User Says Thank You to FatherGuse For This Useful Post:

    RussL (04-21-2009)

  8. #6
    RussL's Avatar
    RussL is offline Guest
    Points: 15,907, Level: 87
    Level completed: 2%, Points required for next Level: 343
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Nov 2008
    Location
    Cayce, South Carolina
    Posts
    1,931
    Points
    15,907
    Level
    87
    Thanks
    220
    Thanked 353x 209 Posts

    Default

    Thanks a bunch, Bill.

  9. #7
    JimK's Avatar
    JimK is offline Guest
    Points: 7,727, Level: 61
    Level completed: 59%, Points required for next Level: 123
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement50 Posts Achievement!
    Join Date
    Sep 2008
    Location
    Tennessee
    Posts
    60
    Points
    7,727
    Level
    61
    Thanks
    0
    Thanked 14x 9 Posts

    Default

    Well Dawg, with due diligence and much thought you came up with a winner. Good for you!

    I'll definitely check out Astronomics before the sale is over.

    Great report by the way

    j

  10. The Following User Says Thank You to JimK For This Useful Post:

    RussL (04-22-2009)

  11. #8
    RussL's Avatar
    RussL is offline Guest
    Points: 15,907, Level: 87
    Level completed: 2%, Points required for next Level: 343
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Nov 2008
    Location
    Cayce, South Carolina
    Posts
    1,931
    Points
    15,907
    Level
    87
    Thanks
    220
    Thanked 353x 209 Posts

    Default

    Thanks Jimbro. Go getcha one--heck--or two. Jacob will probably want one.

    I was out again tonight although not a good night, but just to stare into the TMB for awhile to get a feeling what it feels like. I could use about 2mm more eye relief, but it's not bad. I'm right at the point of touching the eyepiece with my glasses by the time I see the whole field of view. But for what I bought it for (an easy-to-look-in high power for the ST80), it works admirably. I usually hover on the edge of seeing the whole field, but not quite. That's so much better than the 5mm eye relief of the Plossl.

    Scope's still out. Waiting on the clouds. Cheers!

  12. #9
    FatherGuse's Avatar
    FatherGuse is offline HYPER GIANT
    Points: 14,603, Level: 83
    Level completed: 30%, Points required for next Level: 247
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points365 Days+ Registered Achievement!200+ Posts Achievement!
    Join Date
    Nov 2008
    Location
    Tarheel State, USA
    Posts
    2,027
    Points
    14,603
    Level
    83
    Thanks
    185
    Thanked 187x 147 Posts

    Default

    ... happy hunting brother ...

    ... got to get me a few of these ... would like to see what they can do with my C6R ... heh heh ...

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Bill - "Recreational 'Stronomer" and "Astro-Junk User" ... EGO lego , proinde EGO operor ...

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  13. #10
    roverich's Avatar
    roverich is offline Moderator
    Points: 41,419, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Join Date
    Jan 2009
    Location
    virginia .usa
    Posts
    7,913
    Points
    41,419
    Level
    100
    Thanks
    2,009
    Thanked 1,963x 1,528 Posts

    Default

    Thats awesome jack . I view without my glasses generaly . I havent gotten used to viewing with them so for now i leave em off . Its been cloudy here so my stuff is in cases ...
    16in Night sky
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    F4.5 , 90mm refractor 500mm FL , 7in
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    classic Big-mac , Meade eye pieces with a few odd balls thrown in ...
    If you cant stand behind the american soldier ,
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Please stand in front of one ...

 

 
Page 1 of 4 123 ... LastLast

Similar Threads

  1. First Light Canon Rebel T2i - Light Pollution, grrrr.
    By DMouse in forum Astronomy Digital Cameras Forum
    Replies: 6
    Last Post: 02-05-2011, 02:53 AM
  2. Replies: 3
    Last Post: 05-08-2010, 11:48 PM
  3. Replies: 14
    Last Post: 11-30-2007, 01:03 PM
  4. Revelation 20 - Planetary Centuries & planetary centuries
    By mitchsperkins@gmail.com in forum Amateur Astronomy Forum
    Replies: 9
    Last Post: 11-13-2007, 07:04 AM
  5. How to make a light-tight red-light sign box for star parties
    By canopus56 in forum Amateur Astronomy Forum
    Replies: 3
    Last Post: 06-05-2006, 07:08 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 01:29 AM.